Building

Abstract

To provide a building capable of efficiently exhausting air under a roof material and air in a side wall portion from a protruding part.SOLUTION: The building includes a roof material, a side wall portion extending in the vertical direction to define a wall ventilation channel, a protrusion portion connecting the roof material and the side wall portion, a plurality of beams arranged below the roof material and extending in at least one of a first direction and a second direction, a plurality of support members each having an upper end portion that supports the roof material from below so as to form a space between the roof material and the plurality of beams in the vertical direction, and a first insulating member surrounded by the plurality of support members and having an upper surface arranged at a distance below the roof material to form a roof ventilation channel between the roof material and the first insulating member. The roof ventilation channel has an air inlet and an air outlet and is arranged between the roof material and the first insulating member from the air inlet to the air outlet, and the protrusion portion has exhaust channels connecting each of the roof ventilation channel and the wall ventilation channel to an outdoor space.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to buildings. [Background technology]

[0002] Buildings with horizontally extending roofs (so-called flat roofs) and ventilation paths for the space under the roof have been known for some time. For example, Patent Document 1 discloses a building with a horizontally extending flat roof, vertically extending exterior materials, and a parapet that protrudes upward from the flat roof and connects the flat roof and the exterior materials. The building also includes rafters supporting the flat roof from below and insulation spaced below the floor plywood that forms the flat roof to form a ventilation path. In this building, the path for discharging moisture from the attic space below the flat roof is interrupted by the rafters, so the floor plywood above the rafters is partially cut out to allow ventilation through the cutouts and over the rafters. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-127340 Summary of the Invention [Problem to be solved by the invention]

[0004] The building described in Patent Document 1 has a problem in that the space under the flat roof cannot be adequately ventilated. Specifically, in the above building, air flows under the flat roof while moving up and down, overhanging the rafters, which makes it easy for air to stagnate in parts. Furthermore, in order for the rafters to maintain their function of supporting the plywood flooring of the flat roof, the size of the cutouts is limited, making it difficult for air to overhang the rafters. As a result, air under the flat roof cannot be efficiently sent to the parapet.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a building that can efficiently exhaust air under the roof material and air within the side wall portion through the protruding portion. [Means for solving the problem]

[0006] In order to solve the above problems, a building according to a first invention includes a roofing material extending in a horizontal direction, side wall portions extending in the vertical direction so as to define wall ventilation channels through which air flows in the vertical direction, a protrusion arranged to protrude upward from the roofing material and connecting the roofing material to the side wall portions, a plurality of beams arranged below the roofing material and extending in at least one of a horizontal first direction and a horizontal second direction intersecting both the first direction and the vertical direction, and each of the beams has an upper end portion that supports the roofing material from below so as to form a space between the roofing material and the plurality of beams in the vertical direction, and is arranged on the plurality of beams, and The roof ventilation system comprises a plurality of support members extending in at least one of two directions, and a first insulating member surrounded by the plurality of support members, the first insulating member having an upper surface spaced below the roof material so as to form a roof ventilation channel between the roof material and the roof material in the space, through which air flows in at least one of the first and second directions, wherein the roof ventilation channel has an air inlet, an air outlet, and a connecting channel connecting the air inlet and the air outlet, and the section from the air inlet to the air outlet is arranged between the roof material and the first insulating member in the vertical direction, and the protruding portion has exhaust channels connecting each of the outlets of the roof ventilation channel and the wall ventilation channel to an outdoor space.

[0007] According to the building of the first invention, the upper ends of each of the multiple support members support the roof material from below, forming a space between the roof material and the multiple beams. The upper surface of the first insulating member is positioned below the roof material at a distance so that a roof ventilation channel is formed in this space. The roof ventilation channel is positioned between the upper surface of the first insulating member and the roof material from its air inlet to its air outlet. In this way, the entire roof ventilation channel is positioned above the multiple beams, so the air flow is not obstructed by the multiple beams, and air can be sent directly from the roof ventilation channel to the protrusion. This allows air to be sent to the protrusion more efficiently than when air bypasses the beams before reaching the protrusion. As a result, air under the roof and air within the side wall can be efficiently exhausted through the protrusion.

[0008] A second invention is that in a building according to the first invention, at least some of the plurality of support members may have openings formed therein that allow air flowing through the roof ventilation passage to pass through the support members.

[0009] With this configuration, even if some support members are interposed between the roof ventilation channel and the exhaust channel, these support members have openings, which prevents the air from flowing from the roof ventilation channel to the protrusion by the support members.

[0010] A third invention may be a building according to the first or second invention, further comprising a ceiling member arranged at a distance below the first insulating member to form an attic space between the ceiling member and the first insulating member in the vertical direction and to separate the attic space from the indoor space below the attic space, and a roof moisture-proof line arranged along the underside of the first insulating member to prevent moisture that has passed through the ceiling member from the indoor space from reaching the first insulating member.

[0011] With this configuration, a roof moisture-proof line is arranged along the underside of the first insulating member, and a ceiling member is arranged below the first insulating member at a distance so as to form an attic space between the first insulating member and the ceiling member. With this structure, a larger attic space can be formed between the first insulating member and the ceiling member, compared to a structure in which a moisture-proof line is arranged on the ceiling member and an insulating member is arranged on the moisture-proof line.

[0012] Furthermore, with the above-mentioned configuration, the first insulating member is positioned above the roof moisture barrier line, so the first insulating member can prevent the roof moisture barrier line from being cooled by outside air passing through the roof material from the outdoor space, such as in winter. As a result, even if humid indoor air passes through the ceiling member from the indoor space and reaches the roof moisture barrier line, this air is less likely to be cooled, making it less likely to form condensation. In other words, with the above-mentioned configuration, the occurrence of so-called winter condensation can be prevented, and the environment in the formed attic space can be kept good, maintaining an environment equivalent to that of the indoor space.

[0013] A fourth invention may be such that, in a building according to any one of the first to third inventions, the building further comprises a second insulating member arranged below the first insulating member so as to sandwich the roof moisture-proof line from above and below between the second insulating member and the first insulating member.

[0014] With this configuration, the second insulating member is positioned below the roof moisture barrier line, so the second insulating member can prevent the roof moisture barrier line from being cooled by indoor air that is cooled by the air conditioning unit and passes through the ceiling member in the summer, etc. As a result, even if humid outside air passes through the roof material from outdoors and reaches the roof moisture barrier line, the outside air is less likely to be cooled, making condensation less likely to occur. In other words, the above configuration prevents the occurrence of so-called summer condensation, maintains a good environment in the formed attic space, and maintains an environment equivalent to that of the indoor space. [Effects of the Invention]

[0015] According to the present invention, a building is provided in which the air under the roof material and the air within the side wall portion can be efficiently exhausted through the protruding portion. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a front cross-sectional view of a building according to an embodiment of the present invention. [Figure 2] 1 is a plan cross-sectional view of a building according to one embodiment of the present invention. [Figure 3] 1A is a front view of the second support member, FIG. 1B is a side view thereof, and FIG. 1C is a top view thereof. [Figure 4] FIG. 2 is an enlarged front cross-sectional view of the periphery of a side wall portion of the building in FIG. 1. [Figure 5] FIG. 10 is a front cross-sectional view of a building according to a first modified embodiment of the present disclosure. [Figure 6] FIG. 10 is a plan cross-sectional view of a building according to a first modified embodiment of the present disclosure. [Figure 7] FIG. 10 is a front cross-sectional view of a protrusion according to a second modified embodiment of the present disclosure. [Figure 8] FIG. 10 is a front cross-sectional view of a protrusion according to a third modified embodiment of the present disclosure. [Figure 9] FIG. 10 is a front cross-sectional view of a protrusion according to a fourth modified embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0017] A building 1 according to one embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front cross-sectional view showing the structure of a building 1 according to one embodiment of the present invention. FIG. 2 is a plan cross-sectional view of the building 1. Note that FIG. 1 corresponds to the cross section at position II in FIG. 2. Each drawing shows a vertical direction, a horizontal first direction, and a horizontal second direction that intersects with both the first direction and the vertical direction, but these directions are shown to explain the building 1 according to this embodiment and do not limit the structure, usage, etc. of the building according to the present invention.

