External 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

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[0001] The present invention relates to an external insulation structure and a manufacturing method.

Background Art

[0002] Patent Document 1 discloses a reform technology for improving the heat insulation performance of existing wooden houses. Specifically, a part of the existing exterior material installed on the outer wall of an existing wooden house is cut off, and then the cut-off part is closed with a structural facing material. Next, a heat insulating material is attached to the outer surface of the structural facing material. Then, a body edge is installed on the outer surface of the heat insulating material. Next, a new exterior material is installed on the body edge.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technology described in Patent Document 1, the cut-off existing exterior material must be discarded as waste. The generation of waste has become a social problem from the perspective of the environment and the like. In addition, in order to sufficiently insulate a house with the newly installed heat insulating material, the heat insulating material needs to have high heat insulation performance, and the heat insulating material becomes thick.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an external insulation structure and a manufacturing method that can suppress the generation of waste and achieve high heat insulation.

Means for Solving the Problems

[0006] <000​​​​According to the invention of claim 1, an external insulation structure for a building, comprising: an exterior wall (10); an existing exterior material (30) attached to the exterior wall (10) spaced apart from the exterior wall (10) toward the outside; an insulation layer (25) filled between the existing exterior material (30) and the exterior wall (10); and an insulation material (45) attached to the existing exterior material (30), Blocking material (40), Equipped with The existing exterior material (30) has a hole (32) that penetrates the existing exterior material (30), the closing material (40) is fitted into the hole (32) to close the hole (32), the closing material (40) is fixed to the exterior wall (10), and the insulation material (45) is fixed to the closing material (40). An external insulation structure characterized by the above is provided.

[0008] According to the invention of claim 1 described above, since the existing exterior material (30) remains without being removed, the generation of waste is suppressed. Because the insulation layer (25) is filled 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 material (45) has low insulation performance due to reasons such as being thin, the insulation layer (25) compensates for the lack of insulation performance. The insulation layer (25) contributes to the thinness of the insulation material (45) and the high insulation performance of the exterior insulation structure, and in turn contributes to the thinness of the exterior insulation structure. The sealing material (40) contributes to protecting the insulation layer (25) filled between the existing exterior material (30) and the exterior wall (10).

[0011] Claim 2 According to the invention, 1 An external insulation structure is provided, characterized in that the insulation material (45) is fixed to the sealing material (40) by driving screws (42) into the insulation material (45) and the sealing material (40) from outside the insulation material (45).

[0012] The above Claim 2 According to the invention relating to this invention, the screw (42) contributes to the secure attachment of the insulation material (45) to the existing exterior material (30).

[0013] Claim 3 According to the invention, 2 An external insulation structure is provided, characterized in that the screws (42) reach the outer wall (10) and are driven into the outer wall (10).

[0014] The above Claim 3 According to the invention, the screws (42) that reach the exterior wall (10) contribute to the secure attachment of the insulation material (45) to the existing exterior material (30).

[0015] Claim 4 According to the invention relating to this invention, an external insulation structure is provided, which is an external insulation structure according to any one of claims 1 to 3, characterized in that the insulation material (45) is bonded to the existing exterior material (30).

[0016] The above Claim 4 According to the invention relating to this invention, since the heat insulating material (45) is bonded to the existing exterior material (30), the heat insulating material (45) is firmly attached to the existing exterior material (30). to It is installed.

[0017] Claim 5 According to the invention relating to this, an external insulation structure is provided, which is an external insulation structure according to any one of claims 1 to 3, further comprising an exterior material (70) attached to the insulation material (45) outdoors.

[0018] The above Claim 5 According to the invention, the exterior material (70) protects the insulation material (45) from sunlight, outside air, wind and rain, etc. The exterior material (70) contributes to improving the aesthetic design of the building.

[0019] Claim 6 According to the invention, 5 An external insulation structure is provided, characterized in that the exterior material (70) is spaced apart from the insulation material (45), thereby further comprising a ventilation layer (60) formed between the insulation material (45) and the exterior material (70).

[0020] The above Claim 6According to the invention related thereto, when the humidity inside the outer wall (10), the heat insulation layer (25), the existing exterior material (30), and the heat insulation material (45) rises, moisture is discharged from inside the outer wall (10), the heat insulation layer (25), the existing exterior material (30), and the heat insulation material (45) to the ventilation layer (60). Therefore, condensation inside the outer wall (10), the heat insulation layer (25), the existing exterior material (30), and the heat insulation material (45) is prevented, and deterioration of the outer wall (10), the heat insulation layer (25), the existing exterior material (30), and the heat insulation material (45) is prevented.

