Outer thermal insulation structure and manufacturing method

Abstract

To provide an outer thermal insulation structure which can reduce production of waste and realize high adiathermancy, and a manufacturing method.SOLUTION: An outer thermal insulation structure of a building comprises an existing outer wall 10, an existing exterior material 30 that is attached to the aforesaid existing outer wall 10 with a space on the outside of the aforesaid existing outer wall 10, a thermal insulation layer 25 that is filled between the aforesaid existing exterior material 30 and the aforesaid existing outer wall 10, and a thermal insulation material 45 that is attached to the aforesaid existing exterior material 30.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an external insulation structure and a method of manufacture. [Background technology]

[0002] Patent Document 1 discloses a remodeling technique for improving the thermal insulation performance of existing wooden houses. Specifically, a part of the existing exterior material installed on the exterior wall of the existing wooden house is removed, then the removed part is blocked with a structural surface material, next, a thermal insulation material is attached to the outer surface of the structural surface material, next, a furring strip is installed on the outer surface of the thermal insulation material, and next, a new exterior material is installed on the furring strip. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-177058 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, the removed existing exterior material must be disposed of as waste. The generation of waste is a social problem from the viewpoint of the environment, etc. Furthermore, in order for the newly installed insulation to adequately insulate the house, the insulation needs to have high insulating performance, which means the insulation becomes thick.

[0005] The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide an external insulation structure and a manufacturing method thereof that can reduce waste generation and achieve high insulation properties. [Means for solving the problem]

[0006] The following reference numerals in parentheses refer to FIGS. 1 to 7.

[0007] According to the invention of claim 1, there is provided an external insulation structure for a building, comprising an exterior wall (10), an existing exterior material (30) attached to the exterior wall (10) at a distance from the exterior wall (10) toward the outdoors, a thermal insulation layer (25) filled between the existing exterior material (30) and the exterior wall (10), and a thermal insulation material (45) attached to the existing exterior material (30).

[0008] According to the invention as set forth in claim 1 as described above, the existing exterior material (30) remains without being removed, thereby reducing the generation of waste. The insulating layer (25) is filled between the existing exterior material (30) and the exterior wall (10), and the insulating material (45) is then attached to the existing exterior material (30), so the insulating performance of the external insulation structure is high. Even if the insulating performance of the insulating material (45) is low because the insulating material (45) is thin, for example, the insulating layer (25) compensates for the lack of insulating performance. The insulating layer (25) contributes to the thinness of the insulating material (45) and the high insulating properties of the external insulation structure, and thus contributes to the thinness of the external insulation structure.

[0009] According to the invention of claim 2, there is provided an external insulation structure as described in claim 1, further comprising a blocking material (40), wherein the existing exterior material (30) has a hole (32) penetrating the existing exterior material (30), the blocking material is fitted into the hole (32) to block the hole (32), the blocking material (40) is fixed to the exterior wall (10), and the insulating material (45) is fixed to the blocking material (40).

[0010] According to the invention of claim 2 as described above, the blocking material (40) contributes to protecting the heat insulating layer (25) filled between the existing exterior material (30) and the outer wall (10).

[0011] According to the invention of claim 3, there is provided an external insulation structure as described in claim 2, characterized in that the insulation material (45) is fixed to the blocking material (40) by driving a screw (42) into the insulation material (45) and the blocking material (40) from outside the insulation material (45).

[0012] According to the invention of claim 3 as described above, the screws (42) contribute to firmly attaching the heat insulating material (45) to the existing exterior material (30).

[0013] According to the invention of claim 4, there is provided an external insulation structure as described in claim 3, characterized in that the screws (42) reach the exterior wall (10) and are also driven into the exterior wall (10).

[0014] According to the invention as defined in claim 4, the screws (42) that reach the exterior wall (10) contribute to firmly attaching the heat insulating material (45) to the existing exterior material (30).

[0015] According to the invention of claim 5, there is provided an external insulation structure as described in any one of claims 1 to 3, characterized in that the insulation material (45) is adhered to the existing exterior material (30).

[0016] According to the fifth aspect of the invention, the heat insulating material (45) is adhered to the existing exterior material (30), and therefore the heat insulating material (45) is firmly attached to the existing exterior material (30).

[0017] According to the invention of claim 6, there is provided an external insulation structure as described in any one of claims 1 to 3, further comprising an exterior material (70) attached to the insulation material (45) outdoors.

