JPH09279778A - Horizontal-roofing exterior structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontal-roofing exterior structure which, although lightweight, has a backing-up ability equivalent to those of conventional weighty members with high density and bending strength, and which is high in heat insulating property and in the ability to prevent bedewing of the inside of the back of an exterior material. SOLUTION: This horizontal-roofing exterior structure for a building comprises sheathing 2 laid over a skeleton 1 or a base member that matches the skeleton 1 in strength, with a horizontal-roofing exterior material 6 laid over the sheathing with rafters 3 and a backup material 5 between them. The rafters 3 are secured to the skeleton 1 or the base member in such a way as to be arranged at predetermined intervals along the ridge direction and to continue with one another along the eaves-ridge direction, and the backup material 5 is made from low-density resin foam having a plurality of stepped parts on its front that bear the back of the horizontal-roofing exterior material 6 to match the effective width of the exterior material 6, and having on its back a plurality of tunnel-shaped parts 5f that continue with one another along the eaves-ridge direction, and is laid between the adjacent rafters 3 held in place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to weight reduction of a lateral roofing structure having an air layer in a building.

[0002]

2. Description of the Related Art Lateral roofing materials have come into widespread use in recent years as roofs with particularly high designability. However, because of the construction in which the ridge-side engaging portions and the eave-side engaging portions are engaged and laid, When laid in, a space with a substantially triangular cross section is created between the face plate of the exterior material and the base material, and plastic deformation occurs when a snow load or an artificial concentrated load is applied, resulting in deterioration of the design and the worst case. In this case, there is a possibility that the rain function will deteriorate. On the other hand, due to the social demand for the prevention of internal dew condensation on the roof structure and the external heat insulation of buildings,
The number of cases where an air layer is provided in the roof structure is increasing.

For this reason, as an exterior structure which does not cause deformation and in which an air layer is provided, a lower plate as a backup is attached along with the back surface of the lateral roofing material, as shown in Japanese Patent Publication No. 59-3.
There is a structure as shown in No. 8382. Since the lower plate in this roof structure uses a member made of a material having a relatively high density and high bending strength, such as a wood wool (cement) plate,
On the other hand, although the requirements are satisfied, there is a problem that the structure weight per unit area is large although the weight of the lateral thatching material itself is small. Since the earthquake in Kobe, there has been an increasing demand for reduction of this structural weight in relation to the seismic force. On the other hand, in the roof structure shown in Japanese Utility Model Publication No. 3-6731, a backup material having a substantially triangular cross section on the surface of a base material such as a wood wool (cement) plate is formed of a foam material to avoid deformation and reduce weight. Measures have been made, and to secure an air layer, the left and right side edges of the base material are supported by rafters,
An air layer is formed with the base material floating above the surface of the main material or the inner base material. By the way, since the base material has a structure in which the right and left side edges are supported by rafters, a required strength is required for the load, and the weight of the base material itself cannot be expected.

[0004]

The first problem to be solved is, in spite of having a lightweight structure, having a backup capacity equivalent to that of a conventional member having a high density, a high bending strength and a large weight. The purpose is to obtain a building thatched roof exterior structure with high heat insulation and a high ability to prevent internal dew condensation on the backside of the exterior material. Secondly, the construction is performed quickly from top to bottom without damaging the exterior material. It is possible to obtain a building thatched roof structure.

[0005]

In order to solve the above-mentioned problems, the present invention lays a field material on a building frame or a base member having strength equivalent to this, and installs rafters and a backup material on the field material. In the lateral roofing structure of the building that roofs the lateral roofing material through, the rafter is fixed to the building frame or base member so as to be continuous in the eaves direction at a predetermined interval in the girder direction, The backup member has a plurality of stepped portions on the front surface side that support the back surface of the exterior material in correspondence with the effective width of the horizontal roofing material, and a plurality of tunnels continuous in the eaves direction on the back surface side. It is characterized in that it is made of a low-density foamed resin material having a shaped portion, and that the backup member is laid between the fixed adjacent rafters. Further, in the present invention, a field material is laid on a building frame or a base member having strength equivalent to this, and a rafter and a backup material are provided on the field material. In a horizontal thatch exterior structure of a building that uses an exterior material holding member having a holding portion that can be retained in an inserted state, the rafters are provided with a predetermined interval in the direction of the girder. Fixed to the building frame or base member so as to be continuous in the ridge direction,
The back-up member receives on the front surface side the back surface of the exterior material corresponding to the effective width of the horizontal-roof exterior material, and does not hinder the insertion of the ridge-side processed portion of the horizontal-roof exterior material in a part thereof. It has a plurality of stair-shaped portions forming concave portions, and is made of a low-density foamed resin material having a plurality of tunnel-shaped portions continuous in the eaves direction on the back side, and between the fixed adjacent rafters. The backup member is laid.

