Roof base structure

Abstract

To provide a roof substrate structure which prevents the roof appearance from being spoiled by an eaves ventilation port.SOLUTION: A roof substrate structure 1 includes a roofing board 2, a waterproof sheet 3 disposed on the roofing board 2, a muntin 4 disposed on the waterproof sheet 3, a cross rail 5 disposed on the muntin 4, an eaves ventilation member 5 having an eaves ventilation port 51, an upper ventilation port 6 leading to the eaves ventilation port 51, a lower draining member 7 disposed below the eaves ventilation port 51, and a front draining member 8 disposed at the front side of the eaves ventilation port 51.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a roof underlayment structure. More particularly, the present invention relates to a roof underlayment structure having an eaves ventilation opening. [Background technology]

[0002] Patent Document 1 describes a highly insulated building that utilizes a double roof. In this highly insulated building, a roof-side ventilation layer that allows air to flow is formed between the upper roof sheathing board and the moisture-permeable windproof and waterproof sheet on the upper side of the lower roof sheathing board. The roof-side ventilation layer is formed so that outside air can flow in through an eaves soffit ventilation opening formed below the eaves part of the upper roof sheathing board, and so that air in the roof-side ventilation layer can be discharged through a ridge ventilation opening formed at the upper end of the roof. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-169566 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the highly insulated building of Patent Document 1, the eaves vents are formed in the eaves ceiling, so that the eaves vents are visible from below, which can mar the appearance of the roof.

[0005] The present invention has been made in consideration of the above-mentioned reasons, and aims to provide a roof foundation structure in which the appearance of the roof is less likely to be marred by eaves ventilation openings. [Means for solving the problem]

[0006] A roof underlayment structure according to one embodiment of the present invention comprises a sheathing board, a waterproof sheet placed on the sheathing board, vertical bars placed on the waterproof sheet, horizontal bars placed on the vertical bars, an eaves ventilation member having an eaves ventilation opening, an upper ventilation opening communicating with the eaves ventilation opening, a bottom drain member located below the eaves ventilation opening, and a front drain member located in front of the eaves ventilation opening. The front drainage member extends vertically downward from the base to the tip, and the bottom drainage member extends diagonally downward from the base so that the tip of the bottom drainage member faces the tip of the front drainage member. Effect of the Invention

[0007] According to the present invention, there is an advantage that the eaves ventilation opening is made less visible by the bottom drainage member and the front drainage member, so that the appearance of the roof is less likely to be marred. [Brief description of the drawings]

[0008] [Figure 1] Fig. 1A is a cross-sectional view showing a roof foundation structure according to the present invention, and Fig. 1B is a cross-sectional view showing an eaves portion of the roof foundation structure according to the present invention. [Diagram 2] Fig. 2A is a cross-sectional view showing a ridge portion of the roof foundation structure according to the present invention. Fig. 2B is a cross-sectional view showing a corner ridge portion of the roof foundation structure according to the present invention. [Diagram 3] 3A and 3B are cross-sectional views showing a ridge portion and a valley portion of a roof foundation structure according to the present invention, respectively. [Figure 4] 4A and 4B are cross-sectional views showing a wall joint portion of a roof foundation structure according to the present invention. [Diagram 5] 5A to 5C are perspective views showing the construction sequence of the roof foundation structure according to the present invention. [Figure 6] 6A to 6C are perspective views showing the construction sequence of the roof foundation structure according to the present invention. [Figure 7] Fig. 7A is a perspective view showing a corner ridge portion of the roof foundation structure according to the present invention in a constructed state. Fig. 7B is a cross-sectional view showing a corner ridge portion of the roof foundation structure according to the present invention in a constructed state. [Figure 8]Fig. 8A is a perspective view showing a construction state of a valley portion of a roof foundation structure according to the present invention, and Fig. 8B is a cross-sectional view showing a construction state of a valley portion of a roof foundation structure according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (Embodiment) (1) Overview The roof foundation structure 100 according to this embodiment includes a sheathing board 1, a waterproof sheet 2, vertical battens 3, horizontal battens 4, an eaves ventilation member 5, an upper ventilation opening 6, a bottom drainage member 7, and a front drainage member 8 (see Figs. 1A and 1B). In the roof foundation structure 100, a roof material 9 is installed on the horizontal battens 4 to form a roof 101.

