JP2015028287A - Outer spread heat insulation structure and outer spread heat insulation method of wooden building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer spread heat insulation structure and an outer spread heat insulation method of a wooden building, capable of holding an outer wall over a long period, simplifying construction work, reducing cost, and improving fire resistance and heat insulation performance, by constituting the outer wall without using a backing material.SOLUTION: The outer spread heat insulation structure comprises structural plywood 15 installed on the outside of a structural material 13, a plurality of pressure-resistant heat insulation materials 16 fixed at a predetermined interval in the substantially horizontal direction to an outer surface of the structural plywood 15, an outer spread heat insulation material 17 fixed to an outer surface of the structural plywood 15 in a clearance-nonexistent state between the pressure-resistant heat insulation material 16 and itself and a furring strip 20 fixed to the structural material 13 by a fixing machine screw 19 from the outside of the pressure-resistant heat insulation material 16 and the outer spread heat insulation material 17.

Description

  The present invention relates to an outer heat insulation technique for a wooden building, and more particularly to an outer heat insulating structure for a wooden building and an outer heat insulating method for constructing a heat insulating material on the outside of a structural material such as a column or a stud.

  Conventionally, when installing thermal insulation on a wooden building, the base material is fixed in a lattice shape etc. on the structural plywood attached to the outside of the structural material, and the heat insulating material filled between the base materials is moisture permeable and waterproof sheet After covering with, the ventilator edge is fixed to the structural material (conventional method). Japanese Patent Application Laid-Open No. 2004-107927 also discloses a method of using a dedicated bracket instead of the base material (Patent Document 1).

JP 2004-107927 A

  However, in the conventional method, the total weight of the outer wall composed of the base material, the heat insulating material, the permeation / waterproof sheet, and the ventilator edge is supported by nails and screws that fix the ventilator edge to the structural material. For this reason, there is a problem that as the amount of the base material used increases, the total weight of the outer wall increases and the risk of the so-called “wall dripping” that the outer wall peels off increases.

  In addition, the conventional method requires a large amount of base material, nails, and the like, and it takes time to attach the base material, which raises the problem of high material costs and construction costs. Furthermore, since the base material used in the conventional construction method generates a heat bridge between the outer wall and the inner wall, there is also a problem that the heat insulating performance of the wooden building is deteriorated. In addition, in the external heat insulating method, since a foam-based heat insulating material is generally used, there is a problem that it is easy to burn in a fire or the like.

On the other hand, the dedicated bracket of Patent Document 1 also has a problem that the unit price is high because the shape and structure are complicated and there are many types. For example, the number of dedicated brackets required for a two-story house with a floor area of about 120 m ^{2 is} about several hundred to a thousand, and the screws required to fix each dedicated bracket are four times or more. Therefore, there is a current situation that the construction method using the dedicated bracket is not widely used because the material cost and construction cost are generally high.

  The present invention has been made to solve such problems, and can configure the outer wall for a long time without using a base material, and can maintain the outer wall for a long period of time. An object of the present invention is to provide an outer heat insulating structure and an outer heat insulating method for a wooden building capable of improving fire resistance and heat insulating properties.

  The outer heat insulating structure of a wooden building according to the present invention is a structural plywood attached to the outside of the structural material of the wooden building, and rock wool in which fibers are arranged in a direction substantially perpendicular to the structural plywood. A plurality of pressure-resistant heat insulating materials that are formed in a prism shape and are fixed to the outer surface of the structural plywood in a substantially horizontal direction at a predetermined interval, and substantially parallel to the structural plywood A heat insulating material for outer layer which is formed into a flat plate shape by rock wool in which fibers are arranged in a direction and is fixed to the outer surface of the structural plywood in a state where there is no gap between the heat insulating material for pressure resistance, and A body edge fixed to the structural member by a fixing screw from outside the pressure-resistant heat insulating material and the outer heat insulating material.

  Moreover, as one aspect of the present invention, it is preferable that the fixing screw is fixed obliquely downward or obliquely upward with respect to the horizontal direction.

  Furthermore, as one aspect of the present invention, the pressure-resistant heat insulating material and the outer heat insulating material may be fixed to the outer surface of the structural plywood with an adhesive.

  Moreover, as one aspect of the present invention, in order to prevent rolls between any of the pressure-resistant heat insulating materials and the heat insulating material for the outer covering and between the structural plywood and the trunk edge, It is preferable that the flat roll prevention plate is fixed in a substantially horizontal state.

