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 outer wall 10: an existing exterior material 30 that is attached to the outer wall 10 with a space on the outside of the outer wall 10; multiple vertical furring strips 26 that are horizontally arrayed between the outer wall 10 and the existing exterior material 30; an upper seal 22 that is interposed between the existing exterior material 30 and the outer wall 10 in the space between the adjacent multiple vertical furring strips 26, blocking the top-end opening of the cavity between the existing exterior material 30 and the outer wall 10; a lower seal 24 that is interposed between the existing exterior material 30 and the outer wall 10 in the space between the adjacent multiple vertical furring strips 26, blocking the bottom-end opening of the cavity between the existing exterior material 30 and the outer wall 10; a sealed layer 28 that is sealed with the existing exterior material 30, the outer wall 10, the vertical furring strips 26, the upper seal 22 and the lower seal 24; and a thermal insulation material 45 that is attached to the 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 6.

[0007] According to the invention of claim 1, there is provided an external thermal 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 plurality of vertical furring strips (26) extending vertically between the exterior wall (10) and the existing exterior material (30) and arranged horizontally at intervals; and an upper portion sandwiched between the existing exterior material (30) and the exterior wall (10) between adjacent ones of the plurality of vertical furring strips (26), disposed near an upper end of the existing exterior material (30), and closing an opening at an upper end of a cavity between the existing exterior material (30) and the exterior wall (10). An external insulation structure is provided, which is characterized by comprising: a seal (22); a lower seal (24) that is sandwiched between the existing exterior material (30) and the exterior wall (10) between adjacent ones of the multiple vertical furring strips (26) and is positioned toward the lower end of the existing exterior material (30) and closes the opening at the upper end of the cavity between the existing exterior material (30) and the exterior wall (10); a sealing layer (28) sealed by the existing exterior material (30), the exterior wall (10), the vertical furring strips (26), the upper seal (22) and the lower seal (24); and an insulation material (45) attached to the existing exterior material (30).

[0008] According to the invention of claim 5, there is provided a manufacturing method for an external insulation structure of a building, comprising an upper sealing process for sealing the upper openings of cavities between adjacent pairs of vertical furring strips (26) extending vertically and arranged at intervals laterally between an existing exterior material (30) spaced away from an exterior wall (10) toward the outdoors with an upper seal (22), a lower sealing process for sealing the lower openings of the cavities between adjacent pairs of vertical furring strips (26) with a lower seal (24), and an exterior cladding process for attaching an insulating material (45) to the existing exterior material (30).

[0009] According to the invention as set forth in claim 1 or 5, the existing exterior material (30) remains without being removed, thereby reducing the generation of waste. Since the sealing layer (28) between the existing exterior material (30) and the exterior wall (10) is sealed by the vertical furring strips (26), the upper seal (22), and the lower seal (24), air is trapped in the sealing layer (28). Therefore, the sealing layer (28) has thermal insulation properties. Since such a sealing layer (28) exists between the existing exterior material (30) and the exterior wall (10) and the insulation material (45) is attached to the existing exterior material (30), the insulation performance of the exterior insulation structure is high. Even if the insulation performance of the insulation material (45) is low because the insulation material (45) is thin, etc., the sealing layer (28) compensates for the lack of insulation performance. The sealing layer (28) contributes to the thinness of the insulation material (45) and the high insulation properties of the exterior insulation structure, and thus contributes to the thinness of the exterior insulation structure.

[0010] According to the invention of claim 2, there is provided an external insulation structure as described in claim 1, further comprising an exterior material (70) attached to the insulation material (45) outdoors.

[0011] According to the invention of claim 6, there is provided an external insulation structure, which is the manufacturing method described in claim 5, and is characterized in that it further includes an exterior decoration process of attaching an exterior decoration material (70) to the insulation material (45) outdoors.

[0012] According to the invention as defined in claim 2 or 6, 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.

[0013] According to the invention of claim 3, there is provided an external insulation structure as described in claim 2, 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).

[0014] According to the invention of claim 7, there is provided the manufacturing method as recited in claim 6, characterized in that in the exterior packaging step, the exterior material (70) is separated from the insulation material (45) to form an air-permeable layer (60) between the insulation material (45) and the exterior material (70).

[0015] According to the invention of claim 3 or 7 as described above, when the humidity inside the exterior wall (10), the sealing layer (28), the existing exterior material (30), and the insulation material (45) increases, the moisture is discharged from inside the exterior wall (10), the sealing layer (28), the existing exterior material (30), and the insulation material (45) to the ventilation layer (60). Therefore, condensation inside the exterior wall (10), the sealing layer (28), the existing exterior material (30), and the insulation material (45) is prevented, and deterioration of the exterior wall (10), the existing exterior material (30), and the insulation material (45) is prevented.