[0010] The eaves ventilation member 5 has an eaves ventilation opening 51. The sewer drain member 7 is located below the eaves ventilation opening 51. The front drain member 8 is located in front of the eaves ventilation opening 51. Therefore, the eaves ventilation opening 51 is difficult to see from the range extending from below to the front of the roof 101 due to the sewer drain member 7 and the front drain member 8. Therefore, the appearance of the roof 101 is less likely to be damaged. In addition, the sewer drain member 7 blocks rainwater blowing up from below toward the eaves ventilation opening 51, and the front drain member 8 blocks rainwater blowing from the front toward the eaves ventilation opening 51, making it difficult for rainwater to seep into the eaves ventilation opening 51.

[0011] In addition, in the roof underlayment structure 100 according to this embodiment, it is preferable that the interval between the drainage member 7 and the front drainage member 8 is gradually narrowed in the direction from the base of the drainage member 7 and the front drainage member 8 toward the tip. In this case, the eaves vent 51 becomes even less visible through the gap between the drainage member 7 and the front drainage member 8, and the deterioration of the appearance of the roof 101 can be further suppressed. In addition, rainwater penetrates into the wide space between the drainage member 7 and the front drainage member 8 through the narrow space between the tip of the drainage member 7 and the tip of the front drainage member 8, and the rainwater is easily stalled due to a sudden reduction in pressure, so that the penetration of rainwater into the eaves vent 51 is further reduced, and the waterproofness of the roof 101 is improved.

[0012] In addition, the roof foundation structure 100 according to this embodiment preferably includes a gutter portion 10 extending in the longitudinal direction of the vertical beams 3 in the eaves 102. In this case, water can be drained through the gutter portion 10, improving the waterproofing of the roof 101.

[0013] In this specification, "forward" means the direction of the roof foundation structure 100 and the roof 101 toward the outdoors. The direction toward the outdoors is the direction away from the attic of the roof 101. For example, the forward direction of the eaves vent 51 means the direction toward the outdoors as viewed from the eaves vent 51 (the direction away from the attic).

[0014] (2) Details 1A and 1B, the roof foundation structure 100 according to this embodiment includes a sheathing board 1, a waterproof sheet 2, vertical battens 3, horizontal battens 4, an eaves ventilation member 5, an upper ventilation opening 6, a bottom drainage member 7, and a front drainage member 8. In the roof foundation structure 100, a plurality of roof materials 9 are installed on the horizontal battens 4 to form a roof 101.

[0015] The sheathing board 1 is a plate-like member that is fixed onto the rafters 104, and is made of, for example, plywood.

[0016] The waterproof sheet 2 is a sheet-like member placed on the sheathing board 1, and a moisture-permeable roofing material can be used. The moisture-permeable roofing material meets the standard of JIS A 6111 "Moisture-permeable waterproof sheet for roofs." Although a non-moisture-permeable asphalt roofing material can also be used for the waterproof sheet 2, using a moisture-permeable waterproof sheet 2 makes it difficult for moisture to accumulate in the attic space of the roof, etc., and reduces deterioration of the roof.

[0017] The vertical bars 3 are components fixedly arranged on the waterproof sheet 2. The vertical bars 3 have a shape that extends in the direction of the roof slope (e.g., the eaves ridge direction) and are made of wood or plastic. A plurality of vertical bars 3 are provided on the waterproof sheet 2. The multiple vertical bars 3 are aligned on the waterproof sheet 2 in a direction perpendicular to the direction of the roof slope. The multiple vertical bars 3 are arranged at intervals between the rafters 104 and along the longitudinal direction of the rafters 103.

[0018] The horizontal beams 4 are components that are fixed onto the vertical beams 3 with screws or the like. The horizontal beams 4 have a shape that extends in a direction perpendicular to the direction of the roof slope, and are made of wood or plastic material. A number of horizontal beams 4 are provided on the vertical beams 3. The multiple horizontal beams 4 are arranged at intervals corresponding to the roofing feet of the roof material 9. Each horizontal beam 4 is arranged to span multiple vertical beams 3.