[0018] According to the sixth aspect of the invention, the exterior material (70) protects the heat insulating material (45) from sunlight, outside air, wind and rain, etc. The exterior material (70) contributes to improving the design of the building.

[0019] According to the invention of claim 7, there is provided an external insulation structure as described in claim 6, further comprising an air-permeable layer (60) formed between the insulation material (45) and the exterior material (70) by separating the exterior material (70) from the insulation material (45).

[0020] According to the invention of claim 7 as described above, when the humidity inside the exterior wall (10), the insulation layer (25), the existing exterior material (30), and the insulation material (45) increases, the moisture is discharged from inside the exterior wall (10), the insulation layer (25), the existing exterior material (30), and the insulation material (45) to the ventilation layer (60). Therefore, condensation inside the exterior wall (10), the insulation layer (25), the existing exterior material (30), and the insulation material (45) is prevented, and deterioration of the exterior wall (10), the insulation layer (25), the existing exterior material (30), and the insulation material (45) is prevented.

[0021] According to the invention of claim 8, there is provided a manufacturing method for an external insulation structure of a building, comprising: an injection step of injecting small lumps of insulating material or foamed resin (26) into a cavity (90) between the exterior wall (10) and an existing exterior material (30) attached to the exterior wall (10) away from the exterior wall (10) toward the outdoors, thereby forming an insulating layer (25) made of the small lumps or foamed resin (26) in the cavity (90); and an exterior cladding step of attaching an insulating material (45) to the existing exterior material (30).

[0022] According to the invention as defined in claim 8, the existing exterior material (30) remains without being removed, thereby reducing the generation of waste. The insulating layer (25) is filled between the existing exterior material (30) and the exterior wall (10), and the insulating material (45) is then attached to the existing exterior material (30), so the insulating performance of the external insulation structure is high. Even if the insulating performance of the insulating material (45) is low because the insulating material (45) is thin, for example, the insulating layer (25) compensates for the lack of insulating performance. The insulating layer (25) contributes to the thinness of the insulating material (45) and the high insulating properties of the external insulation structure, and thus contributes to the thinness of the external insulation structure.

[0023] According to the invention of claim 9, there is provided a manufacturing method as described in claim 8, further comprising a hole drilling step of drilling a hole (32) in the existing exterior material (30) from the outside to a cavity (90), and characterized in that in the injection step, the small pieces or the foamed resin (26) are injected into the cavity (90) through the hole (32).

[0024] According to the ninth aspect of the invention, the foaming resin (26) is injected into every corner of the cavity (90). This prevents imperfect construction of the insulation layer (25) and prevents large voids from occurring in the insulation layer (25).

[0025] According to the invention of claim 10, there is provided a manufacturing method as described in claim 9, further comprising a blocking step of fitting a blocking material (40) into the hole (32) after the injection step to block the hole (32) with the blocking material (40), and characterized in that in the exterior covering step, the insulation material (45) is fixed to the blocking material (40).

[0026] According to the invention of claim 11, there is provided a manufacturing method as described in claim 10, characterized in that the blocking material (40) is fixed to the outer wall (10) in the outer covering process or the blocking process.

[0027] According to the invention as set forth in claims 10 and 11, the existing exterior material (30) is firmly attached to the heat insulating material (45).

[0028] According to the invention of claim 12, there is provided a manufacturing method as described in claim 10, characterized in that in the exterior covering process, the insulation material (45) is fixed to the blocking material (40) by driving screws (42) into the insulation material (45) and the blocking material (40) from outside the insulation material (45).

[0029] According to the invention as defined in claim 12, the screws (42) contribute to firmly attaching the heat insulating material (45) to the existing exterior material (30).

[0030] According to the invention of claim 13, there is provided the manufacturing method according to claim 12, characterized in that the screw (42) is driven into the outer wall (10).

[0031] According to the invention as defined in claim 13 as described above, the screws (42) that reach the exterior wall (10) contribute to firmly attaching the heat insulating material (45) to the existing exterior material (30).

[0032] According to the invention of claim 14, there is provided a manufacturing method as described in any one of claims 10 to 13, characterized in that in the exterior covering process, the insulation material (45) is adhered to the existing exterior material (30).

[0033] According to the fourteenth aspect of the invention, the existing exterior material (30) is firmly attached to the heat insulating material (45).

[0034] According to the invention of claim 15, there is provided a manufacturing method for the external insulation structure described in any one of claims 8 to 13, further comprising an exterior attachment step of attaching an exterior material (70) to the insulation material (45) outdoors.