The building exterior material in the present invention is a known metal material such as surface decorative steel plate, laminated steel plate, plated steel plate, stainless steel plate, aluminum alloy plate, titanium alloy plate, copper plate, brass plate, lead plate, and carbon fiber laminated plate. , A hard resin plate or the like. When the material is a metal plate, it is formed by roll forming, press forming, or a combination of both. When the material is a non-metallic material, it is mainly formed by molding. The material thickness is not particularly limited, but is approximately 0.4 to 1.6 mm. In addition, the building exterior material may be a composite plate in which the above materials are combined or a solar cell is attached to a substantially flat portion. As a building exterior material, a thatched roof panel or an outer wall, that is, a horizontal siding, etc. is targeted. Normally, the lateral roofing exterior material is factory-manufactured as a long fixed length material having a length of about 3 to 5 m, and the connection in the longitudinal direction (generally the girder direction) can be made by a conventionally known connecting means using a joint member or the like. Done. However, when a molding machine is brought into a construction site to perform on-site molding, one long material having a required length may be used. The rafter is wood, a metal material, a combination of a metal material and a heat insulating material, and the like, and the rafter allocation interval is approximately 330 to 550 mm.

The exterior material holding member is made of a press-formed product such as a plated steel plate or a stainless steel plate, a roll-formed product, an extruded product made of aluminum or a hard resin, or a ceramic.
This exterior material holding member may be a piece material or a long material, but in the case of a long material, it is efficient to use a roll or extrusion. The material thickness is not particularly limited, but is approximately 0.4 to 1.6 mm in the case of press and roll molded products, and is approximately 1.2 in the case of extrusion molded products.
To about 2.5 mm. The low-density backup material is a known foamed resin material such as polyurethane, polystyrene, and phenol, and specifically, has a bulk specific gravity of 0.2.
It will be about 5 to 0.1. Since this type of backup material has excellent heat insulating properties, high heat insulating properties can be expected as the exterior structure in the case where the rafter is made of wood, or in the case of a structure in which a downward facing substantially U-shaped metal is filled with the heat insulating material. Also,
When the rafter is formed of a metal material having a substantially Z-shaped or U-shaped cross section, the same effect can be expected by inserting one side of the backup material surface into the recess of the rafter as an insertion portion. Further, when the rafter is formed of a substantially inverted H-shaped metal material, the same effect can be expected by using both sides of the backup material surface as insertion portions and forming a slit in the center. Since the backup material is made of a foamed resin material, even if internal dew condensation occurs due to its high heat insulating property, the heat insulating property is not deteriorated unlike the fibrous heat insulating material.

[0008] The building frame and a base member having a strength equivalent to the building frame are all building frames to which fasteners such as nails, screws, and anchors can be attached in a building structure such as a wooden structure, a steel frame structure, or a concrete structure. And a base member. However, in the case where the field material laid on the frame is a wood chip cement board or a board such as an ALC plate for which a fastener is effective, in reality, the building frame and the base member and the field material having a strength equivalent to this are Can be identified. Therefore, normally, the rafter penetrates the field material and is fixed to the base member having a strength equivalent to that of the building frame and the exterior material is fixed to the rafter, but the field material corresponds to the base member. Exceptionally, the rafter and the exterior material may be fixed to the field material if they have a fixed strength.

[0009]

1 to 4 show a horizontal roof structure as an embodiment of a horizontal roof structure for a building according to the present invention. A field material 2 laid on a frame 1 is shown. The rafters 3 are arranged and fixed on the upper part by fasteners 4 at predetermined intervals in the direction of the girder so as to be continuous in the direction of the eaves. The portion 5a and the eaves side end portion 5b are laid so as to be connected to each other. Then, a horizontal roofing roof plate 6 is laid on the rafters 3 and the backup material 5, and the horizontal roofing roof boards 6 at each stage are engaged with the ridge side engaging portion 6a and the eaves side engaging portion 6b, respectively. In this engaged and connected state, the roof board holding member 7 attached and fixed to the rafter 3 by the fixing tool 8 is fixed and roofed.