[0019] The roofing material 9 is a component that is fixed and placed on the horizontal battens 4. The roofing material 9 can be a ceramic roofing material whose main component is hardened cement or a metal roofing material. The roofing material 9 can be fixed to the horizontal battens 4 with fasteners 109 such as screws. Multiple roofing materials 9 are placed on the horizontal battens 4. Adjacent roofing materials 9 in the direction of the roof slope are placed with approximately half of them overlapping. The multiple roofing materials 9 are placed over the entire roof 101, covering the sheathing boards 1, waterproof sheet 2, vertical battens 3, and horizontal battens 4.

[0020] The roofing material 9 is disposed opposite the waterproof sheet 2, and the space between the roofing material 9 and the waterproof sheet 2 is formed as an air passage 105. The air passage 105 is formed along the direction of the roof slope. Moisture that passes through the waterproof sheet 2 enters the air passage 105. The air passage 105 is formed so as to continue from the eaves ventilation opening 51 to the upper ventilation opening 6. Therefore, the air that flows into the air passage 105 from the eaves ventilation opening 51 flows through the air passage 105, reaches the upper ventilation opening 6, and is discharged from the upper ventilation opening 6.

[0021] The eaves ventilation member 5 is a metal member such as an aluminum zinc-plated steel plate, and is formed with a cross section in a substantially L-shape. The eaves ventilation member 5 is formed so as to extend along the eaves direction. The upper part of the eaves ventilation member 5 is disposed between the roof material 9 and the horizontal bar 4 and fixed to the horizontal bar 4. The lower part of the eaves ventilation member 5 is located in front (outdoor side) of the eaves side end of the sheathing board 1. An eaves ventilation opening 51 is formed in the lower part of the eaves ventilation member 5. The eaves ventilation opening 51 is a hole that penetrates the lower part of the eaves ventilation member 5 in the thickness direction, and multiple eaves ventilation openings 51 are provided along the eaves direction. The eaves ventilation opening 51 can be formed, for example, as a long hole extending in the vertical direction. The eaves ventilation opening 51 is disposed opposite the eaves side end of the air passage 105.

[0022] The drainage member 7 is a member made of metal such as an aluminum zinc-plated steel plate. The upper part of the drainage member 7 is disposed between the sheathing board 1 and the vertical battens 3 and fixed to the eaves side end of the sheathing board 1. The lower part of the drainage member 7 is located forward (outdoor side) of the eaves side end of the sheathing board 1 and is located below the lower end of the eaves ventilation member 5. The lower part of the drainage member 7 is inclined downwardly when viewed from the eaves side end of the sheathing board 1. Since the lower part of the drainage member 7 is located below the eaves ventilation opening 51, the eaves ventilation opening 51 can be made difficult to see from below, and the drainage member 7 can block rainwater blowing up from below toward the eaves ventilation opening 51, thereby reducing the infiltration of rainwater from the eaves ventilation opening 51 into the air passage 105.

[0023] Here, the position in the horizontal direction of the tip (lower end) of the drainage member 7 is approximately the same as or slightly forward of the position of the upper end of the eaves ventilation opening 51. In other words, assuming an imaginary vertical upward line passing through the tip of the drainage member 7, the upper end of the eaves ventilation opening 51 is located above the imaginary vertical upward line, or is located slightly toward the eaves. This allows the drainage member 7 to fully cover the eaves ventilation opening 51 from below, fully exerting the effects of making it less visible and reducing the infiltration of rainwater.

[0024] The front water drainage member 8 is a member made of metal such as an aluminum zinc-plated steel plate. The upper part of the front water drainage member 8 is disposed between the roof material 9 and the cross beam 4 and fixed to the cross beam 4. The lower part of the front water drainage member 8 is located forward (toward the outside) of the eaves ventilation member 5 and is located opposite the eaves ventilation opening 51. The tip (lower end) of the front water drainage member 8 is located below the lower end of the eaves ventilation member 51. Since the lower part of the front water drainage member 8 is located forward of the eaves ventilation opening 51, the eaves ventilation opening 51 can be made difficult to see from the front, and the front water drainage member 8 can block rainwater blowing from the front toward the eaves ventilation opening 51, thereby reducing the infiltration of rainwater from the eaves ventilation opening 51 into the air passage 105.