[0035] According to the invention as set forth in claim 15, the exterior material (70) protects the heat insulating material (45) from sunlight, outside air, wind and rain, etc. The exterior material (70) contributes to improving the design of the building.

[0036] According to the invention of claim 16, there is provided the manufacturing method as recited in claim 15, characterized in that in the exterior packaging step, the exterior material (70) is separated from the insulation material (45) to form a ventilation layer (60) between the insulation material (45) and the exterior material (70).

[0037] According to the invention of claim 16 as described above, when the humidity inside the exterior wall (10), the insulation layer (25), the existing exterior material (30), and the insulation material (45) increases, the moisture is discharged from inside the exterior wall (10), the insulation layer (25), the existing exterior material (30), and the insulation material (45) to the ventilation layer (60). Therefore, condensation inside the exterior wall (10), the insulation layer (25), the existing exterior material (30), and the insulation material (45) is prevented, and deterioration of the exterior wall (10), the insulation layer (25), the existing exterior material (30), and the insulation material (45) is prevented. Effect of the Invention

[0038] According to the present invention, the generation of waste is suppressed. The insulation property of the external insulation structure is high. The insulation material and the external insulation structure can be made thin. [Brief description of the drawings]

[0039] [Figure 1] FIG. 2 is a vertical cross-sectional view of the exterior insulation structure of a building. [Diagram 2] A horizontal cross-sectional view of the side of the exterior insulation structure of a building. [Diagram 3] This is a vertical cross-sectional view of the exterior walls and existing exterior materials of a building before renovation. [Figure 4] FIG. [Diagram 5] 1A to 1C are explanatory diagrams of a hole making step, an injection step, and a closing step. [Figure 6] FIG. [Figure 7] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] Hereinafter, the embodiments will be described with reference to the drawings. The features and technical effects of the embodiments will be understood from the following detailed description and drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. The drawings are provided for illustrative purposes only, and therefore the scope of the present invention is not limited to the illustrations in the drawings.

[0041] <1. External insulation structure> FIG. 1 is a vertical cross-sectional view showing the external insulation structure of a building. The building is a wooden house with a wall structure. A wall structure refers to a structure in which a building is supported by planar structural members such as walls and floors. More specifically, the building is a wooden house constructed by a wood panel construction method. The building may also be a wooden house with a wall structure constructed by a wooden frame construction method. The building may also be a wooden house with a rigid frame structure constructed by a wooden frame construction method. This building is a two-story house. However, the building may also be a one-story or three-story house. This building has been renovated and the thermal insulation performance of the building has been improved through the renovation, i.e. the external thermal insulation of this building has been added through the renovation.

[0042] The external insulation structure comprises an existing exterior wall 10, an existing waterproof / breathable sheet 20, a heat insulating layer 25, an existing exterior material 30, a blocking material 40, a heat insulating material 45, a waterproof / breathable sheet 50, a vertical furring strip 55, a ventilation layer 60, an exterior material 70, and a water cutout 75. The existing exterior wall 10, the existing waterproof / breathable sheet 20, and the existing exterior material 30 were installed before the renovation, and the heat insulating layer 25, the blocking material 40, the heat insulating material 45, the waterproof / breathable sheet 50, the vertical furring strip 55, the ventilation layer 60, the exterior material 70, and the water cutout 75 were newly installed during the renovation.

[0043] The existing exterior wall 10 is installed on a foundation 12. An inclusion 15 as a horizontal member is laid on the upper end of the foundation 12, and may be sandwiched between the existing exterior wall 10 and the foundation 12. The inclusion 15 is, for example, a ventilation plinth. The ventilation plinth has many vents that lead from the underfloor space on the first floor to the outdoors.

[0044] The existing exterior wall 10 has a plurality of wall panels 11 that are erected and joined along a vertical plane. The wall panels 11 are wooden panels with a hollow structure. That is, the wall panels 11 have a rectangular frame 11a having a pair of vertical frames and a pair of horizontal frames, two face materials 11b, 11c that are attached to the front and back surfaces of the rectangular frame 11a, respectively, to cover the inside of the rectangular frame, and one or more auxiliary crosspieces that are assembled vertically, horizontally, or vertically and horizontally inside the rectangular frame. A heat insulating material may be filled between the two face materials. The wall panels 11 of the first floor are arranged horizontally on a horizontal base 13 on a foundation 12, and horizontally adjacent wall panels 11 are joined to each other. A horizontal girth 14 is joined to the upper end of the wall panels 11 of the first floor. The wall panels 11 of the second floor are arranged horizontally on the girth 14, and horizontally adjacent wall panels 11 are joined to each other. In addition, when the building is a wooden house with a rigid frame structure constructed using the wooden frame construction method, the existing exterior wall 10 has a number of studs, a paneling attached to the studs from the outside, and a paneling attached to the studs from the inside.