[0018] As shown in Figures 1 and 2, the building 1 comprises a roofing material 11, a roof-mounted insulation member 12, a waterproof sheet 13, a drain section 14, a plurality of beams 20, a plurality of support members 30, a roof-side first insulation member 40 (an example of a first insulation member), a first auxiliary insulation member 60, a roof moisture-proof line 70, an indoor moisture-proof line 75, a roof-side second insulation member 80 (an example of a second insulation member), a second auxiliary insulation member 90, a ceiling member 100, a side wall section 110, and a protrusion 300.

[0019] 1, the roofing material 11 extends horizontally and separates an outdoor space OS above the roofing material 11 from an attic space S1 below the roofing material 11. The roofing material 11 is made of, for example, plywood.

[0020] The roof-mounted heat insulating member 12 is placed on the roof material 11 and enhances the heat insulation between the outdoor space OS and the attic space S1.

[0021] The waterproof sheet 13 is placed on the roof insulation member 12 to prevent rainwater and the like from entering the attic space S1.

[0022] The drain section 14 includes a drain pipe that opens upward and a drain cap that covers the opening of the drain pipe. Rainwater and other water that accumulates on the roof material 11 flows into the drain pipe through holes formed in the drain cap and is then discharged from the drain pipe to the outside of the building 1.

[0023] The multiple beams 20 are structural members of the building 1 and are arranged below the roof material 11. As shown in FIG. 2, the multiple beams 20 according to this embodiment are composed of a first beam 21, a second beam 22, a third beam 23, a fourth beam 24, and a fifth beam 25. The first beam 21 to the third beam 23 are arranged at intervals in the first direction and extend in the second direction. The first beam 21 to the third beam 23 are arranged in this order from one side in the first direction (the left side in FIG. 2) to the other side in the first direction (the right side in FIG. 2). The fourth beam 24 extends in the first direction so as to connect the ends of the first beams 21 to the third beams 23 on one side in the second direction (the upper side in FIG. 2). The fifth beam 25 is disposed at an interval in the second direction relative to the fourth beam 24, and extends in the first direction so as to connect the ends of the first beam 21 to the third beam 23 on the other side in the second direction (the lower side in FIG. 2). Note that the multiple beams 20 may extend in the first direction or the second direction.

[0024] The multiple support members 30 are respectively disposed on the upper surfaces (beam upper surfaces) of the multiple beams 20. As shown in FIG. 2, the multiple support members 30 according to this embodiment are composed of a first support member 31 to a ninth support member 39. The first support member 31 is disposed on the upper surface 21a of the first beam 21 and extends in the second direction. The second support member 32 is disposed on the upper surface 23a of the third beam 23 and extends in the second direction. The third support member 33 is disposed on the upper surface 24a of the fourth beam 24 and extends in the first direction so as to connect the ends of the first support member 31 and the second support member 32 on one side in the second direction (the upper side in FIG. 2). Each of the fourth support member 34 to the eighth support member 38 has a portion disposed on the upper surface 21a of the first beam 21, a portion disposed on the upper surface 22a of the second beam 22, and a portion disposed on the upper surface 23a of the third beam 23, and extends in the first direction to connect the first support member 31 and the second support member 32. The ninth support member 39 is disposed on the upper surface 25a of the fifth beam 25, and extends in the first direction to connect the ends of the first support member 31 and the second support member 32 on the other side in the second direction (the lower side in FIG. 2). Note that the multiple support members 30 may extend in the first direction or the second direction.

[0025] Referring to FIG. 1, each of the multiple support members 30 has an upper end (upper end of the support member) 30a that supports the roof material 11 from below so that a beam space S2 is formed between the roof material 11 and the multiple beams 20 in the vertical direction. In this embodiment, the height positions of the upper ends 30a in the vertical direction are set to be the same. In other words, the upper ends 30a are located on the same plane in the horizontal direction. The multiple support members 30 are formed, for example, by rafters.

[0026] FIG. 3 shows the second support member 32 of the building 1, with FIG. 3(A) being its front view. FIG. 3(B) is its side view, and FIG. 3(C) is its top view. As shown in FIGS. 3(A) to 3(C), the second support member 32 has openings that allow air flowing through multiple roof ventilation channels 50 (described later) to pass through the second support member 32. The openings according to this embodiment are six notches 32C, each cut downward from the top surface of the second support member 32 and spaced apart from one another in the second direction. However, the configuration of the openings is not limited thereto, and the openings may be, for example, six holes opened in the second support member 32 at intervals from one another in the second direction. The above-described openings may be formed not only in the second support member 32 but also in the first support member 31 and any of the third support member 33 to the ninth support member 39.

[0027] Returning to FIG. 1 , the roof-side first insulating member 40 is housed inside the multiple support members 30 so as to be surrounded by them. Specifically, as shown in FIG. 2 , the roof-side first insulating member 40 is housed inside the first support member 31, the second support member 32, the third support member 33, the beams of the third support member 33, and the ninth support member 39 so as to be surrounded by them. Note that FIG. 2 only shows a portion near the outline of the roof-side first insulating member 40, and does not show other portions. As shown in FIG. 1 , the roof-side first insulating member 40 is disposed so as to cover the inner surface of each support member 30 from the lower end to the center in the vertical direction. The roof-side first insulating member 40 is made of a hard insulating material such as extruded polystyrene foam.

[0028] The roof-side first insulating member 40 has an upper surface (first insulating upper surface) 40a that is disposed below the roof material 11 at a distance. As shown in FIG. 1, a plurality of roof ventilation passages 50 through which air flows to the other side in the first direction are formed between the upper surface 40a and the roof material 11 in the vertical direction. In other words, a plurality of roof ventilation passages 50 are formed in the beam space S2. FIG. 1 shows a first roof ventilation passage 51 of the plurality of roof ventilation passages 50.

[0029] 1 and 2 is merely an example. The arrangement of the roof-side first insulating members 40 can be changed as appropriate as long as multiple roof ventilation channels 50 are formed between the upper surface 40a and the roof material 11 in the vertical direction. Therefore, the roof-side first insulating members 40 do not necessarily have to be arranged to cover from the lower end to the center in the vertical direction of the inner surface of each support member 30. For example, the roof-side first insulating members 40 may cover only the lower end of the inner surface of each support member 30.