[0021] Claim 7 According to the invention related thereto, a method for manufacturing an external heat insulation structure of a building, comprising: an injection step of forming a heat insulation layer (25) composed of small pieces or foamed resin (26) in a cavity (90) between an existing exterior material (30) attached to the outer wall (10) and spaced apart from the outer wall (10) toward the outside of the building and the outer wall (10) by injecting small pieces of heat insulation material or foamed resin (26) into the cavity (90); and an external attachment step of attaching a heat insulation material (45) to the existing exterior material (30). A drilling process in which a hole (32) is made in the existing exterior material (30) from the outside to the cavity (90), including Furthermore, in the injection step, the small mass or the foamed resin (26) is injected into the cavity (90) through the hole (32). A manufacturing method characterized by the above is provided.

[0022] According to the invention related to claim 7 as described above, since the existing exterior material (30) remains without being removed, generation of waste is suppressed. Since the heat insulation layer (25) is filled between the existing exterior material (30) and the outer wall (10), and the heat insulation material (45) is attached to the existing exterior material (30), the heat insulation performance of the external heat insulation structure is high. Even if the heat insulation performance of the heat insulation material (45) is low due to reasons such as the heat insulation material (45) being thin, the heat insulation layer (25) compensates for the lack of heat insulation performance. The heat insulation layer (25) contributes to the thinness of the heat insulation material (45) and the high heat insulation property of the external heat insulation structure, and thus contributes to the thinness of the external heat insulation structure. By injecting small lumps or foamed resin (26) into the cavity (90) through the holes (32), the foamed resin (26) is injected into every corner of the cavity (90). Therefore, construction defects of the insulation layer (25) are prevented, and large voids do not occur in the insulation layer (25).

[0025] Claim 8 According to the invention related thereto, claim 7A manufacturing method is provided, characterized in that, after the injection step, a sealing step is provided in which a sealing material (40) is fitted into the hole (32) to seal the hole (32) with the sealing material (40), and in the outer covering step, the heat insulating material (45) is fixed to the sealing material (40).

[0026] Claim 9 According to the invention, 8 A manufacturing method is provided, characterized in that the sealing material (40) is fixed to the outer wall (10) in the outer lining step or the sealing step.

[0027] The above Claim 8,9 According to the invention relating to this invention, The insulation material (45) is attached to the existing exterior material (30) It can be securely attached.

[0028] Claim 10 According to the invention, 8 A manufacturing method is provided as described above, characterized in that in the external fastening step, screws (42) are driven into the insulating material (45) and the sealing material (40) from the outside of the insulating material (45) to fix the insulating material (45) to the sealing material (40).

[0029] The above Claim 10 According to the invention relating to this invention, the screw (42) contributes to the secure attachment of the insulation material (45) to the existing exterior material (30).

[0030] Claim 11 According to the invention, 10 A manufacturing method is provided, characterized in that the screws (42) are driven into the outer wall (10).

[0031] The above Claim 11 According to the invention, the screws (42) that reach the exterior wall (10) contribute to the secure attachment of the insulation material (45) to the existing exterior material (30).

[0032] Claim12 According to the invention, 8 from 11 A manufacturing method is provided according to any one of the above, characterized in that the thermal insulation material (45) is bonded to the existing exterior material (30) in the exterior application step.

[0033] The above Claim 12 According to the invention relating to this invention, Insulation material (45) is the existing exterior material (30) It is securely attached to it.

[0034] Claim 13 According to the invention, 7 from 11 The following items Manufacturing method The provided manufacturing method further includes an exterior finishing step of attaching an exterior finishing material (70) to the thermal insulation material (45) outdoors.

[0035] The above Claim 13 According to the invention, the exterior material (70) protects the insulation material (45) from sunlight, outside air, wind and rain, etc. The exterior material (70) contributes to improving the aesthetic design of the building.

[0036] Claim 14 According to the invention relating to this, the manufacturing method described in claim 13, wherein in the exterior finishing step, the exterior material (70) is separated from the heat insulating material (45) between the heat insulating material (45) and the exterior material (70) To A manufacturing method is provided, characterized by the formation of a gas layer (60).