[0025] Here, it is preferable that the height of the tip (lower end) of the sewer drainage member 7 and the tip (lower end) of the front drainage member 8 are approximately the same. In this case, the tip of the sewer drainage member 7 and the tip of the front drainage member 8 are arranged side by side in the horizontal direction, and the infiltration of rainwater between the tip of the sewer drainage member 7 and the tip of the front drainage member 8 can be reduced.

[0026] The distance between the drainage member 7 and the front drainage member 8 is gradually narrowed in the direction from the base to the tip. In this case, for example, the front drainage member 8 extends almost vertically downward from the base (the portion located in front of the cross rail 4) to the tip, and the drainage member 7 extends diagonally downward from the base (the portion located in front of the eaves side end of the sheathing board 1) so that the tip of the drainage member 7 faces the tip of the front drainage member 8.

[0027] If the distance between the drainage member 7 and the front drainage member 8 is configured to gradually narrow in the direction from the base to the tip in this way, the eaves ventilation opening 51 becomes even more difficult to see through the gap between the drainage member 7 and the front drainage member 8. In addition, rainwater will seep from the narrow space between the tip of the drainage member 7 and the tip of the front drainage member 8 into the wide space between the drainage member 7 and the front drainage member 8, and the rainwater will be subject to a sudden reduction in pressure and will easily lose speed.

[0028] An eaves gutter 107 is disposed below the tip of the sewer drain member 7 and the tip of the front drain member 8. The eaves gutter 107 is disposed so as to extend along the eaves direction. The eaves gutter 107 is fixed to and supported by an eaves gutter mounting fixture 108 attached to the fascia board 106. The eaves gutter 107 is located diagonally below and in front of (on the outdoor side of) the eaves ventilation opening 51, so the eaves gutter 107 blocks rainwater and reduces its infiltration into the eaves ventilation opening 51.

[0029] The upper ventilation opening 6 is a ventilation opening located at a higher position than the eaves ventilation opening 51, and as shown in Fig. 1A, it can be provided, for example, at the ridge portion of the roof 101. The upper ventilation opening 6 is connected to the upper end portion (the end portion opposite to the eaves side end portion) of the ventilation passage 105, so that the eaves ventilation opening 51 and the upper ventilation opening 6 are connected via the ventilation passage 105.

[0030] FIG. 2A shows the eaves 102 of the roof 101. The eaves 102 is provided with a gutter section 10. The gutter section 10 is formed in a U-shape with an open top, and is disposed below the eaves side end of the roofing material 9. The gutter section 10 is also formed so as to extend along the eaves 102. The gutter section 10 is formed as a part of the eaves discarding water trim 110. One end of the eaves discarding water trim 110 is located between the roofing material 9 and the cross beam 4, and is fixed to the cross beam 4 with a screw or the like. The other end of the eaves discarding water trim 110 is formed at the upper end of the gutter section 10, and a hook section 112 is formed at the upper end of the gutter section 10.

[0031] A climbing bar 132 is provided at the end of the ridge 102, and a ridge drain cover 111 is provided so as to cover the outer surface and the upper surface of the climbing bar 132. The ridge drain cover 111 is formed so as to extend along the ridge 102. The lower end of the ridge drain cover 111 is located below the sheathing board 1. A hook portion 113 is provided at the upper end of the ridge drain cover 111. The hook portion 112 of the gutter portion 10 and the hook portion 113 of the ridge drain cover 111 are hooked. As a result, the upper end of the ridge drain cover 111 is hooked on the gutter portion 10 and firmly attached, and the ridge drain cover 111 is less likely to fall off even in strong winds. The ridge drain cover 111 is also fixed to the climbing bar 132 with screws or the like.