[0016] According to the invention of claim 4, 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).

[0017] According to the invention of claim 8, there is provided a manufacturing method as described in any one of claims 5 to 7, characterized in that in the exterior covering process, the insulation material (45) is adhered to the existing exterior material (30).

[0018] According to the invention as defined in claim 4 or 8, since the heat insulating material (45) is adhered to the existing exterior material (30), the heat insulating material (45) is firmly attached to the existing exterior material (30). Effect of the Invention

[0019] 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]

[0020] [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] 1 is an explanatory diagram of a hole punching process, an upper sealing process, a lower sealing process, and an exterior pasting process. [Figure 6] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] 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.

[0022] <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.

[0023] The external insulation structure includes an existing exterior wall 10, an existing waterproof / breathable sheet 20, an upper seal 22, a lower seal 24, vertical furring strips 26, a sealing layer 28, an existing exterior material 30, a heat insulating material 45, a waterproof / breathable sheet 50, vertical furring strips 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, the vertical furring strips 26, and the existing exterior material 30 were installed before the renovation, and the seals 22, 24, the heat insulating material 45, the waterproof / breathable sheet 50, the vertical furring strips 55, the ventilation layer 60, the exterior material 70, and the water cutout 75 were newly installed during the renovation. By installing the seals 22, 24, the existing ventilation layer 90 described below becomes the sealing layer 28.

[0024] 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.

[0025] 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 extending horizontally 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.

[0026] 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.

[0027] 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 plurality of vertical furring strips 26 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 vertical furring strips 26 are sandwiched between the existing exterior material 30 and the existing exterior wall 10, and the existing exterior material 30 is fixed to these vertical furring strips 26. The vertical furring strips 26 extend in the vertical direction and are fixed to the exterior surface of the existing exterior wall 10 by screws, adhesive, or the like. These vertical furring strips 26 are arranged along the existing exterior wall 10 at intervals. The vertical furring strips 26 function as spacers that form intervals between the existing exterior material 30 and the existing exterior wall 10.

[0028] The upper seal 22 is sandwiched between the existing exterior material 30 and the existing exterior wall 10, between adjacent vertical furring strips 26. The upper seal 22 is disposed toward the upper end of the existing exterior material 30. The upper seal 22 closes the opening at the upper end of the cavity between the existing exterior material 30 and the existing exterior wall 10.

[0029] The lower seal 24 is sandwiched between the existing exterior material 30 and the existing exterior wall 10, between adjacent vertical furring strips 26. The lower seal 24 is disposed near the lower end of the existing exterior material 30. The lower seal 24 closes the opening at the lower end of the cavity between the existing exterior material 30 and the existing exterior wall 10. The seals 22, 24 are made of plastic, foam, synthetic rubber or silicone rubber.

[0030] The sealing layer 28 is a cavity sealed by the seals 22, 24, the vertical furring strips 26, the existing exterior material 30, and the existing exterior wall 10. Specifically, the existing exterior material 30 covers the sealing layer 28 from the outside, the existing exterior wall 10 covers the sealing layer 28 from the inside, the vertical furring strips 26 block the sides of the sealing layer 28 from the sides, the upper seal 22 blocks the upper end of the sealing layer 28 from above, and the lower seal 24 blocks the lower end of the sealing layer 28 from below. Since the air in the sealing layer 28 is trapped by the seals 22, 24, the vertical furring strips 26, the existing exterior material 30, and the existing exterior wall 10, the sealing layer 28 has heat insulating properties. Adjacent sealing layers 28 are separated by the vertical furring strips 26 between them. A desiccant may be contained in the sealing layer 28.

[0031] 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. The screws may reach the existing exterior wall 10, or may not reach the existing exterior wall 10. The screws 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] <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.

[0039] 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.

[0040] (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.

[0041] (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.

[0042] (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.

[0043] (4) Top sealing process and bottom sealing process 5, uncured resin, synthetic rubber, silicone rubber or foam material is injected into the opening at the upper end of the existing ventilation layer 90, and the opening at the upper end of the existing ventilation layer 90 is sealed with the resin, synthetic rubber, silicone rubber or foam material. At this time, the uncured resin, synthetic rubber, silicone rubber or foam material may be injected into the opening at the upper end of the existing ventilation layer 90 from the cavity 82 above the eaves material 82. Alternatively, the upper end of the existing exterior material 30 may be cut off, and then the uncured resin, synthetic rubber, silicone rubber or foam material may be injected into the opening at the upper end of the existing ventilation layer 90 from outdoors through the cut part. The upper seal 22 is formed by hardening the resin, synthetic rubber, silicone rubber or foam material.