[0037] The above Claim 14 According to the invention, when the humidity inside the exterior wall (10), insulation layer (25), existing exterior material (30), and insulation material (45) rises, moisture is discharged from inside the exterior wall (10), insulation layer (25), existing exterior material (30), and insulation material (45) into the ventilation layer (60). As a result, condensation inside the exterior wall (10), insulation layer (25), existing exterior material (30), and insulation material (45) is prevented, and deterioration of the exterior wall (10), insulation layer (25), existing exterior material (30), and insulation material (45) is prevented. [Effects of the Invention]

[0038] According to the present invention, waste generation can be suppressed. The external insulation structure has high thermal insulation performance. The insulation material and external insulation structure can be made thinner. [Brief explanation of the drawing]

[0039] [Figure 1] This is a vertical cross-sectional view of the building's external insulation structure. [Figure 2] This is a horizontal cross-sectional view of the side of the building's external insulation structure. [Figure 3] This is a vertical cross-sectional view of the building's exterior wall and existing exterior materials before renovation. [Figure 4] This is an explanatory diagram of the rainproofing process. [Figure 5] This is an explanatory diagram of the drilling process, injection process, and sealing process. [Figure 6] This is an explanatory diagram of the exterior cladding process. [Figure 7] This is an explanatory diagram of the exterior finishing process. [Modes for carrying out the invention]

[0040] Embodiments will be described below 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 scope of the present invention is not limited to the examples in the drawings, as the drawings are provided for illustrative purposes only.

[0041] <1. External Insulation Structure> Figure 1 is a vertical cross-sectional view showing the external insulation structure of the building. The building is a wooden house with a wall structure. A wall structure refers to a structure in which the building is supported by planar structures such as walls and floors. More specifically, the building is a wooden house constructed using the wood panel construction method. Alternatively, the building may be a wooden house with a wall structure constructed using the wood frame wall construction method. Alternatively, the building may be a wooden house with a rigid frame structure constructed using the wood 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 its thermal insulation performance has been improved as a result of the renovation. In other words, the building's external insulation structure was added during the renovation.

[0042] The exterior insulation structure includes an existing exterior wall 10, an existing waterproof and breathable sheet 20, an insulation layer 25, existing exterior cladding 30, a sealing material 40, insulation material 45, a waterproof and breathable sheet 50, vertical furring strips 55, a ventilation layer 60, exterior cladding 70, and flashing 75. The existing exterior wall 10, existing waterproof and breathable sheet 20, and existing exterior cladding 30 were installed before the renovation, while the insulation layer 25, sealing material 40, insulation material 45, waterproof and breathable sheet 50, vertical furring strips 55, a ventilation layer 60, exterior cladding 70, and flashing 75 were newly installed during the renovation.

[0043] The existing exterior wall 10 is installed on the foundation 12. A horizontal intervening material 15 is laid on the upper end of the foundation 12 and may also be sandwiched between the existing exterior wall 10 and the foundation 12. The intervening material 15 is, for example, a ventilation base ring. The ventilation base ring has numerous ventilation holes that lead from the underfloor space of the first floor to the outside.

[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 hollow wooden panels. Specifically, the wall panel 11 has a rectangular frame 11a having a pair of vertical frames and a pair of horizontal frames, two facing materials 11b and 11c that cover the inside of the rectangular frame by being attached to the front and back surfaces, respectively, of the rectangular frame, and one or more auxiliary battens assembled vertically, horizontally, or vertically and horizontally inside the rectangular frame. Insulation material may be filled between the two facing materials. The wall panels 11 on the first floor are arranged horizontally on a horizontal sill plate 13 on the foundation 12, and adjacent wall panels 11 in the horizontal direction are joined to each other. A horizontal girder 14 is joined to the upper end of the wall panels 11 on the first floor. The wall panels 11 on the second floor are arranged horizontally on the girder 14, and adjacent wall panels 11 in the horizontal direction are joined to each other. Furthermore, if the building is a wooden house with a rigid frame structure constructed using a wooden frame construction method, the existing exterior wall 10 has multiple studs, sheathing attached to those studs from the outside, and sheathing attached to those studs from the inside.