[0030] Each of the multiple roof ventilation channels 50 has an air inlet EN, an air outlet EX, and a connecting channel CN connecting the air inlet EN and the air outlet EX. As shown in FIG. 1 , the section from the air inlet EN to the air outlet EX is disposed vertically between the roof material 11 and the upper surface 40a of the roof-side first insulating member 40. The "air inlet EN" refers to an entrance through which air enters between the roof material 11 and the upper surface 40a of the roof-side first insulating member 40 from the second indoor space RM2 (described later) or the like. While FIGS. 1 and 2 show an example in which the air inlet EN is located near the first support member 31, this is merely an example, and the air inlet EN may be located in a position other than that shown in FIGS. 1 and 2 . Furthermore, there may be multiple air inlets EN. In this embodiment, each of the six cutouts 32C formed in the second support member 32 functions as an air outlet EX for each of the first roof ventilation channels 51 to the sixth roof ventilation channels 56. It is only necessary that the multiple roof ventilation channels 50 are arranged in the vertical direction from the air inlet EN to the air outlet EX between the roof material 11 and the upper surface 40a of the roof-side first insulating member 40. For this reason, as shown in Fig. 1 , the air outlet EX may be arranged on one side of the roof-side first insulating member 40 in the first direction.

[0031] As shown in FIG. 2, the multiple roof ventilation ducts 50 according to this embodiment are composed of a first roof ventilation duct 51 to a sixth roof ventilation duct 56. As indicated by arrows A1 to A6 in FIG. 2, air flows toward the other side in the first direction through the multiple roof ventilation ducts 50. Each of the multiple roof ventilation ducts 50 is arranged between the multiple support members 30 in the second direction. For example, the first roof ventilation duct 51 is arranged between the third support member 33 and the fourth support member 34 in the second direction. The second roof ventilation duct 52 is arranged between the fourth support member 34 and the fifth support member 35 in the second direction. Similarly, the third roof ventilation duct 53, the fourth roof ventilation duct 54, the fifth roof ventilation duct 55, and the sixth roof ventilation duct 56 are arranged.

[0032] Returning to Figure 1, the first auxiliary insulating member 60 is disposed above the roof-side first insulating member 40 and covers the other side surface of the first support member 31 in the first direction. The first auxiliary insulating member 60 is made of an insulating material such as extruded polystyrene foam.

[0033] The roof moisture-proof line 70 is arranged along the underside (first insulation underside) 40b of the roof-side first insulation member 40, and prevents moisture that has passed through the ceiling member 100 from reaching the roof-side first insulation member 40 (the beam-above-beam space S2) in winter, and prevents moisture that has entered through the connection path CN from reaching the roof-side second insulation member 80 (the attic space S3 described below) in summer. The roof moisture-proof line 70 is made of, for example, a moisture-proof sheet made of resin. The roof moisture-proof line 70 extends in a planar shape in the first and second directions, and has one end in the first direction and another end in the first direction. The one end in the first direction is connected to the lower end of the indoor moisture-proof line 75, and the other end in the first direction is connected to the upper end of the wall moisture-proof line 200.

[0034] The indoor moisture-proof line 75 extends vertically to connect to the one end of the roof moisture-proof line 70, and in this embodiment, improves moisture-proofing between the first indoor space RM1 and the outdoor space OS, which are located on one side of the indoor moisture-proof line 75 in the first direction. The indoor moisture-proof line 75 is made of, for example, a moisture-proof sheet made of resin. Note that the first indoor space RM1 is not essential.

[0035] The roof-side second insulation member 80 is disposed below the roof-side first insulation member 40 so as to sandwich the roof moisture-proof line 70 between the roof-side first insulation member 40 from above and below, and is housed inside the multiple beams 20. Specifically, the roof-side second insulation member 80 according to this embodiment is composed of a second insulation member element 81 on one side housed inside the first beam 21, second beam 22, fourth beam 24, and fifth beam 25, and a second insulation member element 82 on the other side housed inside the second beam 22, third beam 23, fourth beam 24, and fifth beam 25. Both second insulation member elements 81, 82 are disposed inside each beam so as to cover the upper part of the inner surface of each beam. Both second insulation member elements 81, 82 are composed of an insulation material such as extruded polystyrene foam.

[0036] The second auxiliary insulating member 90 is disposed below the roof-side second insulating member 80 and covers approximately the center of one side surface of the third beam 23 in the first direction. The second auxiliary insulating member 90 is made of an insulating material such as extruded polystyrene foam.

[0037] The ceiling member 100 is disposed below the roof-side first insulating member 40 at a distance so as to form an attic space S3 between itself and the roof-side first insulating member 40 in the vertical direction and to separate the attic space S3 from a second indoor space RM2 (an example of an indoor space) below the attic space S3. In this embodiment, the ceiling member 100 is disposed below the roof-side second insulating member 80 at a distance. The ceiling member 100 also forms an attic space S1 between itself and the roofing material 11 in the vertical direction. That is, in this embodiment, the space existing between the roofing material 11 and the ceiling member 100 in the vertical direction is the attic space S1, the space existing between the roofing material 11 and the multiple beams 20 in the vertical direction is the beam space S2, and the space existing between the roof-side first insulating member 40 and the ceiling member 100 in the vertical direction is the attic space S3.

[0038] The side wall portion 110 is disposed at a position spaced apart from the roof material 11 on the other side in the first direction, and extends in the vertical direction so as to define a wall ventilation passage 115 through which air flows in the vertical direction.

[0039] Fig. 4 is an enlarged front cross-sectional view of the periphery of the side wall portion 110 of the building 1 of Fig. 1. As shown in Fig. 4, the building 1 further includes, on one side of the side wall portion 110 in the first direction, a wall-side first vertical frame portion 120, a wall-side waterproof and windproof sheet 130, a wall-side first insulating member 140, a wall-side base material 150, a wall-side second vertical frame portion 160, a wall-side horizontal frame portion 170, a wall-side second insulating member 180, a wall-side third insulating member 190, a wall moisture-proof line 200, a frame body 210, and an inner wall 220.

[0040] The wall-side first vertical frame portion 120 is positioned at a distance from the side wall portion 110 to one side in the first direction, and extends in the vertical direction so as to form a wall ventilation passage 115 between itself and the side wall portion 110 in the first direction.

[0041] The wall-side waterproof and windproof sheet 130 is arranged to cover the other side of the wall-side first vertical frame section 120 in the first direction, and extends in the vertical direction to prevent rain and wind from passing through the wall-side first vertical frame section 120 in the first direction.

[0042] The first wall-side insulating member 140 is disposed on the other side of the first wall-side vertical frame portion 120 in the second direction and extends in the up-down direction. As shown in Fig. 4, the dimension of the first wall-side insulating member 140 in the first direction is approximately the same as the dimension of the first wall-side vertical frame portion 120 in the first direction. The first wall-side insulating member 140 is made of a hard insulating material such as extruded polystyrene foam.

[0043] The wall-side base material 150 is disposed on one side of the wall-side first vertical frame portion 120 in the first direction, and extends in the up-down direction. The wall-side base material 150 according to this embodiment is made of, for example, plywood.