[0045] The existing waterproof / moisture-permeable sheet 20 is attached to the outer surface of the existing exterior wall 10. The outer surface of the existing exterior wall 10 refers to the surface facing outdoors, and the inner surface of the existing exterior wall 10 refers to the surface facing indoors. In FIG. 1, the existing waterproof / moisture-permeable sheet 20 is illustrated separated from the outer surface of the existing exterior wall 10, but in reality, the existing waterproof / moisture-permeable sheet 20 is in contact with the outer surface of the existing exterior wall 10.

[0046] The existing exterior material 30 is attached to the existing exterior wall 10, away from the existing waterproof / breathable sheet 20 and the existing exterior wall 10 toward the outdoors. Specifically, a number of furring strips are fixed to the exterior surface of the existing exterior wall 10 from the outdoor side of the existing waterproof / breathable sheet 20, and these furring strips are sandwiched between the existing exterior material 30 and the existing exterior wall 10, and the existing exterior material 30 is fixed to these furring strips. The furring strips function as spacers that form a gap between the existing exterior material 30 and the existing exterior wall 10. Before the renovation, there was a cavity between the existing exterior material 30 and the existing exterior wall 10, and the cavity functions as a ventilation layer that leads to the outdoors at the lower end of the existing exterior material 30 and to the cavity 82 above the eaves material 80 and the ceiling space on the second floor at the upper end of the existing exterior material 30.

[0047] The insulating layer 25 is filled between the existing exterior material 30 and the existing exterior wall 10. The insulating layer 25 may be made of foamed resin such as phenol foam, polyurethane foam, polystyrene foam, or polyolefin foam. The insulating layer 25 may be a pile of small lumps of insulating material (e.g., phenol foam, polystyrene foam, glass wool, rock wool, urethane foam, polyolefin foam, or cellulose fiber). The small lumps are, for example, cotton-like.

[0048] The existing exterior material 30 has a plurality of holes 32 penetrating from its outer surface to its inner surface. The outer surface of the existing exterior material 30 refers to the surface facing the outdoors, and the inner surface of the existing exterior material 30 refers to the surface facing the interior. The holes 32 are used to fill the gap between the existing exterior material 30 and the existing exterior wall 10 with pre-hardened foamed resin.

[0049] The blocking material 40 is fitted into the hole 32 to block the hole 32. The blocking material 40 is, for example, wood or metal. The blocking material 40 is fixed to the existing exterior wall 10 with a screw, which may be a screw 42 described below. The blocking material 40 may be applied to the outer surface of the existing exterior wall 10 via the existing waterproof / breathable sheet 20, or the insulating layer 25 may be sandwiched between the blocking material 40 and the outer surface of the existing exterior wall 10. A part of the insulating layer 25 may be buried in the hole 32 as the blocking material 40.

[0050] The heat insulating material 45 is attached to the outer surface of the existing exterior material 30. Any method of attaching the heat insulating material 45 to the existing exterior material 30 may be used, and the heat insulating material 45 is supported, attached, fixed, or bonded to the existing exterior material 30. The heat insulating material 45 may be directly fixed to the existing exterior material 30 by fasteners such as screws or metal fittings, or may be indirectly fixed to the existing exterior material 30 by being directly fixed to the existing exterior wall 10 by fasteners such as screws or metal fittings. For example, screws may be driven into the heat insulating material 45 and the existing exterior material 30 from the outside. For example, screws 42 are driven into the heat insulating material 45 and the blocking material 40 from the outside. The screws 42 may reach the existing exterior wall 10, or may not reach the existing exterior wall 10. The screws 42 contribute to the strong fixation of the heat insulating material 45. For example, an adhesive such as a dedicated putty bond may be applied to the outer surface of the existing exterior material 30, and the heat insulating material 45 may be bonded to the existing exterior material 30 by the adhesive. If the outer surface of the existing exterior material 30 is uneven, the adhesive fills in the recesses in the outer surface of the existing exterior material 30, thereby contributing to preventing gaps from occurring between the insulation material 45 and the existing exterior material 30.