  Further, according to the present invention, a wooden building outer insulation method includes a structural plywood mounting step of attaching a structural plywood to the outside of a structural material of a wooden building, and fibers are arranged in a direction substantially perpendicular to the structural plywood. A pressure-resistant heat insulating material fixing step for fixing a pressure-resistant heat insulating material formed into a prismatic shape by rock wool being fixed to the outer surface of the structural plywood at a predetermined interval in the vertical direction along a substantially horizontal direction; The outer heat insulating material formed in a flat plate shape by rock wool in which fibers are arranged in a substantially parallel direction to the structural plywood, the structure with no gap between the heat insulating material for pressure resistance A heat insulating material fixing step for fixing to the outer surface of the plywood for use, and a body edge fixing step for fixing the body edge from the outside of the heat insulating material for pressure resistance and the heat insulating material for outer covering to the structural material with fixing screws; Have

  According to the present invention, it is possible to configure the outer wall without using a base material and hold the outer wall in the long term, and to realize simplification of construction work, cost reduction, and improvement in fire resistance and heat insulation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional general view showing an embodiment of a heat insulating structure for a wooden building according to the present invention. It is a longitudinal cross-sectional enlarged view which shows the outer-layer heat insulation structure of this embodiment. It is a cross-sectional enlarged view which shows the outer-layer heat insulation structure of this embodiment. It is explanatory drawing which shows the structural plywood attachment process of this embodiment. It is explanatory drawing which shows the heat insulating material fixing process for pressure | voltage resistant of this embodiment, and the heat insulating material fixing process for external tension. It is explanatory drawing which shows the moisture-permeable and waterproof sheet coating process of this embodiment. It is explanatory drawing which shows the trunk edge fixing process of this embodiment. It is explanatory drawing which shows the exterior material attachment process of this embodiment. It is a perspective view which shows the outer-layer heat insulation structure which attached the roll prevention board of this embodiment. It is a longitudinal cross-sectional view which shows the outer-layer heat insulation structure which attached the roll prevention board of this embodiment. It is a figure which shows the experimental result of Example 1. It is a partial cross section whole view which shows one Example at the time of using a base material and a base receiving material in the external heat insulation structure of the wooden building which concerns on this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a heat insulating structure for a wooden building and a heat insulating method for a wooden building according to the present invention will be described with reference to the drawings. In the present invention, the outer heat insulation is not limited to the outer heat insulation in a narrow sense in which the outer sides of the columns and the inter-columns are covered with the heat insulating material, but the filling heat insulation in which the heat insulating material is filled between the columns and the inter-columns. It is a concept that includes additional heat insulation performed in combination with.

  As shown in FIG. 1, the outer heat insulating structure 1 of the wooden building of the present embodiment has the additional heat insulating structure described above, and mainly includes an interior material 11 and an airtight attached to the outer surface of the interior material 11. A moisture-proof sheet 12, a structural material 13 such as a pillar or a stud, an inter-axial heat insulating material 14 filled between the structural materials 13, a structural plywood 15 attached to the outside of the structural material 13, and the structural plywood A heat insulating material for pressure 16 and a heat insulating material for outer covering 17 fixed to the outer surface of 15, a moisture permeable / waterproof sheet 18 covering the heat insulating material for pressure resistance 16 and the heat insulating material for outer covering 17, and a fixing screw 19. The body edge 20 fixed to the structural material 13 by the above and the exterior material 21 are provided. Hereinafter, each configuration will be described in detail.

  The interior material 11 constitutes the interior of a wooden building, and plywood, gypsum board, or the like is used. The airtight / moisture-proof sheet 12 is for preventing moisture in the wooden building from being discharged to the outside, and is constituted by a polyethylene sheet or the like. The structural material 13 constitutes a main structure of a wooden building, such as a pillar or a stud. The inter-axis heat insulating material 14 is filled between the structural materials 13 such as columns and inter-columns, and is configured by a fiber heat insulating material such as rock wool or glass wool. The structural plywood 15 is a plywood excellent in earthquake resistance, wind resistance, airtightness, soundproofing, and the like, and is constituted by an oriented strand board (OSB) or the like. The exterior material 21 constitutes the exterior of a wooden building, and siding, tile, stone, or the like is used.