[0044] The wall-side second vertical frame portion 160 is disposed on one side of the wall-side base material 150 in the first direction and on the other side of the second support member 32 in the first direction, and extends in the up-down direction. In this embodiment, a communication passage 161 is formed on the other side of the wall-side second vertical frame portion 160 in the second direction, which communicates between the multiple roof ventilation passages 50 and a roof exhaust passage 375 described later.

[0045] The wall-side horizontal frame portion 170 is disposed on the third beam 23 and extends in the second direction with the lower end of the wall-side second vertical frame portion 160 as a base point.

[0046] The second wall-side insulating member 180 is disposed on the other side of the second wall-side vertical frame portion 160 in the second direction, and is provided on the wall-side horizontal frame portion 170. As shown in FIG. 4, the second wall-side insulating member 180 has an upper surface (second insulating upper surface) 180a that is substantially flush with the bottom surface 32b of the cutout 32C of the second support member 32 in the first direction. Also, as shown in FIG. 4, the dimension of the second wall-side insulating member 180 in the first direction is substantially the same as the dimension of the second wall-side vertical frame portion 160 in the first direction. The second wall-side insulating member 180 according to this embodiment is made of a hard insulating material such as extruded polystyrene foam.

[0047] The wall-side third insulating member 190 is disposed on one side of the wall-side base material 150 in the first direction and below the third beam 23, and extends in the vertical direction. The wall-side third insulating member 190 is made of a fiber-based insulating material such as cellulose fiber, rock wool, or glass wool. However, the wall-side third insulating member 190 may also be made of a hard insulating material such as extruded polystyrene foam.

[0048] The wall moisture-proof line 200 is arranged on one side of the wall-side third insulating member 190 and the third beam 23 in the first direction, and extends in the vertical direction so as to connect to the other end of the roof moisture-proof line 70 in the first direction. The wall moisture-proof line 200 is made of, for example, a moisture-proof sheet made of resin.

[0049] The frame 210 is disposed on one side of the wall moisture-proof line 200 in the first direction. The frame 210 has a vertical frame extending in the up-down direction and a horizontal frame extending in the second direction from the upper end of the vertical frame.

[0050] The inner wall 220 is disposed on one side of the frame body 210 in the first direction, extends in the vertical direction so as to connect to the other end of the ceiling member 100 in the first direction, and defines the second interior space RM2 together with the ceiling member 100. The inner wall 220 is made of a board material such as gypsum board.

[0051] Continuing to refer to FIG. 4, protrusion 300 is disposed to protrude upward from roofing material 11 and connects roofing material 11 and side wall 110. Protrusion 300 according to this embodiment is a parapet that rises from the other end of roofing material 11 in the first direction and extends in the second direction. As shown in FIG. 4, protrusion 300 includes protrusion outer wall 310, protrusion-side first vertical frame 320, protrusion-side waterproof and windproof sheet 325, protrusion-side first horizontal frame 330, protrusion-side base material 335, protrusion-side second vertical frame 340, protrusion-side second horizontal frame 350, base wood 360, protrusion inner wall 370, protrusion top wall 380, waterproof material 385, and cover member 390.

[0052] The protrusion outer wall 310 has a lower end that connects to the upper end of the side wall portion 110 and extends in the vertical direction to define a wall exhaust passage 315 (an example of an exhaust passage) that indirectly connects the outlet 115A (Figure 4) of the wall ventilation passage 115 to the outdoor space OS.

[0053] The protrusion-side first vertical frame portion 320 is disposed at a distance from the protrusion outer wall 310 on one side in the first direction, and forms a wall exhaust passage 315 between itself and the protrusion outer wall 310 in the first direction. The protrusion-side first vertical frame portion 320 has a lower end connected to the upper end of the wall-side first vertical frame portion 120, and extends in the up-down direction.

[0054] Protrusion-side waterproof and windproof sheet 325 is arranged on the other side of protrusion-side first vertical frame portion 320 in the first direction so as to cover protrusion-side first vertical frame portion 320, has a lower end connected to the upper end of wall-side waterproof and windproof sheet 130, and extends in the up-down direction. Protrusion-side waterproof and windproof sheet 325 prevents rain and wind from passing through protrusion-side first vertical frame portion 320 in the first direction.

[0055] The protrusion-side first horizontal frame portion 330 is connected to the upper end of the protrusion-side first vertical frame portion 320 and extends in the second direction.

[0056] The protrusion-side base material 335 is arranged on one side of the protrusion-side first vertical frame portion 320 in the first direction, has a lower end that connects to the upper end of the wall-side base material 150, and extends in the vertical direction.

[0057] The protrusion-side second vertical frame portion 340 is arranged on one side of the protrusion-side base material 335 in the first direction, has a lower end connected to the upper end of the wall-side second vertical frame portion 160, and extends in the up-down direction.

[0058] The protrusion-side second horizontal frame portion 350 is connected to the upper end of the wall-side second vertical frame portion 160 and extends in the second direction. The protrusion-side second horizontal frame portion 350 has a second horizontal frame opening formed therein that allows air to pass through the protrusion-side second horizontal frame portion 350 in the vertical direction.

[0059] The base board 360 is disposed between the protrusion-side base material 335 and the protrusion inner wall 370 in the first direction, and below the protrusion-side second horizontal frame portion 350, and extends in the second direction. The base board 360 has a base board opening formed therein that communicates with the second horizontal frame opening of the protrusion-side second horizontal frame portion 350 and allows air to pass through the base board 360 in the vertical direction.

[0060] The protrusion inner wall 370 is disposed at a predetermined interval on one side in the first direction relative to the protrusion-side base material 335, and forms a roof exhaust passage 375 (an example of an exhaust passage) indirectly connecting the outlets EX of the multiple roof ventilation passages 50 with the outdoor space OS between the protrusion inner wall 370 and the protrusion-side base material 335 in the first direction. The protrusion inner wall 370 extends in the vertical direction so as to protrude upward from the end of the other side of the roof material 11 in the first direction as a base point. The protrusion inner wall 370 is fixed to the base wood 360 with fixing members such as screws.

[0061] The protrusion top wall 380 extends in the first direction so as to connect the upper end of the protrusion inner wall 370 and the upper end of the protrusion outer wall 310. The protrusion top wall 380 is formed with a wall-side opening 381 that connects the wall exhaust path 315 with an under-cover space P (described later) and a roof-side opening 382 that connects the roof exhaust path 375 with an under-cover space P (described later). The wall-side opening 381 and the roof-side opening 382 are, for example, holes that penetrate the protrusion top wall 380 in the vertical direction.

[0062] The waterproofing material 385 is provided along the underside of the protruding top wall 380, and prevents rainwater and the like from entering at least one of the wall-side opening 381 and the roof-side opening 382. The other end of the waterproofing material 385 in the first direction is connected to the upper end of the wall-side waterproof and windproof sheet 130.

[0063] Cover member 390 is disposed on protrusion top wall 380 so as to cover the upper end of protrusion top wall 380. Cover member 390 has a cover top surface portion 391, a one-side convex portion 392, and an other-side convex portion 393.

[0064] Cover top surface portion 391 is supported from below by legs (not shown) rising from protrusion top wall 380 so that an under-cover space P is formed between cover top surface portion 391 and protrusion top wall 380 in the up-down direction, and extends in the first direction above protrusion top wall 380. As shown in FIG. 4, the dimension of cover top surface portion 391 in the first direction is larger than the dimension of protrusion top wall 380 in the first direction.