[0045] The existing waterproof and breathable 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 side facing the outdoors, and the inner surface of the existing exterior wall 10 refers to the side facing the indoors. In Figure 1, the existing waterproof and breathable sheet 20 is shown separated from the outer surface of the existing exterior wall 10, but in reality, the existing waterproof and breathable sheet 20 is in contact with the outer surface of the existing exterior wall 10.

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

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

[0048] The existing exterior material 30 has multiple holes 32 that penetrate from its outer surface to its inner surface. The outer surface of the existing exterior material 30 is the surface facing the outdoors, and the inner surface of the existing exterior material 30 is the surface facing the indoors. The holes 32 are used to fill the space between the existing exterior material 30 and the existing exterior wall 10 with foamed resin before it hardens.

[0049] The sealing material 40 is fitted into the hole 32 to seal it. The sealing material 40 is, for example, wood or metal. The sealing material 40 is fixed to the existing exterior wall 10 by screws, which may be screws 42 described later. The sealing material 40 may be applied to the outer surface of the existing exterior wall 10 via the existing waterproof breathable sheet 20, or the insulation layer 25 may be sandwiched between the sealing material 40 and the outer surface of the existing exterior wall 10. A portion of the insulation layer 25 may be embedded in the hole 32 as the sealing material 40.

[0050] The insulation material 45 is attached to the outer surface of the existing exterior material 30. The method of attaching the insulation material 45 to the existing exterior material 30 can be any method, and the insulation material 45 is supported, attached, fixed, or bonded to the existing exterior material 30. The insulation material 45 may be directly fixed to the existing exterior material 30 by fasteners such as screws or metal fittings, or it 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 from the outside into the insulation material 45 and the existing exterior material 30. For example, screws 42 are driven from the outside into the insulation material 45 and the sealing material 40. Screws 42 may or may not reach the existing exterior wall 10. Screws 42 contribute to the firm fixation of the insulation material 45. For example, an adhesive such as a special putty bond may be applied to the outer surface of the existing exterior material 30, and the insulation 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 will fill the recesses in the outer surface of the existing exterior material 30, thus helping to suppress the formation of gaps between the insulation material 45 and the existing exterior material 30.

[0051] The insulation material 45 consists of, for example, phenolic foam, polystyrene foam, glass wool, rock wool, urethane foam, polyolefin foam, or cellulose fiber.

[0052] The insulation material 45 may consist of multiple standardized rectangular or square insulation modules installed along the outer surface of the existing exterior material 30. The side length of the insulation module is an integer multiple of a standard length, such as 910 mm or 1000 mm. The insulation module may have a rectangular frame, a facing material attached to one or both sides of the rectangular frame, and an insulating material (e.g., phenolic foam, polystyrene foam, glass wool, rock wool, urethane foam, polyolefin foam, or cellulose fiber) filled inside the rectangular frame. When multiple insulation modules are used in the insulation material 45, and the end of the insulation material 45 is located at an outside corner of the building, an insulating fitting may be attached to that end.

[0053] The waterproof and breathable sheet 50 is attached to the outer surface of the insulation material 45. The outer surface of the insulation material 45 refers to the side facing the outdoors, and the inner surface of the insulation material 45 refers to the side facing the indoors. In Figure 1, the waterproof and breathable sheet 50 is shown separated from the outer surface of the insulation material 45, but in reality, the waterproof and breathable sheet 50 is in contact with the outer surface of the insulation material 45.

[0054] The exterior cladding 70 is attached to the insulation material 45, away from the waterproof and breathable sheet 50 and the insulation material 45, towards the outside. Specifically, multiple vertical furring strips 55 are attached to the insulation material 45 from the outside side of the waterproof and breathable sheet 50, and these vertical furring strips 55 are sandwiched between the exterior cladding 70 and the insulation material 45, fixing the exterior cladding 70 to these vertical furring strips 55. These vertical furring strips 55 extend in the vertical direction and are arranged horizontally at intervals. These vertical furring strips 55 function as spacers that form a gap between the exterior cladding 70 and the insulation material 45. A cavity is formed between the exterior cladding 70 and the insulation material 45, and this cavity is a ventilation layer 60. The lower end of the ventilation layer 60 is open and leads to the outside, and the upper end of the ventilation layer 60 leads to the cavity 82 above the soffit material 80 and the ceiling space of the second floor through ventilation holes 81 in the soffit material 80. In addition, the upper end of the exterior material 70 may be separated downward from the soffit material 80, and the upper end of the ventilation layer 60 may be open to the outside. In this case, the ventilation holes 81 are not formed.