The rafter 3 is made of wood and is fixed to the body 1 side by a fastener 4 penetrating the field material 2, and its upper surface 3a is located at a position lower than the lower end of the vertical surface portion 5d of the stepped portion 5c of the backup material 5. In this connection, the horizontal roofing plate 6 can be brought into close contact with the stepped portion 5c without being obstructed by the upper surface 3a.

The backup material 5 is made of a low-density foamed resin material and is long in the eaves ridge direction. The back surface of the backing board 6c is supported by the effective width of the horizontal roofing board 6 on the front side. It has a plurality of (4 steps in the drawing) stepped parts 5c, and the ridge-side end 5a is connected in an insidious manner to the connection recess 5e at the lower edge of the eaves-side end 5b. The stepped portions 5c of the respective backup materials 5 continuously receive the face plate portions 6c of the horizontal roofing boards 6 at the respective stages in the effective width of the horizontal roofing boards 6 in the eaves ridge direction. In addition, the backup material 5 has a plurality of trapezoidal tunnel-shaped portions 5f (four in the drawing) having a trapezoidal cross section that are continuous from the eaves-side end to the ridge-side end on the back side. Communicate with the tunnel-shaped portions 5f of the backup materials 5 in the eaves direction, respectively, and each backup material 5 in the eaves direction forms a continuous space S extending from the ridge side to the eaves side. The legs 5g between the tunnel-shaped portions 5f are respectively placed on the surface of the field material 2 to secure the continuous space S, and various loads on the lateral thatched roof plate 6 are distributed to the legs 5g. To work. The ratio relationship between the tunnel-shaped portion 5f and the leg portion 5g is set in a range in which the effects of both the backup and the heat insulating space and the space serving as the internal dew condensation preventing space are satisfied.

The horizontal roofing board 6 is made of metal, and has a ridge-side engaging portion 6a formed by folding back on the ridge-side surface, and an eave-side engaging portion 6b formed by folding back on the eaves-side rear surface. It is composed of a face plate portion 6c between the engaging portions 6a and 6b, and the ridge-side engaging portion 6a of the eave-side lateral thatch roof plate 6 and the eave-side engaging portion 6b of the ridge-side lateral roof roof plate 6 are engaged in each stage. The roof plate holding member 7 is held in this engaged state and is fixed to the rafter 3. The roof plate holding member 7 is a metal piece member, and includes a fixed portion 7a and a holding portion 7b extending from the fixed portion 7a to the eaves side end and capable of holding the ridge side engaging portion 6a. The fixing portion 7a is attached and fixed to the upper surface 3a of the rafter 3 by the fixing tool 8, and the ridge-side engaging portion 6a is held by the holding portion 7b.

As a result, each leg 5g is mounted on the surface of the base material 2 even though it is the low-density backup material 5,
The entire face plate portion 6c of the horizontal roofing board 6 can be supported by the stepped portion 5c for backing up, and the stepped portion 5c and the back-to-back tunnel-shaped portion 5f are present in the structure, and their existence is a field. Since each leg 5g mounted on the surface of the material 2 is secured, there is a manufacturing advantage that the tunnel-shaped part 5f is integrally molded, and the structural weight of the backup material 5 itself is significantly reduced. can do. Since the continuous space S consisting of the tunnel-shaped portion 5f of each backup material 5 communicates between the ridge side and the eaves side, high efficiency can be obtained as a heat insulating space and an internal dew condensation preventing space.