[0044] Uncured resin, synthetic rubber, silicone rubber or foam material is injected into the opening at the lower end of the existing ventilation layer 90, and the opening at the lower end of the existing ventilation layer 90 is sealed with the resin, synthetic rubber, silicone rubber or foam material. The lower seal 24 is formed by hardening the resin, synthetic rubber, silicone rubber or foam material.

[0045] By installing the upper seal 22 and the lower seal 24 as described above, the existing ventilation layer 90 is sealed, and the existing ventilation layer 90 becomes the sealed layer 28.

[0046] In addition, a desiccant may be placed in the existing ventilation layer 90 before the upper seal 22 or the lower seal 25, or both, are installed.

[0047] A dry method may be used instead of the wet method. That is, a dry joint as the upper seal 22 may be fitted into the opening at the upper end of the existing ventilation layer 90, or a dry joint as the lower seal 22 may be fitted into the opening at the upper end of the existing ventilation layer 90. The dry joint refers to a pre-cured resin, synthetic rubber, silicone rubber, or foam material. In this case, the dry joint may be bonded to the existing exterior material 30 and the existing exterior wall 10 by an adhesive.

[0048] (5) Exterior cladding process Next, as shown in Fig. 5, the 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 insulating material 45, or both, and the insulating material 45 may be bonded to the existing exterior material 30 by the adhesive. The insulating material 45 may be directly fixed to the existing exterior material 30 by fasteners such as screws or metal fittings, or the insulating material 45 may be indirectly fixed to the existing exterior material 30 by directly fixing the insulating material 45 to the existing exterior wall 10 by fasteners such as screws or metal fittings. Screws may be driven into the insulating material 45 and the existing exterior material 30 from outside.

[0049] Next, the waterproof / breathable sheet 50 is attached to the heat insulating material 45.

[0050] (6) Exterior process Next, as shown in FIG. 6, the vertical furring strips 55 are 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.

[0051] (7) 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.

[0052] <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.

[0053] The insulating performance of the external insulation structure is high because the insulating sealing layer 28 is provided between the existing exterior material 30 and the existing exterior wall 10, and the insulating material 45 is attached to the existing exterior material 30. Even if the insulating material 45 is thin and has low insulating performance, the sealing layer 28 compensates for the lack of insulating performance. Therefore, the sealing layer 28 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.

[0054] 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.

[0055] 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 sealing layer 28, the existing exterior material 30, and the insulation material 45 increases, the moisture is discharged from the existing exterior wall 10, the sealing layer 28, 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, the moisture is discharged from the ventilation layer 60. Therefore, condensation inside the existing exterior wall 10, the sealing layer 28, the existing exterior material 30, the insulation material 45, and the existing exterior wall 10 is prevented, and deterioration of the existing exterior wall 10, the existing exterior material 30, and the insulation material 45 is prevented.

[0056] 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]

[0057] 10 Existing exterior wall 22 Upper seal 24 Lower Seal 26 Vertical furring strip 28 Sealing layer 30 Existing exterior materials 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 plurality of vertical furring strips extending vertically between the exterior wall and the existing exterior material and arranged horizontally at intervals; An upper seal is sandwiched between the existing exterior material and the exterior wall between adjacent vertical furring strips and disposed near the upper end of the existing exterior material to close an opening at the upper end of a cavity between the existing exterior material and the exterior wall; A lower seal is sandwiched between the existing exterior material and the exterior wall between adjacent vertical furring strips, and is disposed toward the lower end of the existing exterior material to close an opening at the upper end of a cavity between the existing exterior material and the exterior wall; A sealing layer sealed by the existing exterior material, the exterior wall, the vertical furring strip, the upper seal, and the lower seal; A heat insulating material attached to the existing exterior material; An external insulation structure comprising:

2. The external insulation structure according to claim 1, The device further includes an exterior material attached to the heat insulating material outdoors. An external insulation structure.

3. The external insulation structure according to claim 2, 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.

4. 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.

5. A method for manufacturing an exterior insulation structure of a building, comprising: an upper sealing process for sealing, with an upper seal, openings at the upper ends of cavities between adjacent vertical furring strips that extend vertically between the exterior wall and the exterior wall and are arranged at intervals in the horizontal direction; A lower sealing process of sealing the openings of the lower ends of the cavities between adjacent ones of the plurality of vertical furring strips with a lower seal; An exterior cladding process of attaching a heat insulating material to the existing exterior material; A manufacturing method comprising the steps of:

6. The method according to claim 5, An exterior covering step of attaching an exterior covering to the heat insulating material outdoors. The method further comprises:

7. The method according to claim 6, 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:

8. The method according to any one of claims 5 to 7, In the exterior cladding process, the heat insulating material is adhered to the existing exterior material. A manufacturing method comprising the steps of:

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