[0032] FIG. 2B shows the structure of the corner ridge of the roof 101. In the corner ridge, a crosspiece 133 is provided at the end of the sheathing board 1, and the corner ridge side end of the roofing material 9 is placed on top of it. The crosspiece 133 is formed to extend along the corner ridge. A pair of copings 115 is provided on the upper surface of the corner ridge side end of the roofing material 9, and a ridge frame 114 is placed so as to straddle the pair of copings 115. The ridge frame 114 is fixed to the copings 115 with fixing devices 116 such as screws. In the corner ridge, the space between the crosspiece 113 and the vertical and horizontal beams 3 and 4 is formed as an air passage 134. The air passage 134 communicates with the eaves ventilation opening 51 at the eaves side end and communicates with the upper ventilation opening 6 at the upper end of the air passage 134 in the direction of the roof slope.

[0033] FIG. 3A shows the ventilation ridge of the roof 101. The ventilation ridge has an upper ventilation opening 6 that communicates with the ventilation passage 105. The upper ventilation opening 6 is formed in the ventilation ridge frame 117. The ventilation ridge frame 117 is arranged across both slopes of the roof 101. A maze structure is formed in the ventilation ridge frame 117, and the upper ventilation opening 6 is formed in front of the maze structure. The drain 118 blocks rainwater that seeps in from the upper ventilation opening 6 so that it does not reach the attic. Then, air is exhausted from the upper opening 6 through the maze structure from the ventilation passage 105.

[0034] FIG. 3B shows the structure of the valley of the roof 101. Crosspieces 135 are provided below the vertical and horizontal crosspieces 3 and 4 in the direction of the roof slope. The crosspieces 135 are formed so as to extend along the valley. A valley board 119 is provided in the valley. The valley board 119 is formed so as to extend along the valley. Both ends of the valley 119 are disposed between the crosspieces 135 and the valley side ends of the roofing material 9, and are fixed to the crosspieces 135. In the valley, the space between the crosspieces 135 and the vertical and horizontal crosspieces 3 and 4 is formed as an air passage 136. The air passage 136 communicates with the eaves ventilation opening 51 at the eaves side end, and communicates with the upper ventilation opening 6 at the upper end of the air passage 136 in the direction of the roof slope.

[0035] 4A shows the wall joint in the girder direction. 121 is an exterior material, and below the exterior material 121, a ventilation flashing 120 is placed on the top surface of the roof material 9. The ventilation flashing 120 has a labyrinth structure through which the air passage 105 and the upper ventilation opening 6 communicate. The upper ventilation opening 6 is formed on the surface of the ventilation flashing 120 facing the eaves. The ventilation flashing 120 is fixed to the roof material 9 and the cross beam 4 with fixing devices 123 such as screws. In addition, a drain 122 prevents rainwater that seeps in from the upper ventilation opening 6 from reaching the sheathing board 1.

[0036] 4B shows the wall joint portion in the direction of the roof slope (flow direction) of roof 101. In this case, a flashing 127 is provided below exterior material 121, and flashing 127 is fixed to coping 126 with fasteners 125 such as screws. A seal 124 is provided between flashing 127 and roof material 9. In addition, a disposable water drain 128 with a U-shaped cross section and an open top is provided below flashing 127. Disposal water drain 128 acts like a gutter and is used to drain water.

[0037] The construction process of the roof foundation structure 100 of this embodiment will be described below. First, as shown in FIG. 5A, the sheathing cap 130 is attached to the sheathing board 1. The sheathing board cap 130 is formed in a U-shape with one side long, and is fitted and attached to the eaves side end and the ridge side end of the sheathing board 1. Here, the sheathing board cap 130 is attached to the eaves side end of the sheathing board 1 so that the shorter side of the sheathing board cap 130 is on top, but the sheathing board cap 130 is attached to the ridge side end of the sheathing board 1 so that the shorter side of the sheathing board cap 130 is on top. This makes it easier to arrange the climbing tree 132 on the sheathing board cap 130 on the ridge side. Therefore, it is possible to make it difficult for the unevenness of the sheathing board 1 to affect the climbing tree 132, and for example, it is possible to reduce the rattling of the climbing tree 132 and make it difficult for it to shift out of position.