[0051] The heat insulating material 45 is made of, for example, phenol foam, polystyrene foam, glass wool, rock wool, urethane foam, polyolefin foam, or cellulose fiber.

[0052] The insulation material 45 may be a plurality of insulation modules having a standardized size in the form of a rectangular or square plate that are erected along the outer surface of the existing exterior material 30. The side length of the insulation module is an integer multiple of a reference length such as 910 mm or 1000 m. The insulation module may have a rectangular frame, a facing attached to both sides or one side of the rectangular frame, and an insulation material (e.g., phenol foam, polystyrene foam, glass wool, rock wool, urethane foam, polyolefin foam, or cellulose fiber) filled inside the rectangular frame. When a plurality of insulation modules are used for the insulation material 45 and an end of the insulation material 45 is located at a corner of the building, an insulation accessory may be attached to the end.

[0053] The waterproof / moisture-permeable sheet 50 is attached to the outer surface of the insulating material 45. The outer surface of the insulating material 45 refers to the surface facing outdoors, and the inner surface of the insulating material 45 refers to the surface facing indoors. In FIG. 1, the waterproof / moisture-permeable sheet 50 is illustrated separated from the outer surface of the insulating material 45, but in reality the waterproof / moisture-permeable sheet 50 is in contact with the outer surface of the insulating material 45.

[0054] The exterior material 70 is attached to the insulation material 45 away from the waterproof / breathable sheet 50 and the insulation material 45 toward the outdoors. Specifically, a plurality of vertical furring strips 55 are attached to the insulation material 45 from the outdoor side of the waterproof / breathable sheet 50, and these vertical furring strips 55 are sandwiched between the exterior material 70 and the insulation material 45, and the exterior material 70 is fixed to these vertical furring strips 55. These vertical furring strips 55 extend vertically and are arranged horizontally at intervals. These vertical furring strips 55 function as spacers that form a gap between the exterior material 70 and the insulation material 45. A cavity is formed between the exterior material 70 and the insulation material 45, and this cavity is the ventilation layer 60. The lower end of the ventilation layer 60 is open and communicates with the outdoors, and the upper end of the ventilation layer 60 communicates with a cavity 82 above the eaves ceiling material 80 and the ceiling space on the second floor through a ventilation hole 81 in the eaves ceiling material 80. The upper end of the exterior material 70 may be separated downward from the eaves material 80, and the upper end of the ventilation layer 60 may be connected to the outdoors. In this case, the ventilation hole 81 is not formed.

[0055] The drain 75 is provided below the heat insulating material 45, the ventilation layer 60, and the exterior material 70. The drain 75 is fixed, for example, to the lower end of the existing exterior material 30. The drain 75 slopes downward toward the outside and is spaced downward from the exterior material 70. The lower end of the ventilation layer 60 is not blocked by the drain 75 and is open.

[0056] The external heat insulation structure as shown in FIG. 1 may be provided around the entire periphery of the house, or may be provided around a part of the periphery of the house.

[0057] As shown in Fig. 2, when the exterior material 70 and the insulation material 45 are adjacent to the sash 85, the edges of the exterior material 70 and the insulation material 45 closest to the sash 85 are covered by a trim material 77. The trim material 77 is disposed on the outdoor side of an existing trim material 87 buried between the sash frame 86 of the sash 85 and the existing exterior material 30, and extends vertically along the existing trim material 87. The trim material 77 is fixed to the existing exterior material 30, for example. Because the trim material 77 and the existing trim material 87 are provided in a box shape so as to have a hollow space, the trim material 77 and the existing trim material 87 are also referred to as a casing.

[0058] <2. Manufacturing method of external insulation structure> A method for manufacturing an external insulation structure, that is, a method for renovating the exterior walls of a building, will be described.

[0059] As shown in Fig. 3, before renovation, an existing waterproof / breathable sheet 20 is attached to the outer surface of an existing exterior wall 10, an existing exterior material 30 is attached to the existing exterior wall 10 away from the existing waterproof / breathable sheet 20 and the existing exterior wall 10 toward the outdoors, and an existing ventilation layer 90 as a cavity is formed between the existing exterior material 30 and the existing exterior wall 10. The lower end of the existing ventilation layer 90 is open and communicates with the outdoors. The upper end of the existing ventilation layer 90 communicates with a cavity 82 above the eaves material 80 and the space above the second floor ceiling.

[0060] (1) Cleaning process First, the existing exterior material 30 is cleaned. In addition, the existing drip edge 75 located below the existing exterior material 30 is removed.