  The pressure-resistant heat insulating material 16 and the external heat insulating material 17 are heat insulating materials having excellent fire resistance, heat insulating properties, and sound insulating properties, and are made of rock wool. Specifically, the pressure-resistant heat insulating material 16 is provided in place of the conventional base material, and plays a role of supporting the pressure when constructing the trunk edge 20 in addition to the function as the heat insulating material. Moreover, the heat insulating material 17 for outer layers is filled between the heat insulating materials 16 for pressure | voltage resistance, and plays the role which improves the fire resistance and heat insulation of a wooden building.

  In the present embodiment, as shown in FIGS. 1 and 2, the pressure-resistant heat insulating material 16 is squared by rock wool having fibers arranged in a direction substantially perpendicular to the structural plywood 15 (so-called lamellar shape). It is formed in a column shape. The plurality of pressure-resistant heat insulating materials 16 are fixed to the outer surface of the structural plywood 15 at a predetermined interval in the vertical direction along the substantially horizontal direction so as to sandwich the heat insulating material 17 for the outer covering. It has become.

  On the other hand, as shown in FIG. 1 and FIG. 2, the heat insulating material 17 for outer covering is formed in a flat plate shape by rock wool in which fibers are arranged in a direction substantially parallel to the structural plywood 15. Each of the plurality of outer heat insulating materials 17 is fixed to the outer surface of the structural plywood 15 with the upper and lower ends of the heat insulating materials 17 not spaced from the pressure resistant heat insulating material 16 to heat the wooden building. It is supposed to be.

  In the present embodiment, a spray-type adhesive is used when the pressure-resistant heat insulating material 16 and the external heat insulating material 17 are temporarily fixed to the outer surface of the structural plywood 15. For this reason, nails, screws, and the like that have been conventionally required for fixing the heat insulating material are no longer necessary, the material cost is reduced, the construction becomes extremely simple, and the construction cost is also reduced. The adhesive may be any one that can be quickly and easily bonded.

  The moisture permeable / waterproof sheet 18 has a property of transmitting moisture without allowing water to pass therethrough, and is for discharging moisture in the outer wall to the outside to prevent condensation. In this embodiment, the moisture permeable / waterproof sheet 18 is composed of a sheet (nonwoven fabric) or the like in which polyethylene ultrafine fibers are randomly stacked and bonded together by heat and pressure. The outer surface of the heat insulating material 17 is covered.

  The trunk edge 20 forms a ventilation layer in the outer wall and plays a role of supporting the outer wall. As shown in FIGS. 1 to 3, the trunk edge 20 is provided in the vertical direction on the outer surface of the moisture permeable / waterproof sheet 18, and is fixed to a column or a stud with fixing screws 19. Further, in the present embodiment, as shown in FIG. 2, the fixing screw 19 is fixed in the horizontal direction, and separately fixed obliquely downward or obliquely upward with respect to the horizontal direction. For this reason, as shown in Example 1 to be described later, the supporting force of the outer wall by the fixing screw 19 is dramatically improved, and the occurrence of the wall drooping is further reduced.

  In the present embodiment, the fixing screw 19 is driven at an angle of about 45 degrees as shown in FIG. 2, but is not limited to this angle, and has an angle of 35 to 55 degrees. It is preferable. If it is 35 degrees or more, it is possible to guarantee an improvement in the supporting force of the outer wall, while if it is 55 degrees or less, it is not necessary to make the fixing screw 19 too long, and the driving operation is not made difficult.

  Moreover, in this embodiment, as shown in FIG.2 and FIG.3, the fixing screw 19 is provided at the distal end portion and is fastened to the structural plywood 15 and the inter-axial heat insulating material 14; A proximal-side threaded portion 19b that is provided at the proximal-end portion and fastened to the trunk edge 20; For this reason, the outer wall is firmly supported without being pulled out by wind pressure or vibration caused by an earthquake or a vehicle. Further, the length, thickness, strength, number, driving interval, and the like of the fixing screws 19 are determined in the structural calculation at the design stage so as to keep the total weight of the outer wall including the exterior material 21 dispersed.

  Next, the operation of the outer heat insulating structure 1 and the outer heat insulating method of the wooden building of the present embodiment will be described with reference to the drawings.