[0065] The one-side convex portion 392 protrudes downward from an end portion on one side of the cover top surface portion 391 in the first direction as a base point so that a first gap G1 is formed between the one-side convex portion 392 and the protrusion portion inner wall 370 in the first direction.

[0066] The other-side convex portion 393 protrudes downward from the other-side end of the cover top surface portion 391 in the first direction as a base point so that a second gap G2 is formed between the other-side convex portion 393 and the protrusion outer wall 310 in the first direction.

[0067] The wall exhaust passage 315 indirectly connects the wall ventilation passage 115 and the outdoor space OS. The wall exhaust passage 315 according to this embodiment is formed in the first direction between the protrusion outer wall 310 and the protrusion-side first vertical frame portion 320. As indicated by arrow A7 in FIG. 4 , in this embodiment, air flowing from the wall ventilation passage 115 to the wall exhaust passage 315 passes through the wall-side opening 381 in the protrusion top wall 380 to reach the under-cover space P, and then passes from the under-cover space P through the second gap G2 to reach the outdoor space OS. Note that the air flowing into the under-cover space P may also flow into the outdoor space OS through the first gap G1 instead of the second gap G2.

[0068] The roof exhaust duct 375 indirectly connects the multiple roof ventilation ducts 50 to the outdoor space OS. The roof exhaust duct 375 according to this embodiment is formed between the protrusion-side base material 335 and the protrusion inner wall 370 in the first direction and on the other side of the protrusion-side second vertical frame portion 340 in the second direction. As indicated by arrow A8 in FIG. 4 , in this embodiment, air flowing from the multiple roof ventilation ducts 50 to the roof exhaust duct 375 via the communication passage 161 reaches the under-cover space P through the base wood opening in the base wood 360, the second horizontal frame opening in the protrusion-side second horizontal frame portion 350, and the roof-side opening 382 in the protrusion top wall 380. From the under-cover space P, the air passes through the first gap G1 and reaches the outdoor space OS. Note that the air flowing into the under-cover space P may also flow into the outdoor space OS through the second gap G2 instead of the first gap G1.

[0069] Next, the effects of this embodiment will be described.

[0070] In the building 1 according to this embodiment, the upper end portions 30a of the plurality of support members 30 support the roof material 11 from below so that a beam space S2 is formed between the roof material 11 and the plurality of beams 20. The upper surfaces 40a of the roof-side first insulation members 40 are disposed below the roof material 11 at intervals so that a plurality of roof ventilation channels 50 are formed in the beam space S2. Here, each of the plurality of roof ventilation channels 50 is disposed between the upper surface 40a of the roof-side first insulation member 40 and the roof material 11 in the vertical direction from the air inlet EN to the air outlet EX. In this way, the entirety of each of the plurality of roof ventilation channels 50 is disposed above the plurality of beams 20, so that the air flow in the plurality of roof ventilation channels 50 is not obstructed by the plurality of beams 20, and air can be sent directly from the plurality of roof ventilation channels 50 to the protrusion 300. This allows air to be sent to the protrusion 300 more efficiently than in other buildings where an opening is provided in the roof material directly above the beam, causing the air under the roof material to travel (bypass) over the beam through the opening before reaching the protrusion. As a result, air from the multiple roof ventilation ducts 50 and the wall ventilation duct 115 can be efficiently exhausted from the protrusion 300.

[0071] Furthermore, in the building 1 according to this embodiment, the air flow in the multiple roof ventilation channels 50 is not obstructed by the multiple beams 20, so there is no need to form ventilation paths in at least the roof material 11 to bypass the beams, as in the above-described building. In other words, there is no need to provide notches in the roof material 11. In this way, in the building 1, there is no need to form notches in the roof material 11, which improves the strength of the roof material 11 and also makes construction easier, such as addressing leaks.

[0072] Furthermore, in the building 1 according to this embodiment, the second support member 32 has multiple cutouts 32C as openings, so even if the second support member 32 is interposed between the multiple roof ventilation ducts 50 and the roof exhaust duct 375 of the protruding portion 300 in the first direction, air passes through the second support member 32 in the first direction via the multiple cutouts 32C and reaches the roof exhaust duct 375 of the protruding portion 300. In this way, in the building 1, the second support member 32 is prevented from obstructing the flow of air from the multiple roof ventilation ducts 50 to the protruding portion 300.

[0073] Furthermore, in the building 1 according to this embodiment, a roof moisture-proof line 70 is disposed along the underside 40b of the roof-side first insulating member 40, and a ceiling member 100 is disposed below the roof-side first insulating member 40 at a distance so as to form a ceiling space S3 between the roof-side first insulating member 40 and the ceiling member 100. This structure allows for a larger ceiling space S3 between the roof-side first insulating member 40 and the ceiling member 100 in the vertical direction compared to a structure in which a moisture-proof line is disposed on the upper surface of the ceiling member and an insulating member is disposed on the upper surface of the moisture-proof line. Because the ceiling space S3 is located below the roof-side first insulating member 40 and the roof moisture-proof line 70, a temperature and humidity environment substantially equivalent to that of the second indoor space RM2 is achieved in the ceiling space S3. In this embodiment, the ceiling space S3 is formed so widely that it can be used as a location for refrigerant piping and other equipment prone to summer-type condensation. This improves the functionality of the building 1.

[0074] Furthermore, in the building 1 according to this embodiment, the roof-side first insulation member 40 is disposed above the roof moisture-proof line 70, and therefore the roof-side first insulation member 40 can prevent the roof moisture-proof line 70 from being cooled by outside air passing through the roofing material 11, for example in winter. As a result, even if humid air from the second indoor space RM2 passes from the second indoor space RM2 through the ceiling member 100 and reaches the roof moisture-proof line 70, this air is less likely to be cooled, and condensation is less likely to occur. In other words, the above-mentioned configuration prevents the occurrence of so-called winter condensation, maintains a good environment in the formed attic space S3, and can maintain an environment equivalent to that of the indoor space.

[0075] Furthermore, in the building 1 according to this embodiment, the roof-side second insulating member 80 is disposed below the roof moisture-proof line 70. In other words, the roof-side second insulating member 80 is disposed below the roof-side first insulating member 40 so as to sandwich the roof moisture-proof line 70 from above and below. Therefore, the roof-side second insulating member 80 can prevent the roof moisture-proof line 70 from being cooled by air from the second indoor space RM2, which is cooled in the summer by an air conditioning unit installed in the second indoor space RM2 and passes through the ceiling member 100. As a result, even if humid outside air passes through the roof material 11 from the outdoor space OS and reaches the roof moisture-proof line 70, the outside air is not easily cooled, and condensation is unlikely to occur. In other words, the above-described configuration prevents the occurrence of so-called summer condensation, maintains a good environment in the formed attic space S3, and maintains an environment equivalent to that of the indoor space.