[0061] (2) Rainproofing process Next, as shown in FIG. 4, a plurality of supports 100 are erected on the ground at a location away from the existing exterior material 30, and these supports 100 are arranged horizontally along the existing exterior material 30. Scaffolding supports may be used for the supports 100. A temporary roof 101 is placed between the upper ends of these supports 100 and the roof 110 of the building, and the temporary roof 101 is fixed to the supports 100. Scaffolding steps may be used for the temporary roof 101. A recess 102 is formed on the underside of the temporary roof 101 into which the upper ends of the supports 100 are hooked. A cushioning material 103 is provided on the edge of the underside of the temporary roof 101 to protect the roof 110 of the building. The cushioning material 103 is made of rubber, for example. By installing such a temporary roof 101, the renovation work can be carried out even if it rains during the renovation period, and the materials and the existing exterior material 30, etc. do not get wet from the rain.

[0062] (3) Hole punching process 5, a ventilation hole 81 is opened in the eaves material 80 at a position spaced apart from the existing exterior material 30 by the thickness of the heat insulating material 45. It is not necessary to form the ventilation hole 81. Next, a hole 32 is opened in the existing exterior material 30 from the outdoors to the existing ventilation layer 90. The hole 32 is opened using, for example, a hole saw.

[0063] (4) Injection process Next, as shown in FIG. 5, the uncured foamed resin 26 is injected into the existing ventilation layer 90 through the hole 32, thereby filling the existing ventilation layer 90 with the foamed resin 26. For example, a spray nozzle may be inserted into the hole 32, and the foamed resin 26 may be sprayed onto the existing ventilation layer 90 by the spray nozzle. The foamed resin 26 may be injected into the existing ventilation layer 90 from an opening at the lower end of the existing ventilation layer 90. The foamed resin 26 may be injected into the existing ventilation layer 90 from a cavity 82 above the eaves soffit material 80 through an opening at the upper end of the existing ventilation layer 90. Note that if the foamed resin 26 is injected into the existing ventilation layer 90 from the opening at the lower end or the upper end, or both of these openings, and thus the entire existing ventilation layer 90 is filled with the foamed resin 26, the holes 32 do not need to be opened. The foamed resin 26 injected into the existing ventilation layer 90 hardens to become the heat insulating layer 25.

[0064] In addition, small lumps of a heat insulating material (e.g., phenol foam, polystyrene foam, glass wool, rock wool, urethane foam, polyolefin foam, or cellulose fiber) may be used instead of the uncured foamed resin 26. The small lumps of the heat insulating material may be cotton-like. The small lumps of the heat insulating material may be injected into the existing ventilation layer 90 from the hole 32 by air blasting or the like. The small lumps of the heat insulating material may be injected into the existing ventilation layer 90 from the opening at the lower end of the existing ventilation layer 90 by air blasting or the like. The small lumps of the heat insulating material may be injected into the existing ventilation layer 90 from the cavity 82 above the eaves soffit material 80 through the opening at the upper end of the existing ventilation layer 90 by air blasting or the like. The small lumps of the heat insulating material are filled into the existing ventilation layer 90 to form the heat insulating layer 25, which is an aggregate of the small lumps of the heat insulating material. Before or after the injection of the small lumps of the heat insulating material, the opening at the lower end of the existing ventilation layer 90 may be blocked with a sealant made of resin or wood.

[0065] (5) Closure process Next, as shown in FIG. 5, the blocking material 40 is fitted into the hole 32 to close the hole 32 with the blocking material 40. At this time, the blocking material 40 may be fixed to the existing exterior wall 10 by driving a screw into the blocking material 40 and the existing exterior wall 10. The blocking material 40 may be fitted into the hole 32 before the foamed resin 26 hardens, and the blocking material 40 may be bonded and fixed to the existing exterior wall 10 by the foamed resin 26 hardening. Fixing the blocking material 40 with a screw and fixing the blocking material 40 with the foamed resin 26 may be combined, or either one of them may be used. Note that the foamed resin 26 may also be filled into the hole 32 when the insulating layer 25 is formed, and the foamed resin 26 in the hole 32 may harden to become the blocking material 40.