FIG. 5 to FIG. 8 exemplify another side-roof structure as one embodiment of the side-roof exterior structure of a building according to the present invention. The structure is basically the same as that of the embodiment shown in FIG. Since they are the same, the description of the common configuration will be omitted, and the different configuration will be described. The rafter 3 is made of metal and has a substantially gate-shaped cross section, and is fixed to the body 1 side by a connecting tool 10 via a metal connecting member 9. The backup material 5 has a recessed portion 5h formed along the lower edges of the left and right side edges, and the left and right portions of the connecting member 9 are accommodated in the recessed portion 5h so that the legs 2 are attached to the surface of the field material 2 between the rafters 3. It is laid in the state that the part 5g is mounted. Further, the backup material 5 has concave portions 5i formed on the surface portion of the stepped portion 5c adjacent to the lower edge of each vertical surface portion 5d and on the surface portion connected to the eaves side end portion 5b of the upper backup material 5, respectively. The size of the concave portion 5i is such that, when the eaves side engaging portion 6b of the upper side roofing roof plate 6 is engaged with the ridge side engaging portion 6a of the lower side side roofing roof plate 6, The roof plate 6 is laid down from the standing state so that the movement of inserting the ridge-side engaging portion 6a into the upper side between the eaves-side engaging portion 6b and the holding portion 7b is not hindered. Also, backup material 5
The tunnel-shaped portion 5f is formed in a semicircular cross section.

As a result, the same effect as that of the embodiment of FIG. 1 can be obtained, and further, the lower side roofing roof plate 6 is inverted with respect to the upper side roofing roof plate 6, and the lower side building roof side is inverted. Engagement part 6a
Can be engaged with the eaves side engaging portion 6b on the upper stage side, and the side thatched roof plate 6 is roofed from the upper stage side to the lower stage side.

FIG. 9 illustrates another lateral roof structure as an embodiment of the lateral roof structure for a building according to the present invention.
Since the configuration is basically the same as that of the aspect of FIG. 1 described above, the description of the common configuration will be omitted and a different configuration will be described. The rafter 3 is composed of a heat insulating resin material 3b having a rectangular cross section, a metal lower member 3c, and an upper member 3h. The lower member 3c has a bottom portion 3d along the lower surface of the heat insulating resin material 3b and a collar portion 3e on the left and right. It extends horizontally and the left and right collars 3e
And the heat-insulating resin material 3b is attached to the left and right sides of the heat-insulating resin material 3b.
It meshes inside and is integrated. Upper member 3h is a heat insulating resin material
Upper part 3i along the upper surface of 3b, and hanging parts 3j are hung vertically, and the lower ends of the left and right hanging parts 3j along the left and right side surfaces of the heat insulating resin material 3b are bent back inwardly and diagonally. The portion 3k is formed, and the left and right claw portions 3k are meshed with and integrated with the heat insulating resin material 3b. Then, the rafter 3 is fixed to the body 1 side by the fasteners 4 with the bottom portion 3d and the collar portion 3e stably installed on the surface of the base material 2, and the roof member is attached to the upper member 3h, that is, the upper surface 3a. The holding member 7 is attached and fixed by a fixture 8. The backup material 5 has a recessed portion 5h formed along the lower edges of the left and right side edges, and the collar portion of the rafter 3 is formed in the recessed portion 5h.
The legs 5g are laid on the surface of the field material 2 between the rafters 3 so that 3e can be accommodated therein.

As a result, the backup material 5 has the same effect as that of the embodiment shown in FIG. 1 and further has a high heat insulating property.
Insulation resin material 3b in which the rafter 3 itself in the space considers heat insulation
Since it has a combined structure with, it eliminates the thermal bridge and is excellent in heat insulation as a whole. Also, backup material 5
Has a concave portion 5f, the same effect as that of the embodiment of FIG. 5 can be obtained.

FIG. 10 illustrates another lateral thatch roof structure as one embodiment of the lateral thatched roof structure of the present invention.
Since the configuration is basically the same as that of the aspect of FIG. 9 described above, description of the common configuration will be omitted, and different configuration will be described. The rafter 3 is composed of a heat insulating resin material 3m and a metal jacket 3n. The jacket 3n bends the left and right lower ends of the cross-sectional gate shape inward to form the left and right rims 3p, and the left and right rims It has a collar portion 3q that is folded back outward from 3p and extends horizontally, and the outer covering portion 3n is filled with foamed resin to form a heat insulating resin material 3m. This rafter 3 has a collar 3q
Is fixed to the body 1 side with a fixing tool 4 in a state of being stably installed on the surface of the base material 2. Thereby, the same effect as that of the embodiment of FIG. 1 is obtained, and when the backup material 5 has the concave portion 5f, the same effect as that of the embodiment of FIG. 5 is obtained.