[0076] Furthermore, in the building 1 according to this embodiment, the wall-side second insulating member 180 has an upper surface (second insulating upper surface) 180a that is substantially flush with the bottom surface 32b of the cutout 32C of the second support member 32 in the first direction. Therefore, air flowing from the multiple roof ventilation passages 50 toward the roof exhaust passage 375 of the protruding portion 300 can pass above the wall-side second insulating member 180 and flow into the roof exhaust passage 375. In other words, in this embodiment, the wall-side second insulating member 180 is prevented from obstructing the flow of air from the multiple roof ventilation passages 50 to the roof exhaust passage 375 of the protruding portion 300.

[0077] Furthermore, in the building 1 according to this embodiment, the upper part of the other side surface of the first support member 31 in the first direction is covered by the first auxiliary insulating member 60, and the other side surface is covered from the center to the bottom in the vertical direction by the roof-side first insulating member 40. This prevents the first support member 31 from being cooled or heated by the air present in the multiple roof ventilation channels 50.

[0078] [Modified embodiment] Although the building according to the present invention has been described above, the present invention is not limited to the above-described embodiment. For example, the building 1 according to the above-described embodiment can be modified as follows.

[0079] (1) Fig. 5 is a front cross-sectional view of a building 1A according to a first modified embodiment of the present disclosure. Fig. 6 is a plan cross-sectional view of a building 1A according to a first modified embodiment of the present disclosure. Note that Fig. 5 is a cross-sectional view taken along line VV in Fig. 6. In Figs. 5 and 6, components having the same functions as those in the previous embodiment are denoted by the same reference numerals as in Figs. 1 and 2. Here, differences from the previous embodiment will be mainly described.

[0080] As shown in FIGS. 5 and 6, the multiple beams 20A according to this modified embodiment are composed of a first beam 201A to a sixth beam 206A. As shown in FIG. 5, the first beam 201A and the second beam 202A are spaced apart in the first direction and extend in the second direction. In this modified embodiment, the first beam 201A is disposed on one side of the second beam 202A in the first direction. As shown in FIG. 6, the third beam 203A extends in the first direction to connect the ends of the first beam 201A and the second beam 202A on one side in the second direction. The fourth beam 204A is disposed on the other side of the third beam 203A in the second direction and extends in the first direction to connect the first beam 201A and the second beam 202A. The fifth beam 205A is disposed on the other side of the fourth beam 204A in the second direction, and extends in the first direction so as to connect the first beam 201A and the second beam 202A. The sixth beam 206A is disposed on the other side of the fifth beam 205A in the second direction, and extends in the first direction so as to connect the other ends of the first beam 201A and the second beam 202A in the second direction.

[0081] The multiple support members 30A according to this modified embodiment are composed of a first support member 301A to a seventh support member 307A. As shown in FIG. 5, the first support member 301A to the fifth support member 305A are spaced apart from one another in the first direction and extend in the second direction. The first support member 301A to the fifth support member 305A according to this modified embodiment are arranged in the following order from one side to the other in the first direction: first support member 301A, second support member 302A, third support member 303A, fourth support member 304A, and fifth support member 305A. As shown in FIG. 6, the first support member 301A is arranged on the upper surface 201a of the first beam 201A. Each of the second support member 302A, the third support member 303A, and the fourth support member 304A has a portion disposed on the upper surface 203a of the third beam 203A, a portion disposed on the upper surface 204a of the fourth beam 204A, a portion disposed on the upper surface 205a of the fifth beam 205A, and a portion disposed on the upper surface 206a of the sixth beam 206A. The fifth support member 305A is disposed on the upper surface 202a of the second beam 202A. The sixth support member 306A and the seventh support member 307A are disposed at intervals from each other in the second direction. The sixth support member 306A is disposed on the upper surface 203a of the third beam 203A and extends in the first direction so as to connect the ends of the first support member 301A to the fifth support member 305A on one side in the second direction. The seventh support member 307A is disposed on the upper surface 206a of the sixth beam 206A, and extends in the first direction so as to connect the other ends of the first support member 301A to the fifth support member 305A in the second direction.

[0082] The above-mentioned first support member 301A to seventh support member 307A each have an upper end portion 30a that supports the roof material 11 from below and forms a beam space S2 in the vertical direction between the roof-side first insulation member 40 and multiple beams 20A.

[0083] As in the previous embodiment, multiple roof ventilation channels 50A are formed between the upper surface 40a of the first roof-side insulation member 40 and the roof material 11 in the vertical direction. In this modified embodiment, the multiple roof ventilation channels 50A are composed of a first roof ventilation channel 501A, a second roof ventilation channel 502A, a third roof ventilation channel 503A, and a fourth roof ventilation channel 504A. As shown in FIG. 6 , the first roof ventilation channel 501A is formed between the first support member 301A and the second support member 302A in the first direction. The second roof ventilation channel 502A is formed between the second support member 302A and the third support member 303A in the first direction. The third roof ventilation channel 503A is formed between the third support member 303A and the fourth support member 304A in the first direction. The fourth roof ventilation channel 504A is formed between the fourth support member 304A and the fifth support member 305A in the first direction. As shown by arrows A9 to A16 in Fig. 6, in the first roof ventilation duct 501A to the fourth roof ventilation duct 504A, air flows to at least one side or the other side in the second direction. Furthermore, as shown by arrows A17 to A19 in Fig. 6, in the fourth roof ventilation duct 504A, a portion of the air flows to the other side in the first direction.

[0084] The fifth support member 305A according to this modified embodiment has an opening that allows some of the air in the fourth roof ventilation channel 504A to pass through the fifth support member 305A in the first direction. Specifically, the fifth support member 305A has three notches that are formed by cutting downward the upper surface of the fifth support member 305A and are spaced apart in the second direction. These notches function as air outlets EX for the fourth roof ventilation channel 504A.

[0085] The sixth support member 306A has openings that allow air from the first roof ventilation duct 501A to the fourth roof ventilation duct 504A to pass through the sixth support member 306A in the second direction. Specifically, the sixth support member 306A has four notches that are formed by cutting downward the upper surface of the sixth support member 306A and are spaced apart in the first direction. These notches function as air outlets EX for the first roof ventilation duct 501A to the fourth roof ventilation duct 504A.

[0086] The seventh support member 307A has an opening similar to the opening of the sixth support member 306A described above, namely, four notches that allow the air from the first roof ventilation duct 501A to the fourth roof ventilation duct 504A to pass through the seventh support member 307A in the second direction and function as outlets EX for the air from the first roof ventilation duct 501A to the fourth roof ventilation duct 504A.

[0087] Although detailed illustrations are omitted, the building 1A according to this modified embodiment further includes a one-side protrusion and an other-side protrusion in addition to the protrusion 300 described in the previous embodiment. The one-side protrusion is a parapet rising from one end of the roof material 11 in the second direction and extending in the first direction. The one-side protrusion has a one-side exhaust passage that connects the multiple roof ventilation passages 50A to the outdoor space OS so that air that has passed through the sixth support member 306A in the second direction can be discharged to the outdoor space OS. The other-side protrusion is a parapet rising from the other end of the roof material 11 in the second direction and extending in the first direction. The other-side protrusion has a other-side exhaust passage that connects the multiple roof ventilation passages 50A to the outdoor space OS so that air that has passed through the seventh support member 307A in the second direction can be sent to the outdoor space OS.

[0088] The building 1A having the above configuration can also achieve the same effects as the building 1 according to the previous embodiment.