  When the outer heat insulating structure 1 is constructed by the outer heat insulating method of the present embodiment, first, an airtight / moisture proof sheet 12 is attached to the interior material 11 as shown in FIG. As a result, the airtight / moisture-proof sheet 12 prevents moisture in the wooden building from being discharged into the outer wall and suppresses condensation, thereby preventing the structural material 13 from decaying. Thereafter, the inter-axial heat insulating material 14 is filled between the structural materials 13 such as columns and inter-columns. Thereby, since the heat insulation material 14 between shafts fills the space | gap between the structural materials 13, and insulates, the heat insulation of a wooden building is improved. Subsequently, the structural plywood 15 is attached to the outside of the structural material 13 (structural plywood attaching step).

  Next, as shown in FIG. 5, the pressure-resistant heat insulating material 16 is fixed along the substantially horizontal direction to the outer surface of the structural plywood 15 at the lowest part that requires heat insulation (fixing the pressure-resistant heat insulating material). Process). At this time, in the present embodiment, the pressure-resistant heat insulating material 16 is simply and firmly temporarily fixed by the spray adhesive without using a nail or a screw, so that the material cost and the construction cost are reduced. In addition, since it will take time until it will be fixed when an adhesive is used, the pressure-resistant heat insulating material 16 to be fixed to the lowermost part of the building may be immediately fixed with a screw using a washer.

  After temporarily fixing the pressure-resistant heat insulating material 16 at the bottom, the outer heat-insulating material 17 is placed on the upper end of the pressure-resistant heat insulating material 16 and fixed to the outer surface of the structural plywood 15 (outside Insulating material fixing process for tension). At this time, when the outer heat insulating material 17 stacked on the pressure-resistant heat insulating material 16 is pressed downward, both are formed of rock wool, so that the fibers become familiar with each other and there is no gap between them. For this reason, a heat bridge is unlikely to occur between the pressure resistant heat insulating material 16 and the outer heat insulating material 17, and the occurrence of condensation is suppressed and the heat insulating property is improved. Further, in the present embodiment, the heat insulating material 17 for the outer covering is simply and firmly temporarily fixed by a spray adhesive without using a nail, a screw or the like, like the heat insulating material 16 for pressure resistance. And construction costs are reduced.

  The pressure-resistant heat insulating material fixing step and the outer-stretching heat insulating material fixing step are alternately repeated from the bottom to the top, and the pressure-resistant heat insulating material 16 and the outer heat-insulating material 17 are alternately laminated. As a result, as shown in FIG. 1, a plurality of pressure-resistant heat insulating materials 16 are fixed to the outer surface of the structural plywood 15 at predetermined intervals along the substantially horizontal direction, and each pressure-resistant heat insulating material is fixed. Between the materials 16, the outer insulation 17 is fixed without a gap. For this reason, the entire outer surface of the structural plywood 15 is covered with rock wool, which improves the fire resistance, heat insulation and sound insulation of the wooden building.

  After temporarily fixing and fixing the pressure-resistant heat insulating material 16 and the outer heat-insulating material 17, as shown in FIG. 6, an adhesive is applied to the outer surfaces of the pressure-resistant heat insulating material 16 and the outer heat-insulating material 17 so as to allow moisture permeation. Cover the waterproof sheet 18 (moisture permeable / waterproof sheet coating step). As a result, the moisture permeable / waterproof sheet 18 allows moisture to pass through without allowing water to pass therethrough, so that moisture inside the outer wall is discharged outdoors to prevent condensation.

  Next, as shown in FIG. 7, the trunk edge 20 is installed on the outer surface of the moisture permeable / waterproof sheet 18 so as to correspond to the position of each structural member 13, and is fixed to the structural member 13 with fixing screws 19. (Trunk fixing process). At this time, since the pressure-resistant heat insulating material 16 has a high pressure resistance in a substantially vertical direction with respect to the structural plywood 15, the pressure at the time of constructing the trunk edge 20 is supported. For this reason, since an outer wall is comprised without using the base material like the past, even if the total weight of an outer wall increases, it is hard to raise | generate a wall dripping. And since the fixing screw 19 firmly connects the trunk edge 20 and the structural member 13 to support the outer wall, further dripping of the wall is prevented.

  In this embodiment, as shown in FIGS. 2 and 7, the fixing screw 19 driven in the horizontal direction and the fixing screw 19 driven obliquely are caused by wind pressure, earthquake, vehicle traffic, or the like. The trunk edge 20 is supported while receiving the impact of longitudinal vibration. For this reason, even if a heavy material such as a tile or stone plate is used as the exterior material 21 of the wooden building, the possibility of dripping is extremely low, and the range of design choices in the wooden building is greatly expanded. It is done.