[0066] (6) Exterior cladding process Next, as shown in FIG. 6, the heat insulating material 45 is attached to the outer surface of the existing exterior material 30. For example, an adhesive may be applied to the existing exterior material 30 or the heat insulating material 45, or both, and the heat insulating material 45 may be bonded to the existing exterior material 30 by the adhesive. The heat insulating material 45 may be directly fixed to the existing exterior material 30 by fasteners such as screws or metal fittings, or the heat insulating material 45 may be indirectly fixed to the existing exterior material 30 by directly fixing the heat insulating material 45 to the existing exterior wall 10 by fasteners such as screws or metal fittings. Screws may be driven into the heat insulating material 45 and the existing exterior material 30 from the outside. For example, screws 42 may be driven into the heat insulating material 45, the blocking material 40, and the existing exterior wall 10 from the outside.

[0067] Next, the waterproof / breathable sheet 50 is attached to the heat insulating material 45.

[0068] (7) Exterior process Next, as shown in FIG. 7, a plurality of vertical furring strips 55 are arranged horizontally at intervals and attached to the heat insulating material 45 from outside the waterproof / vapor permeable sheet 50 . Next, the exterior material 70 is fixed to the vertical furring strips 55 so as to separate the exterior material 70 from the waterproof / breathable sheet 50 and the insulating material 45, and a ventilation layer 60 is formed between the exterior material 70 and the insulating material 45. If the ventilation hole 81 is formed, the opening at the upper end of the ventilation layer 60 is connected to the ventilation hole 81 when the exterior material 70 is installed. If the ventilation hole 81 is not formed, the upper end of the exterior material 70 is separated from the eaves material 80 when the exterior material 70 is installed.

[0069] (8) Finishing process Next, the drip edge 75 is moved downward away from the insulation material 45 and the ventilation layer 60, and the drip edge 75 is fixed, for example, to the lower end of the existing exterior material 30. Next, the edges of the exterior material 70 and the insulation material 45 near the sash 85 are covered with a parting material 77, and the existing parting material 87 buried between the sash frame 86 of the sash 85 and the existing exterior material 30 is covered with the parting material 77. The parting material 77 may be fixed to any of the insulation material 45, the exterior material 70, or the existing parting material 87. Next, the temporary roof 101 and the supports 100 are removed.

[0070] <3. Summary> Since the existing exterior material 30 and the existing waterproof / moisture permeable sheet 20 are left without being removed, the generation of waste is reduced. In addition, since there is no need to remove the existing exterior material 30 and the existing waterproof / moisture permeable sheet 20, the time, effort, and cost of construction are reduced.

[0071] The insulating layer 25 is filled between the existing exterior material 30 and the existing exterior wall 10, and then the insulating material 45 is attached to the existing exterior material 30, so that the insulating performance of the external insulation structure is high. Even if the insulating material 45 is thin and has low insulating performance, the insulating layer 25 compensates for the lack of insulating performance. Therefore, the insulating layer 25 contributes to the thinness of the insulating material 45 and the high insulating properties of the external insulation structure, and ultimately contributes to the thinness of the external insulation structure.

[0072] The blocking material 40 is fitted into the hole 32 in the existing exterior material 30 to block the hole 32 , so that the insulating layer 25 is protected by the blocking material 40 and the existing exterior material 30 .

[0073] Since the heat insulating material 45 is fixed to the blocking material 40 by the screws 42, the heat insulating material 45 is firmly attached to the existing exterior material 30. Even if it is particularly difficult to drive screws into the existing exterior material 30, the heat insulating material 45 is firmly attached to the existing exterior material 30.

[0074] Since the blocking material 40 is fixed to the existing exterior wall 10 by the screws 42, the blocking material 40 is unlikely to come off the hole 32, and the heat insulating material 45 is firmly attached to the existing exterior material 30.

[0075] Because the heat insulating material 45 is adhered to the existing exterior material 30 by the adhesive, the heat insulating material 45 is firmly attached to the existing exterior material 30. In particular, even if the outer surface of the existing exterior material 30 is uneven, the adhesive fills in the recesses in the outer surface of the existing exterior material 30, so gaps are unlikely to occur between the heat insulating material 45 and the existing exterior material 30.

[0076] Since the existing waterproof / moisture-permeable sheet 20 and the waterproof / moisture-permeable sheet 50 have moisture permeability, when the humidity inside the existing exterior wall 10, the insulation layer 25, the existing exterior material 30, and the insulation material 45 rises, moisture is discharged from inside the existing exterior wall 10, the insulation layer 25, the existing exterior material 30, and the insulation material 45 to the ventilation layer 60. Since the ventilation layer 60 is connected to the cavity 82 above the eaves material 80 and the outdoors, moisture is discharged from the ventilation layer 60. Therefore, condensation inside the insulation layer 25, the existing exterior material 30, the insulation material 45, and the existing exterior wall 10 is prevented, and deterioration of the insulation layer 25, the existing exterior material 30, the insulation material 45, and the existing exterior wall 10 is prevented.