FIG. 11 and FIG. 12 show another lateral roof structure as an embodiment of the lateral roof structure for a building according to the present invention. The structure is basically the same as that of the embodiment shown in FIG. Since they are the same, the description of the common configuration is omitted,
The different configuration will be described. The rafter 3 has a U-shaped cross section formed by roll-molding a metal plate, the fixing portion 3r is fixed to the body 1 side by a fixing tool 4, and the roof plate holding member 7 is fixed to the upper surface 3a by a fixing tool 8. . Then, in the fitting recess 3t surrounded by the upper surface 3a, the fixing portion 3r, and the standing portion 3s of the rafter 3, there is provided the insertion portion 5j on the left side edge of the backup material 5 which is formed so as to be fittable in the fitting recess 3t. Inserted in a mating form. The backup material 5 has a recessed portion 5h formed along the lower edges of the left and right side edges, and the fixing portions 3r of the rafters 3 are housed in the recessed portion 5h so that the surface of the field material 2 between the rafters 3 is covered. It is laid with the legs 5g on it. Thereby, the same effect as that of FIG. 1 is obtained, and when the backup material 5 has the concave portion 5f (shown by an imaginary line), the same effect as that of the embodiment of FIG. 5 is obtained. .

FIG. 13 illustrates another lateral roof structure as an embodiment of the lateral roof structure of a building according to the present invention.
Since the configuration is basically the same as that of the embodiment shown in FIG. 11, the description of the common configuration will be omitted and a different configuration will be described. The rafter 3 is formed by roll-forming a metal plate and has a roughly U-shaped cross section.
It is fixed to the side. Then, in the fitting recess 3t surrounded by the upper surface 3a, the fixing portion 3r, and the standing portion 3s of the rafter 3, there is provided the insertion portion 5j on the left side edge of the backup material 5 which is formed so as to be fittable in the fitting recess 3t. Inserted in a mating form. This allows
It has the same effect as that of FIG.

FIG. 14 illustrates another lateral roof structure as an embodiment of the lateral roof structure of a building according to the present invention.
Since the configuration is basically the same as that of the embodiment shown in FIG. 11, the description of the common configuration will be omitted and a different configuration will be described. The rafter 3 is formed by roll-molding a metal plate and has a substantially E-shaped cross section.
It is fixed to the side. Then, in the right and left fitting recesses 3t surrounded by the upper surface 3a of the rafter 3, the fixing portion 3r, and the standing portion 3s,
The insert portions 5j on the left and right side edges of the backup material 5 which are respectively formed so as to be able to be fitted in the fitting concave portions 3t are inserted in a fitting manner. This has the same effect as that of FIG.

[0022]

【The invention's effect】

A. According to claim 1, although it is a low-density backup material, a backup effect similar to that of a conventional high-density rectangular cross-section board exterior material, and a space formed by a tunnel-like portion are formed in the backup material itself, that is, the structure. In addition to the manufacturing effect, the structural weight can be significantly reduced. The space can act as a heat insulating space and an internal dew condensation preventing space, and a lateral roof structure for a building having a high heat insulating property and a high ability to prevent internal dew condensation on the back surface of the exterior material can be obtained.

B. According to claim 2, although it is a low-density backup material, it has a backup effect similar to that of a conventional high-density rectangular cross-section board exterior material, and an effect of forming a space having a tunnel-like portion in the backup material itself, that is, in the structure. In addition, the structural weight can be significantly reduced. The space can act as a heat insulating space and an internal dew condensation preventing space, and a lateral roof structure for a building having a high heat insulating property and a high ability to prevent internal dew condensation on the back surface of the exterior material can be obtained. In addition, in the stepped portion, a concave portion is formed in a part of the surface that receives the back surface of the lateral thatch exterior material so as not to prevent the ridge-side processed portion of the exterior material from being inserted. The side processed portion can be inserted into the exterior material holding member through the concave portion and held by the holding portion in the same insertion state, and the lateral thatched exterior material can be roofed from top to bottom. As a result, if the exterior material is a roof, the possibility of scratching or soiling the completed surface in subsequent work is greatly reduced, and if it is a wall, the scaffolding can be disassembled earlier. can get.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view illustrating a lateral thatched roof structure as an embodiment of a lateral thatched roof structure of a building according to the present invention.