[0089] Furthermore, the building 1A according to this modified embodiment can exhaust air from the attic space S1 in three directions. Specifically, the building 1A has first roof ventilation ducts 501A through 503A, which allow air from the attic space S1 to flow to both sides in the second direction, and a fourth roof ventilation duct 504A, which allows air from the attic space S1 to flow to both sides in the second direction and to the other side in the first direction. Air that flows through these roof ventilation ducts 50A to either both sides in the second direction or the other side in the first direction reaches the roof exhaust duct 375 of the protrusion 300, the one-side exhaust duct of the one-side protrusion, or the other-side exhaust duct of the other-side protrusion, and is then exhausted to the outdoor space OS. This allows air from the attic space S1 to be exhausted more efficiently.

[0090] (2) In the previous embodiment, the wall exhaust passage 315 and the roof exhaust passage 375 are separated in the first direction, and the air flowing through the wall exhaust passage 315 and the air flowing through the roof exhaust passage 375 are independent of each other. However, the air flowing through the wall exhaust passage 315 and the air flowing through the roof exhaust passage 375 may merge. The following description will be made with reference to FIGS. 7 and 8. FIG. 7 is a front cross-sectional view of a protrusion 600 according to a second modified embodiment of the present disclosure. FIG. 8 is a front cross-sectional view of a protrusion 700 according to a third modified embodiment of the present disclosure. Note that in FIGS. 7 and 8, components having the same functions as those in the previous embodiment are denoted by the same reference numerals as in FIG. 4. Here, the following description will focus on the differences from the previous embodiment.

[0091] The protrusion 600 shown in FIG. 7 has a plurality of partition members 601, a guide member 602, and a protrusion-side base material 604.

[0092] The partition members 601 are arranged on one side of the protrusion outer wall 310 in the first direction so as to form a wall exhaust path 315 between them and the protrusion outer wall 310 in the first direction, and are spaced apart from each other in the vertical direction.

[0093] Guide member 602 has a main body portion that forms merged flow path 603. As indicated by arrow A20 in Fig. 7, merged flow path 603 utilizes the spaces between multiple partition members 601 in the vertical direction to merge air flowing through roof exhaust path 375 with air flowing through wall exhaust path 315. Although not shown in detail, an updraft is formed in wall exhaust path 315, causing air to flow upward.

[0094] The protrusion-side base material 604 is disposed between the protrusion inner wall 370 and the plurality of partition members 601 in the first direction, and forms a roof exhaust passage 375 between the protrusion inner wall 370 and the protrusion-side base material 604. The protrusion-side base material 604 has a base material opening 604M that allows the above-mentioned merging passage 603 to pass through the protrusion-side base material 604 in the first direction.

[0095] The protrusion 600 having the above configuration allows the air flowing through the wall exhaust duct 315 and the air flowing through the roof exhaust duct 375 to merge. In this way, the air present in the multiple roof ventilation ducts 50 can be drawn into the ascending air current of the wall exhaust duct 315 via the roof exhaust duct 375. As a result, the air present in the multiple roof ventilation ducts 50 can be efficiently discharged into the outdoor space OS together with the ascending air current.

[0096] 8 can also be adopted from the viewpoint of joining the air flowing through the wall exhaust passage 315 and the air flowing through the roof exhaust passage 375. A base material opening 701M is formed in the protrusion-side base material 701 of the protrusion 700 shown in FIG. 8, which allows the air flowing through the roof exhaust passage 375 to pass through the protrusion-side base material 701 in the first direction and to join the air flowing through the wall exhaust passage 315.

[0097] (3) FIG. 9 is a front cross-sectional view of a protrusion 800 according to a fourth modified embodiment of the present disclosure. Instead of the protrusion 300 according to the previous embodiment, the building 1 may include the protrusion 800 shown in FIG. 9. As shown in FIG. 9, the protrusion 800 according to this modified embodiment includes an extension wall 801, an intermediate wall 802, and a separate guide member 803. The extension wall 801 has a lower end connected to the upper end of the protrusion inner wall 370 and extends in the vertical direction. The intermediate wall 802 is disposed between the extension wall 801 and the one-side convex portion 392 of the cover member 390 in the first direction. The intermediate wall 802 forms a gap GA between the extension wall 801 in the first direction, through which air flows in the vertical direction, and also forms a third gap G3 between the one-side convex portion 392 in the first direction. Although not shown in detail, an updraft, through which air flows upward, is formed in the gap GA. The separate guide member 803 has a main body portion that forms a guide path 804 that connects the roof exhaust path 375 with the gap GA, thereby guiding the air flowing through the roof exhaust path 375 to the gap GA, and is attached to the extension wall 801.

[0098] As shown by arrow A21 in Figure 9, at the protrusion 800, the air that flows through the roof exhaust passage 375 merges with the rising air current formed in the gap GA through the guide path 804 of the separate guide member 803, flows from the gap GA to the under-cover space P and the third gap G3, and is discharged into the outdoor space OS.

[0099] In a building provided with the protrusion 800 having the above-described configuration, the same effects as those of the building 1 according to the previous embodiment can be obtained.

[0100] Furthermore, in a building equipped with the protrusion 800 having the above-described configuration, the air present in the multiple roof ventilation ducts 50 can be drawn into the rising air current in the gap GA via the roof exhaust duct 375. In this way, the air present in the multiple roof ventilation ducts 50 can be efficiently discharged together with the rising air current into the outdoor space OS.

[0101] (4) In the previous embodiment, the building 1 was described as being equipped with the roof-side second insulating member 80, but the roof-side second insulating member 80 is not essential. However, from the viewpoint of suppressing the occurrence of so-called summer condensation, it is preferable that the building 1 be equipped with the roof-side second insulating member 80.

[0102] (5) In the previous embodiment, the roof-side first insulating member 40, the roof-side second insulating member 80, the first auxiliary insulating member 60, the second auxiliary insulating member 90, the wall-side first insulating member 140, and the wall-side second insulating member 180 were described as being made of a hard insulating material such as extruded polystyrene foam. However, these may also be made of a fiber-based insulating material such as cellulose fiber, rock wool, or glass wool. Furthermore, each of the above insulating members may be made of urethane foam such as phenolic foam. Furthermore, each of the above insulating members may be installed by spraying it onto the building 1.

[0103] (6) In the previous embodiment, an example was described in which the first roof ventilation duct 51 to the sixth roof ventilation duct 56 are formed in the building 1, but there may be only one roof ventilation duct. In other words, in the building 1 according to the previous embodiment, the fourth support member 34 to the eighth support member 38 are not required, and a single roof ventilation duct may be formed inside the first support member 31, the second support member 32, the third support member 33, and the fourth support member 34.

[0104] (7) The present invention is not limited to the roof structure described above. It can be applied to known roof balconies, full-flat balconies, etc. In this case, the structure of the part that connects the roof ventilation channel and the protruding exhaust channel may be modified as appropriate.

[0105] (8) In the previous embodiment, an example was described in which the wall exhaust passage 315 indirectly connects the wall ventilation passage 115 and the outdoor space OS, but the wall exhaust passage 315 may connect the wall ventilation passage 115 and the outdoor space OS directly. In other words, the wall exhaust passage 315 may be interposed between the wall ventilation passage 115 and the outdoor space OS so that air flows from the wall ventilation passage 115 to the wall exhaust passage 315 without passing through other spaces, and so that air flows from the wall exhaust passage 315 to the outdoor space OS without passing through other spaces.