[0055] The flashing 75 is installed beneath the insulation 45, the ventilation layer 60, and the exterior cladding 70. The flashing 75 is fixed, for example, to the lower end of the existing exterior cladding 30. The flashing 75 slopes downward outward and is separated from the exterior cladding 70. The lower end of the ventilation layer 60 is not blocked by the flashing 75 and is open.

[0056] The external insulation structure shown in Figure 1 may be provided around the entire perimeter of the house, or it may be provided only around a part of the perimeter of the house.

[0057] As shown in Figure 2, when the exterior material 70 and insulation material 45 are adjacent to the sash 85, the edges of the exterior material 70 and insulation material 45 closer to the sash 85 are covered by the trim material 77. The trim material 77 is positioned on the outdoor side of the existing trim material 87 embedded 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. Since the trim material 77 and the existing trim material 87 are provided in a box shape with a hollow interior, the trim material 77 and the existing trim material 87 are also called a casing.

[0058] <2. Manufacturing method for external insulation structure> This section explains the manufacturing method for external insulation structures, that is, the method for renovating the exterior walls of buildings.

[0059] As shown in Figure 3, before the renovation, the existing waterproof and breathable sheet 20 was attached to the outer surface of the existing exterior wall 10, the existing exterior material 30 was attached to the existing exterior wall 10, away from the existing waterproof and breathable sheet 20 and the existing exterior wall 10 toward the outside, and the existing ventilation layer 90 as a cavity was 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 leads to the outside. The upper end of the existing ventilation layer 90 leads to the cavity 82 above the soffit material 80 and to the ceiling space of the second floor.

[0060] (1) Washing process First, the existing exterior material 30 is cleaned. Additionally, the existing flashing 75 located below the existing exterior material 30 will be removed.

[0061] (2) Rainproofing process Next, as shown in Figure 4, multiple support columns 100 are erected on the ground at a location away from the existing exterior material 30, and these support columns 100 are arranged horizontally along the existing exterior material 30. Scaffolding support columns may be used for the support columns 100. A temporary roof 101 is placed between the upper ends of these support columns 100 and the building's roof 110, and the temporary roof 101 is fixed to the support columns 100. Scaffolding planks may be used for the temporary roof 101. A recess 102 is formed on the underside of the temporary roof 101 for the upper ends of the support columns 100 to catch on. A buffer material 103 is provided on the edge of the underside of the temporary roof 101 to protect the building's roof 110. The buffer material 103 is made of rubber, for example. By installing such a temporary roof 101, the renovation work can proceed even if it rains during the renovation period, and materials and the existing exterior material 30 will not get wet in the rain.

[0062] (3) Drilling process Next, as shown in Figure 5, ventilation holes 81 are made in the soffit material 80 at a position away from the existing exterior material 30 by the thickness of the insulation material 45. Note that it is not necessary to form ventilation holes 81. Next, a hole 32 is made in the existing exterior material 30 from the outside to the existing ventilation layer 90. For example, a hole saw is used to make the opening of the hole 32.

[0063] (4) Injection process Next, as shown in Figure 5, the 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 into the existing ventilation layer 90 using the spray nozzle. The foamed resin 26 may also be injected into the existing ventilation layer 90 through the opening at the lower end of the existing ventilation layer 90. The foamed resin 26 may also be injected into the existing ventilation layer 90 through the opening at the upper end of the existing ventilation layer 90 from the cavity 82 above the soffit material 80. Note that if the foamed resin 26 is injected into the existing ventilation layer 90 through the opening at the lower end, upper end, or both of these ends, the entire existing ventilation layer 90 will be filled with the foamed resin 26, and therefore the hole 32 does not need to be made. The foamed resin 26 injected into the existing ventilation layer 90 hardens to form the insulation layer 25.

[0064] Alternatively, small lumps of insulating material (e.g., phenolic 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 lumps of insulating material may be cotton-like. The lumps of insulating material may be injected into the existing ventilation layer 90 through the holes 32 by an air blast method or the like. The lumps of insulating material may be injected into the existing ventilation layer 90 through the opening at the lower end of the existing ventilation layer 90 by an air blast method or the like. The lumps of insulating material may be injected into the existing ventilation layer 90 through the opening at the upper end of the existing ventilation layer 90 from the cavity 82 above the soffit material 80 by an air blast method or the like. When the lumps of insulating material fill the existing ventilation layer 90, an insulating layer 25, which is an aggregate of lumps of insulating material, is formed. Before or after the injection of the lumps of insulating material, the opening at the lower end of the existing ventilation layer 90 may be sealed with a resin or wood sealant.