[0077] Since the foamed resin 26 is injected into the existing ventilation layer 90 from the holes 32 in the existing exterior material 30, the foamed resin 26 reaches every corner of the existing ventilation layer 90. Therefore, large voids are not generated in the heat insulating layer 25, and poor construction of the heat insulating layer 25 is prevented.

[0078] The external insulation structure and its manufacturing method described above contribute to reducing energy consumption in homes and suppressing waste generation. In other words, the external insulation structure contributes to promoting carbon neutrality, realizing a decarbonized society, and achieving the Sustainable Development Goals (SDGs). [Explanation of symbols]

[0079] 10 Existing exterior wall 25 Insulation Layer 26 Foam Resin 30 Existing exterior materials 32 holes 40 Occlusion material 45 Insulation 60 Breathable layer 70 Exterior materials 90 Existing ventilation layer (cavity)

Claims

1. An external insulation structure for a building, The exterior wall and An existing exterior material attached to the exterior wall at a distance from the exterior wall toward the outdoors; A heat insulating layer filled between the existing exterior material and the exterior wall; A heat insulating material attached to the existing exterior material; An external insulation structure comprising:

2. The external insulation structure according to claim 1, Further comprising an occluder, The existing exterior material has a hole penetrating the existing exterior material, The plug is fitted into the hole to plug the hole, The blocking material is fixed to the outer wall, and the insulating material is fixed to the blocking material. An external insulation structure.

3. The external insulation structure according to claim 2, The insulating material is fixed to the blocking material by driving a screw into the insulating material and the blocking material from the outside of the insulating material. An external insulation structure.

4. The external insulation structure according to claim 3, The screws reach the exterior wall and are driven into the exterior wall. An external insulation structure.

5. The external insulation structure according to any one of claims 1 to 3, The heat insulating material is bonded to the existing exterior material. An external insulation structure.

6. The external insulation structure according to any one of claims 1 to 3, The device further includes an exterior material attached to the heat insulating material outdoors. An external insulation structure.

7. The external insulation structure according to claim 6, The insulation material is spaced from the exterior material, forming an air permeable layer between the insulation material and the exterior material. An external insulation structure.

8. A method for manufacturing an exterior insulation structure of a building, comprising: an injection process for injecting small pieces of insulating material or foamed resin into a cavity between the exterior wall and an existing exterior material attached to the exterior wall at a distance from the exterior wall toward the outdoors, thereby forming an insulating layer made of the small pieces or foamed resin in the cavity; An exterior cladding process of attaching a heat insulating material to the existing exterior material; A manufacturing method comprising the steps of:

9. The method according to claim 8, further comprising the steps of: The method further includes a step of drilling a hole in the existing exterior material from the outside to the cavity; In the injection step, the small piece or the foamed resin is injected into the cavity through the hole. A manufacturing method comprising the steps of:

10. The method according to claim 9, further comprising the steps of: The method further includes a plugging step of fitting a plugging material into the hole to plug the hole with the plugging material after the injection step, In the exterior covering process, the heat insulating material is fixed to the blocking material. A manufacturing method comprising the steps of:

11. The method of claim 10, further comprising the steps of: The blocking material is fixed to the outer wall in the covering step or the blocking step. A manufacturing method comprising the steps of:

12. The method of claim 10, further comprising the steps of: In the exterior lining process, screws are driven into the insulating material and the blocking material from outside the insulating material, thereby fixing the insulating material to the blocking material. A manufacturing method comprising the steps of:

13. The method of claim 12, further comprising the steps of: Drive the screw into the outer wall. A manufacturing method comprising the steps of:

14. The method according to any one of claims 10 to 13, comprising the steps of: In the exterior cladding process, the heat insulating material is adhered to the existing exterior material. A manufacturing method comprising the steps of:

15. The method according to any one of claims 8 to 13, comprising the steps of: An exterior covering step of attaching an exterior covering to the heat insulating material outdoors. The method further comprises:

16. The method of claim 15, further comprising the steps of: In the exterior packaging step, the exterior packaging material is separated from the heat insulating material to form a ventilation layer between the heat insulating material and the exterior packaging material. A manufacturing method comprising the steps of:

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