[0038] Next, as shown in FIG. 5B, a drainage member 7 is attached to the eaves side end of the sheathing board 1. The drainage member 7 can be attached using a fastener 131 such as double-sided tape, but is not limited to this. Next, as shown in FIG. 5C, a waterproof sheet 2 is placed over the entire upper surface of the sheathing board 1. A plurality of waterproof sheets 2 are placed, and adjacent waterproof sheets 2 are placed one above the other. Next, as shown in FIG. 6A, a climbing bar 132 is placed on the waterproof sheet 2 at the eaves side end. The climbing bars 132 are placed in two tiers, one above the other. The climbing bars 132 are also placed so as to extend along the edge of the eaves. Next, as shown in FIG. 6B, a plurality of vertical bars 3 are placed on the waterproof sheet 2. Each vertical bar 3 is placed so as to extend along the direction of the roof slope. The multiple vertical bars 3 are also placed side by side at a predetermined interval (the interval between the rafters 104) in a direction perpendicular to the roof slope direction. As shown in Figures 7A and 7B, crosspieces 133 are arranged in the corner ridge portion, and as shown in Figures 8A and 8B, crosspieces 135 are arranged in the valley portion. The interval between the crosspieces 133 and 135 and the adjacent vertical bars 3 can be about 30 mm, but is not limited to this. The interval between the crosspiece 133 and the vertical bar 3 forms an air passage 134 in the corner ridge portion, and the interval between the crosspiece 135 and the vertical bar 3 forms an air passage 136 in the valley portion. After that, multiple horizontal bars 4 are arranged on the vertical bars 3 and fixed, as shown in Figure 6C.

[0039] Thereafter, the construction of the eaves ventilation member 5, the front drip-water member 8, the roof material 9, the ridge panel 117, etc. are carried out in sequence, thereby forming the roof foundation structure 100 and the roof 101.

[0040] (summary) As described above, the roof underlayment structure 100 of the first embodiment comprises a sheathing board 1, a waterproof sheet 2 arranged on the sheathing board 1, vertical bars 3 arranged on the waterproof sheet 2, horizontal bars 4 arranged on the vertical bars 3, an eaves ventilation member 5 having an eaves ventilation opening 51, an upper ventilation opening 6 communicating with the eaves ventilation opening 51, a sewer drainage member 7 located below the eaves ventilation opening 51, and a front drainage member 8 located in front of the eaves ventilation opening.

[0041] According to this embodiment, there is an advantage that the eaves ventilation opening 51 is made less visible by the drainage member 7 and the front drainage member 8, and the appearance of the roof 101 is less likely to be marred. There is also an advantage that the infiltration of rainwater into the eaves ventilation opening 51 from between the drainage member 7 and the front drainage member 8 is reduced, improving waterproofing.

[0042] In the second embodiment, the distance between the lower drain member 7 and the front drain member 8 in the first embodiment is gradually narrowed in the direction from the base to the tip.

[0043] According to this embodiment, there is an advantage that the infiltration of rainwater into the eaves ventilation opening 51 from between the lower drainage member 7 and the front drainage member 8 is further reduced, thereby improving waterproofing.

[0044] In the third aspect, in the first or second aspect, a gutter portion 10 extending in the longitudinal direction of the vertical beam 3 is further provided in the ridge.

[0045] According to this embodiment, there is an advantage that water can be drained through the gutter portion 10, and waterproofing can be further improved. [Explanation of symbols]

[0046] 1 field board 2. Tarpaulin 3 Vertical bars 4. Horizontal rail 5. Eaves ventilation components 51 Eaves ventilation opening 6 Upper ventilation hole 7 Sewer drainage material 8 Front drainage member 10 Hibe

Claims

1. Subfloor boards and A waterproof sheet placed on the roofing board; A vertical bar disposed on the waterproof sheet; A horizontal bar arranged on the vertical bar; An eaves ventilation member having an eaves ventilation opening; An upper ventilation opening communicating with the eaves ventilation opening; A drainage member located below the eaves ventilation opening; A front drainage member located in front of the eaves ventilation opening, The front drainage member extends vertically downward from the base to the tip, and the bottom drainage member extends diagonally downward from the base so that the tip of the bottom drainage member faces the tip of the front drainage member. Roof underlayment structure.

2. The distance between the lower drain member and the front drain member is gradually narrowed in a direction from the base to the tip. The roof foundation structure according to claim 1.

3. The gutter portion is further provided on the eaves extending in the longitudinal direction of the vertical beam. The roof foundation structure according to claim 1 or 2.

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