[0065] (5) Closure process Next, as shown in Figure 5, the sealing material 40 is fitted into the hole 32 to seal the hole 32. At this time, the sealing material 40 may be fixed to the existing exterior wall 10 by driving screws into the sealing material 40 and the existing exterior wall 10. Alternatively, the sealing material 40 may be fitted into the hole 32 before the foamed resin 26 hardens, and the sealing material 40 may be bonded and fixed to the existing exterior wall 10 by the hardening of the foamed resin 26. Fixing the sealing material 40 with screws and fixing the sealing material 40 with the foamed resin 26 may be used in combination, or one of them may be used. In addition, when forming the insulation layer 25, the foamed resin 26 may also be filled into the hole 32, and the foamed resin 26 inside the hole 32 may harden to become the sealing material 40.

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

[0067] Next, attach the waterproof and breathable sheet 50 to the insulation material 45.

[0068] (7) Exterior process Next, as shown in Figure 7, multiple vertical furring strips 55 are arranged horizontally at intervals, and these vertical furring strips 55 are attached to the insulation material 45 from the outside of the waterproof and breathable sheet 50. Next, the exterior material 70 is fixed to the vertical furring strips 55 so as to be separated from the waterproof and breathable sheet 50 and the insulation material 45, thereby forming a ventilation layer 60 between the exterior material 70 and the insulation material 45. If ventilation holes 81 are formed, the opening at the upper end of the ventilation layer 60 is passed through the ventilation holes 81 when installing the exterior material 70. If ventilation holes 81 are not formed, the upper end of the exterior material 70 is separated from the soffit material 80 when installing the exterior material 70.

[0069] (8) Finishing process Next, the flashing 75 is positioned away from the insulation material 45 and the ventilation layer 60, and fixed to, for example, the lower end of the existing exterior material 30. Next, the edges of the exterior material 70 and insulation material 45 near the sash 85 are covered with the trim material 77, and the existing trim material 87 embedded between the sash frame 86 of the sash 85 and the existing exterior material 30 is also covered with the trim material 77. The trim material 77 may be fixed to the insulation material 45, the exterior material 70, or the existing trim material 87. Next, the temporary roof 101 and support columns 100 are removed.

[0070] <3. Summary> Since the existing exterior materials 30 and existing waterproof and breathable sheets 20 remain in place, waste generation is minimized. Furthermore, because there is no need to remove the existing exterior materials 30 and existing waterproof and breathable sheets 20, construction time, labor, and costs are reduced.

[0071] Because the insulation layer 25 is filled between the existing exterior material 30 and the existing 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 material 45 is thin and has low insulation performance, the insulation layer 25 compensates for the lack of insulation performance. Therefore, the insulation layer 25 contributes to the thinness of the insulation material 45 and the high insulation performance of the exterior insulation structure, and in turn contributes to the thinness of the exterior insulation structure.

[0072] The sealing material 40 is fitted into the hole 32 in the existing exterior material 30, thereby sealing the hole 32, and the insulation layer 25 is protected by the sealing material 40 and the existing exterior material 30.

[0073] Because the insulation material 45 is fixed to the sealing material 40 by screws 42, the insulation material 45 is firmly attached to the existing exterior material 30. In particular, even if it is difficult to drive screws into the existing exterior material 30, the insulation material 45 is firmly attached to the existing exterior material 30.

[0074] Since the sealing material 40 is fixed to the existing exterior wall 10 by screws 42, the sealing material 40 is less likely to come out of the hole 32, and the insulation material 45 is firmly attached to the existing exterior material 30.

[0075] Because the insulation material 45 is bonded to the existing exterior material 30 with adhesive, the insulation 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 on the outer surface of the existing exterior material 30, making it unlikely for gaps to form between the insulation material 45 and the existing exterior material 30.