FIG. 2 is a vertical sectional front view of (2)-(2) of FIG.

FIG. 3 is an enlarged vertical side view of (3)-(3) in FIG.

FIG. 4 is a reduced perspective view of a backup material.

FIG. 5 is a vertical cross-sectional side view illustrating another lateral roof structure as an embodiment of the lateral roof structure for a building according to the present invention.

6 is a vertical sectional front view of (6)-(6) of FIG.

FIG. 7 is an enlarged vertical side view of (7)-(7) in FIG. 6.

FIG. 8 is a reduced perspective view of a backup material.

FIG. 9 is a vertical cross-sectional front view illustrating another lateral thatched roof structure as one embodiment of the lateral thatched roof structure of the present invention.

FIG. 10 is a partially enlarged vertical front view illustrating another lateral thatch roof structure as an embodiment of the lateral roof structure for a building of the present invention.

FIG. 11 is a vertical cross-sectional front view illustrating another lateral thatch roof structure as an embodiment of the lateral thatched roof structure of the present invention.

FIG. 12 is a reduced perspective view of a backup material.

FIG. 13 is a partially enlarged vertical front view illustrating another lateral roof structure as an embodiment of the lateral roof structure for a building according to the present invention.

FIG. 14 is a partially enlarged vertical sectional front view illustrating another lateral thatch roof structure as one embodiment of the lateral roof structure for a building of the present invention.

[Explanation of symbols]

1 frame 2 field material 3 rafter 3a rafter top 3b, 3m rafter insulation resin material 3c rafter lower member 3d lower member bottom 3e lower member collar 3f lower member rising part 3g lower member claw 3h rafter Upper member 3i Upper part of upper member 3j Folded part of upper member 3k Claw part of upper member 3n Rafter covering 3p Rafter edge 3q Rafter collar 3r Rafter fixing 3s Rafter standing 3t Rafter Fitting recess 4 Fastener 5 Backup material 5a End of ridge side of backup material 5b End of eaves side of backup material 5c Stepped portion of backup material 5d Vertical surface portion of stepped portion 5e Connection recess of backup material 5f Tunnel of backup material Section 5g Backup material leg 5h Backup material recess 5i Backup material recess 5j Backup material insertion section S Continuous space 6 Lateral roofing board (sideboard exterior material) 6a Lateral roofing board ridge Joint part (building side processing part) 6b Parts 6c horizontal 葺 shingle face plate 7 roof plate holding member (exterior member holding member) holding portion of the fixing portion 7b roof plate holding member 7a roof plate holding member 8 fixture 9 connecting member 10 coupling

Claims (2)

[Claims] 1. A lateral roofing exterior of a building in which a field material is laid on a building frame or a base member having a strength equivalent to that of the building frame, and a roofing exterior material is roofed on the field material through a rafter and a backup material. In the structure, the rafter is fixed to the building frame or the base member so as to be continuous in the eaves direction with a predetermined interval in the girder direction, and the backup member is effective on the surface side of the horizontal roofing material. It has a plurality of stepped portions that support the back surface of the exterior material in correspondence with the width, and is made of a low-density foamed resin material having a plurality of tunnel-shaped portions continuous in the eaves direction on the back surface side, and A lateral thatching structure for a building, characterized in that the backup member is laid between adjacent fixed rafters. 2. A field material is laid on a building frame or a base member having a strength equivalent to that of the building frame, a rafter and a backup material are provided on the field material, and the ridge-side processing portion of the lateral thatch exterior material is the same. In a horizontal thatch exterior structure of a building that uses an exterior material holding member having a holding portion that can be retained in an inserted state, the rafters are provided with a predetermined interval in the direction of the girder. It is fixed to the building frame or the base member so as to be continuous in the ridge direction, the backup member supports the back surface of the exterior material corresponding to the effective width of the horizontal roofing exterior material on the front surface side, and part thereof It has a plurality of stair-like portions forming a concave portion that does not hinder the insertion of the ridge-side processed portion of the lateral roofing material, and has a low density having a plurality of tunnel-like portions continuous in the eaves direction on the back surface side. It is made of a foamed resin material, and the bag is placed between the fixed adjacent rafters. A lateral thatch structure for buildings, which is characterized by laying up a cuff member.