  After constructing the trunk edge 20, as shown in FIG. 8, the exterior heat insulating structure 1 of the wooden building of the present embodiment is constructed by fixing the exterior material 21 to the trunk edge 20. At this time, as the exterior material 21, any of the laterally stretched exterior material 21 and the longitudinally stretched exterior material 21 can be used.

  In the above-described embodiment, since the outer wall having a thickness of the pressure-resistant heat insulating material 16 and the outer heat insulating material 17 is assumed to be about 125 mm, mainly measures against longitudinal vibration due to an earthquake or the like are taken. . However, when the thickness of the pressure-resistant heat insulating material 16 and the external heat insulating material 17 is 150 mm or more, it is preferable to separately take measures against rolling due to an earthquake or the like.

  Specifically, as shown in FIG. 9 and FIG. 10, between any of the pressure resistant heat insulating materials 16 and the outer heat insulating material 17 and between the structural plywood 15 and the trunk edge 20, A flat roll prevention plate 22 for preventing shaking is fixed in a substantially horizontal state. By constructing the roll prevention plate 22 along the periphery of the wooden building, each roll prevention plate 22 prevents the outer wall from rolling and suppresses the occurrence of wall drooping. For example, in the case of a one-storey wooden building, there are about three places where the roll prevention plate 22 is installed, and in the case of a two-storey wooden building, there are about five places.

  Further, as a method for attaching the roll prevention plate 22, as shown in FIGS. 9 and 10, a step is formed at the inner upper end portion for each predetermined number of the plurality of pressure-resistant heat insulating materials 16, and the step A prismatic support member 23 is attached to the outer surface of the structural plywood 15 so as to fit into the plywood. Then, the inner end portion of the roll prevention plate 22 is fixed to the support member 23, and the outer end portion of the roll prevention plate 22 is fixed to the trunk edge 20. At this time, as shown in FIGS. 9 and 10, the rolling prevention plate 22 is firmly supported by driving the fixing screw 19 in an oblique direction so as to penetrate the rolling prevention plate 22.

According to the outer heat insulating structure 1 and the outer heat insulating method for a wooden building according to the present invention as described above, the following effects can be obtained.
1. It is possible to provide a durable and reliable wooden building that can prevent the drooping and retain the outer wall for a long time.
2. The outer wall can be configured without using a base material, the construction work can be simplified, and the construction cost can be reduced.
3. A base material, a dedicated bracket, or the like is not necessary, and the material cost can be reduced.
4). Rock wool with excellent fire resistance and heat insulation can improve the fire resistance of wooden buildings, and can suppress the occurrence of heat bridges and improve heat insulation and sound insulation.
5. By driving the fixing screw 19 diagonally, the load resistance of the trunk edge 20 can be greatly improved, and the occurrence of drooling can be further suppressed.
6). The pressure-resistant heat insulating material 16 and the external heat insulating material 17 can be temporarily fixed with an adhesive, so that the construction work can be simplified and the construction cost can be reduced.
7). Even when the pressure-resistant heat insulating material 16 and the external heat insulating material 17 are thick, the roll can be prevented and the occurrence of wall drooping can be suppressed.

  Next, specific examples of the outer heat insulating structure 1 and the outer heat insulating method for a wooden building according to the present invention will be described.

  In Example 1, an experiment was performed to measure the strength when the fixing screw 19 was fixed in an oblique direction between the structural member 13 and the trunk edge 20. Specifically, in a state where a space of a predetermined thickness is provided between the structural member 13 and the trunk edge 20, the horizontal direction, 45 degrees obliquely downward, and 45 degrees obliquely upward (some not implemented) are fixed at each angle. After driving the machine screw 19, an upward or downward load was applied to the trunk edge 20, and the bending strength was measured when displaced by 1 mm from the initial position. The result is shown in FIG.

In this experiment, the thickness of the space was set to four patterns of 75 mm, 100 mm, 125 mm, and 150 mm. In addition, the bending strength value was averaged by performing the same experiment several times for each condition. Further, as the fixing screw 19, a screw (Panelead II ⁺ : manufactured by East Japan Power Fastening Co., Ltd.) used for the outer insulation method was used.

  As a result of this experiment, as shown in FIG. 11, the bending strength of the fixing screw 19 driven obliquely downward was improved to about 15 to 30 times that of the fixing screw 19 driven in the horizontal direction. Further, the bending strength of the fixing screw 19 driven obliquely upward was improved to about 33 to 36 times that of the fixing screw 19 driven in the horizontal direction.