[0076] Since the existing waterproof and breathable sheets 20 and 50 are breathable, when the humidity inside the existing exterior wall 10, insulation layer 25, existing exterior material 30, and insulation material 45 rises, moisture is discharged from inside the existing exterior wall 10, insulation layer 25, existing exterior material 30, and insulation material 45 into the ventilation layer 60. Since the ventilation layer 60 is connected to the cavity 82 above the soffit material 80 and to the outside, moisture is discharged from the ventilation layer 60. As a result, condensation inside the insulation layer 25, existing exterior material 30, insulation material 45, and existing exterior wall 10 is prevented, and deterioration of the insulation layer 25, existing exterior material 30, insulation material 45, and existing exterior wall 10 is prevented.

[0077] Since the foamed resin 26 is injected into the existing ventilation layer 90 through the holes 32 in the existing exterior material 30, the foamed resin 26 reaches every corner of the existing ventilation layer 90. As a result, large voids do not occur in the insulation layer 25, and construction defects in the insulation layer 25 are 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 Foamed resin 30 Existing exterior materials 32 holes 40 Occlusion material 45 Insulation 60 Ventilation layer 70 Exterior materials 90 Existing ventilation layer (cavity)

Claims

1. The building has an external insulation structure, The exterior walls and The existing exterior material attached to the exterior wall is spaced apart from the exterior wall toward the outside, An insulating layer filled between the existing exterior material and the exterior wall, The insulation material attached to the aforementioned existing exterior material, Blocking material and Equipped with, The aforementioned existing exterior material has a hole that penetrates it, The sealing material is fitted into the hole to close the hole. The sealing material is fixed to the outer wall, and the insulating material is fixed to the sealing material. An external insulation structure characterized by the following features.

2. The external insulation structure according to claim 1, The insulation material is fixed to the sealing material by driving screws into the insulation material and the sealing material from the outside of the insulation material. An external insulation structure characterized by the following features.

3. The external insulation structure according to claim 2, The aforementioned screws reach the exterior wall and are driven into the exterior wall. An external insulation structure characterized by the following features.

4. An external insulation structure according to any one of claims 1 to 3, The aforementioned insulation material is bonded to the existing exterior material. An external insulation structure characterized by the following features.

5. An external insulation structure according to any one of claims 1 to 3, The exterior material is further attached to the insulation material outdoors. An external insulation structure characterized by the following features.

6. The external insulation structure according to claim 5, The exterior material is further separated from the insulation material, thereby forming a ventilation layer between the insulation material and the exterior material. An external insulation structure characterized by the following features.

7. A method for manufacturing an external insulation structure for a building, An injection step in which small chunks of insulating material or foamed resin are injected into the cavity between the existing exterior material attached to the exterior wall and the exterior wall, spaced apart from the exterior wall toward the outside, thereby forming an insulating layer made of the small chunks or foamed resin in the cavity; An exterior application process in which insulation material is attached to the existing exterior material, A drilling process to make a hole in the existing exterior material from the outside to the cavity, Includes, In the injection step, the small lump or the foamed resin is injected into the cavity through the hole. A manufacturing method characterized by the following features.

8. A manufacturing method according to claim 7, The process further includes a sealing step in which a sealing material is fitted into the hole after the injection step to seal the hole with the sealing material, In the above-mentioned exterior coating process, the insulating material is fixed to the sealing material. A manufacturing method characterized by the following features.

9. A manufacturing method according to claim 8, In the aforementioned exterior lining step or the aforementioned closing step, the closing material is fixed to the outer wall. A manufacturing method characterized by the following features.

10. A manufacturing method according to claim 8, In the aforementioned exterior attachment process, screws are driven into the insulation material and the sealing material from the outside, thereby fixing the insulation material to the sealing material. A manufacturing method characterized by the following features.

11. A manufacturing method according to claim 10, Drive the aforementioned screws into the exterior wall. A manufacturing method characterized by the following features.

12. A manufacturing method according to any one of claims 8 to 11, In the exterior cladding process, the insulation material is bonded to the existing exterior material. A manufacturing method characterized by the following features.

13. A manufacturing method according to any one of claims 7 to 11, Exterior process of attaching exterior material to the insulation material outdoors A manufacturing method characterized by further comprising the following.

14. A manufacturing method according to claim 13, In the exterior finishing process, a ventilation layer is formed between the insulation material and the exterior finishing material by separating the exterior finishing material from the insulation material. A manufacturing method characterized by the following features.

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