[0106] Furthermore, in the above embodiment, an example was described in which the roof exhaust duct 375 indirectly connects the multiple roof ventilation ducts 50 to the outdoor space OS, but the roof exhaust duct 375 may also directly connect the multiple roof ventilation ducts 50 to the outdoor space OS. In other words, the roof exhaust duct 375 may be interposed between the multiple roof exhaust ducts 375 and the outdoor space OS so that air flows from the multiple roof ventilation ducts 50 to the roof exhaust duct 375 without passing through other spaces, and so that air flows from the roof exhaust duct 375 to the outdoor space OS without passing through other spaces.

[0107] (9) In the previous embodiment, an example was described in which multiple support members 30 were arranged on the upper surfaces of multiple beams 20. That is, an example was described in which multiple support members 30 and multiple beams 20 abutted against each other. However, the multiple support members 30 and multiple beams 20 do not necessarily have to abut against each other. The multiple support members 30 only need to be arranged above (above, above) the multiple beams 20 as long as an above-beam space S2 between the roof material 11 and the multiple beams 20 in the vertical direction can be formed between the roof material 11 and the multiple beams 20. Therefore, for example, a predetermined member may be interposed between the multiple support members 30 and the multiple beams 20 in the vertical direction.

[0108] (10) In the previous embodiment, an example was described in which the multiple support members 30 were configured from the first support member 31 to the ninth support member 39. However, the configuration of the multiple support members 30 is not limited to this and can be modified as appropriate. For example, the multiple support members 30 may include a first separate support member and a second separate support member instead of the first support member 31 and the second support member 32. The first separate support member is disposed between the third support members 33 to ninth support members 39 and the first beam 21 in the vertical direction so as to support one end of each of the third support members 33 to ninth support members 39 in the first direction from below, and extends in the second direction. The second separate support member is disposed between the third support members 33 to ninth support members 39 and the third beam 23 in the vertical direction so as to support the other end of each of the third support members 33 to ninth support members 39 in the first direction from below, and extends in the second direction. In this example, the third support member 33 to the ninth support member 39 correspond to the "plurality of support members" according to the present invention.

[0109] In a building having the above configuration, the same effects as those of the building 1 according to the previous embodiment can be obtained.

[0110] (11) The building 1 may not include some of the components described in the previous embodiment. For example, the building 1 may not include the frame 210. In addition, the configuration of the building 1 may be modified as appropriate without departing from the spirit of the present invention.

[0111] The above-described specific embodiments mainly include inventions having the following configurations.

[0112] A building according to a first aspect of the present invention includes a roofing material extending in a horizontal direction, side wall portions extending in the vertical direction so as to define wall ventilation channels through which air flows in the vertical direction, protrusions arranged to protrude upward from the roofing material and connecting the roofing material to the side wall portions, a plurality of beams arranged below the roofing material and extending in at least one of a horizontal first direction and a horizontal second direction intersecting both the first direction and the vertical direction, and each beam has an upper end portion supporting the roofing material from below so as to form a space between the roofing material and the plurality of beams in the vertical direction, and each beam is arranged on the plurality of beams and extends in at least one of the first direction and the second direction. and a first insulating member surrounded by the plurality of support members, the first insulating member having an upper surface spaced below the roof material so as to form a roof ventilation channel between the roof material and the roof material in the space, through which air flows in at least one of the first direction and the second direction, the roof ventilation channel having an air inlet, an air outlet, and a connecting channel connecting the air inlet and the air outlet, the section from the air inlet to the air outlet being arranged between the roof material and the first insulating member in the vertical direction, and the protrusion has exhaust channels connecting each of the outlet of the roof ventilation channel and the outlet of the wall ventilation channel to an outdoor space.

[0113] A second invention is that in a building according to the first invention, at least some of the plurality of support members may have openings formed therein that allow air flowing through the roof ventilation passage to pass through the support members.

[0114] A third invention may be a building according to the first or second invention, further comprising a ceiling member arranged at a distance below the first insulating member to form an attic space between the ceiling member and the first insulating member in the vertical direction and to separate the attic space from the indoor space below the attic space, and a roof moisture-proof line arranged along the underside of the first insulating member to prevent moisture that has passed through the ceiling member from the indoor space from reaching the first insulating member.

[0115] A fourth invention may be such that, in a building according to any one of the first to third inventions, the building further comprises a second insulating member arranged below the first insulating member so as to sandwich the roof moisture-proof line from above and below between the second insulating member and the first insulating member. [Explanation of symbols]

[0116] 1, 1A: Building 11: Roofing materials 20, 20A: Multiple beams 30, 30A: Multiple support members 30a: Upper end 32C: Notch 40: Roof-side first insulating member (an example of a first insulating member) 40a:Top surface 40b: Bottom surface 50: Multiple roof ventilation channels 70: Roof moisture-proof line 80: Roof side second insulating member (an example of the third insulating member) 100: Ceiling material 110: Side wall 115: Wall ventilation channel 315: Wall exhaust channel (an example of an exhaust channel) 375: Roof exhaust duct (example of exhaust duct) EN:Air inlet EX: Air outlet CN: Connection OS:Outdoor space RM2: Second interior space (example of an interior space) S1: Attic space S2:Beam space S3: Ceiling space

Claims

1. A roofing material extending in a horizontal direction; a side wall portion extending in the vertical direction so as to define a wall ventilation passage through which air flows along the vertical direction; a protrusion disposed so as to protrude upward from the roof material and connecting the roof material and the side wall portion; a plurality of beams disposed below the roof material and extending in at least one of a horizontal first direction and a horizontal second direction intersecting each of the first direction and the vertical direction; a plurality of support members each having an upper end portion that supports the roof material from below so as to form a space between the roof material and the plurality of beams in the vertical direction, the support members being arranged on the plurality of beams and extending in at least one of the first direction and the second direction; a first insulating member having an upper surface disposed below the roof material at a distance so as to form a roof ventilation passage between the first insulating member and the roof material of the space, through which air flows in at least one of the first direction and the second direction, and surrounded by the plurality of support members; The roof ventilation channel has an air inlet, an air outlet, and a connecting channel connecting the air inlet and the air outlet, and the section from the air inlet to the air outlet is disposed between the roof material and the first insulating member in the vertical direction, The protrusion has an exhaust passage that communicates each of the outlet of the roof ventilation passage and the outlet of the wall ventilation passage with an outdoor space. building.

2. At least some of the support members among the plurality of support members have openings formed therein that allow air flowing through the roof ventilation channel to pass through the support members. The building of claim 1.

3. a ceiling member that forms a ceiling space between itself and the first insulating member in the vertical direction and is arranged below the first insulating member at a distance so as to separate the ceiling space from an indoor space below the ceiling space; The roof moisture-proof line is arranged along the underside of the first insulation member and prevents moisture that has passed through the ceiling member from the indoor space from reaching the first insulation member.

3. The building according to claim 1 or 2.

4. The roof moisture barrier line is further provided with a second insulating member disposed below the first insulating member so as to sandwich the roof moisture barrier line between the first insulating member and the second insulating member from above and below. The building according to claim 3.

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