  According to the first embodiment as described above, it was shown that the load resistance of the trunk edge 20 is remarkably improved by fixing the fixing screw 19 obliquely downward or obliquely upward with respect to the horizontal direction. For this reason, it has been shown that when the fixing screw 19 is driven obliquely, the supporting force of the outer wall is dramatically improved, and the occurrence of drooling is further reduced.

  In addition, the outer heat insulation structure 1 and the outer heat insulation construction method of the wooden building which concern on this invention are not limited to embodiment mentioned above, It can change suitably.

  For example, the above-described wooden building of the present embodiment has an additional heat insulating structure in which filling heat insulation is combined with outer heat insulation, but is not limited to this configuration, and an outer heat insulating structure in which filling heat insulation is not performed. It may be 1.

  In the above-described embodiment, the pressure-resistant heat insulating material 16 and the external heat insulating material 17 are bonded to the outer surface of the structural plywood 15 using an adhesive, but temporarily fixed with a nail, a screw, or the like. Also good.

  Furthermore, in the present embodiment described above, the outer heat insulating structure 1 is constructed without using the base material 24 and the base support material 25, but the technical scope of the present invention is to provide the base material 24 and the base support material 25. It includes the outer heat insulating structure 1 used. That is, as shown in FIG. 12, a small number of base materials 24 may be attached to the lower end portion, the upper end portion or the like in the horizontal direction, and the base receiving material 25 may be attached to the protruding corner portion.

  INDUSTRIAL APPLICABILITY The present invention can be used as an outer heat insulating structure 1 and an outer heat insulating method when a wooden building is newly constructed or renovated.

DESCRIPTION OF SYMBOLS 1 Outer heat insulation structure 11 Interior material 12 Airtight and moisture-proof sheet 13 Structural material 14 Interaxial heat insulating material 15 Structural plywood 16 Insulation material for pressure resistant 17 Thermal insulation material for outer layer 18 Moisture permeable / waterproof sheet 19 Fixing screw 19a Tip side screw Part 19b base end side screw part 20 trunk edge 21 exterior material 22 roll prevention plate 23 support material 24 base material 25 base receiving material

Claims (5)

Structural plywood attached to the outside of the structural material of the wooden building;
It is formed in the shape of a prism by rock wool in which fibers are arranged in a substantially vertical direction with respect to the structural plywood, and is fixed to the outer surface of the structural plywood at a predetermined interval in the vertical direction along a substantially horizontal direction. A plurality of pressure-resistant insulation materials,
It is formed into a flat plate shape by rock wool in which fibers are arranged in a direction substantially parallel to the structural plywood, and is fixed to the outer surface of the structural plywood with no gap between the pressure resistant heat insulating material. Thermal insulation for the outside,
An outer heat insulating structure for a wooden building, comprising: a pressure resistant heat insulating material and a body edge fixed to the structural material by a fixing screw from outside the heat insulating material for outer covering.   The outer heat insulating structure for a wooden building according to claim 1, wherein the fixing screw is fixed obliquely downward or obliquely upward with respect to a horizontal direction.   3. The external heat insulating structure for a wooden building according to claim 1, wherein the heat insulating material for pressure resistance and the heat insulating material for outer covering are fixed to an outer surface of the structural plywood by an adhesive.   There is a plate-like roll prevention plate for preventing rolls between any of the pressure-resistant heat insulators and the outer heat insulator, and between the structural plywood and the trunk edge. The external heat insulating structure for a wooden building according to any one of claims 1 to 3, which is fixed in a substantially horizontal state. A structural plywood attachment process for attaching a structural plywood to the outside of the structural material of the wooden building;
A pressure-resistant heat insulating material formed in the shape of a prism by rock wool in which fibers are arranged in a substantially vertical direction with respect to the structural plywood is predetermined in the vertical direction on the outer surface of the structural plywood. A pressure-resistant heat insulating material fixing step for fixing with an interval of,
The outer heat insulating material formed in a flat plate shape by rock wool in which fibers are arranged in a substantially parallel direction to the structural plywood, the structure with no gap between the heat insulating material for pressure resistance A heat insulating material fixing step for fixing to the outer surface of the plywood,
An outside thermal insulation method for a wooden building, comprising: a trunk edge fixing step of fixing a trunk edge to the structural member with a fixing screw from outside the pressure-resistant heat insulating material and the external thermal insulation material.