JP4669342B2 - Thermal insulation waterproof structure - Google Patents

Description

  The present invention relates to a heat insulating waterproof structure for a building.

  In order to improve the living environment and prevent global warming, it is necessary to improve the heat insulation of buildings, including external insulation. In addition, waterproofing of buildings is an important factor that greatly affects the lifetime of buildings.

  One of the technologies related to thermal insulation and waterproofing of buildings is the thermal insulation and waterproof structure of verandas, balconies and roofs. In this heat insulating waterproof structure, for example, there is a structure in which a heat insulating layer, a waterproof layer, and a surface layer are provided on the lower ground such as concrete, ALC board, and plywood. In such a structure, moisture has been permeable from the room. Moisture becomes humid in the space between the back of the ceiling and the ground surface due to a temperature difference between the inside and outside of the room, and in some cases, condensation may wet the ground surface. Further, even if no condensation occurs, moisture may permeate through the base surface to cause condensation between the heat insulating layer. In addition, when a construction site gets wet in the middle of construction, it may be necessary to postpone the construction until it is dry.

As a countermeasure against such condensation, a ventilation groove is provided in the heat insulating material (see Patent Documents 1 and 2), or a ventilation groove is provided in a polystyrene resin plate disposed between the heat insulating layer and the base material (patents). It is known to release moisture generated between the base material and the heat insulating layer. In addition, it is known to provide a breathable nonwoven fabric layer between the base material and the heat insulating layer (see Patent Document 4).
JP-A-9-228572 JP-A-3-2455 JP 2001-98639 A JP 2000-186380 A

  However, there is a problem that ventilation is not sufficiently performed even when a conventionally known layer provided with a ventilation groove or a non-woven fabric layer having air permeability is provided. For example, in the structures described in Patent Documents 1 to 3, the ratio of the area where the heat insulating material and the resin plate are in contact with the base material (that is, the area where the portion other than the ventilation groove of the heat insulating material and the resin plate is in contact with the base material) Therefore, there has been a problem that moisture that has permeated through the room is difficult to escape. Therefore, it is conceivable to reduce the contact area by enlarging the ventilation groove. However, since the load resistance of the heat insulating material and the resin plate is lowered, there is a limit to the size of the ventilation groove that can be set.

  In addition, the structure described in Patent Document 4 has a problem that not only the entire surface of the nonwoven fabric layer is in contact with the base material but also the airflow resistance of the nonwoven fabric layer against moisture is high. Therefore, it is conceivable to reduce the ventilation resistance by using a low-density nonwoven fabric, but there is a problem that the load resistance of the nonwoven fabric layer is lowered. Furthermore, since the air in the space between the base surface and the back of the ceiling becomes humid and, in some cases, condensation occurs on the base surface, improvement has been desired.

  The present invention has been made on the basis of the above-mentioned knowledge, and can sufficiently release moisture that has permeated from the base material, or moisture in the space between the base material and the ceiling board, and against moisture. It aims at providing the heat insulation waterproof structure of a building provided with the ventilation layer with low ventilation resistance.

The heat insulating waterproof structure for a building according to the present invention includes a heat insulating layer, a base material provided with a space between the heat insulating layer, an intermediate layer in contact with the base material, and a frustum-shaped protrusion. A ventilation layer having a plurality of formed sheet portions, wherein a ventilation portion is defined by the outer surface of the protrusion between the sheet portion and the intermediate layer, and a waterproof layer provided on the outer surface of the sheet portion; And a vent hole that penetrates the base material and the intermediate layer and communicates the space and the vent portion.

  According to the heat insulating waterproof structure for a building according to the present invention, the volume of the ventilation portion can be increased as compared with the case where a groove is provided in a conventional heat insulating material or resin plate. Therefore, it is possible to sufficiently release the moisture that has permeated from the base material, and to obtain a heat-insulating waterproof structure that has low ventilation resistance to moisture and is easy to dry. In particular, when the air hole is provided, the air humidified in the space can be effectively diffused to the outside.

  The base material has a base and a rising portion formed upward with respect to the base, and at least a part of the sheet portion of the ventilation layer is bent so as to be along the rising portion. It is good also as a structure provided as an air | atmosphere part. By comprising in this way, even if it is a case where it provides in the location where the side surface of a heat insulation waterproof structure is obstruct | occluded, moisture can be dehumidified to external air.

  According to the present invention, a plurality of frustum-shaped projections that contact the base material are formed on the sheet portion constituting the ventilation layer, so that the ventilation portion is defined by the outer surface of the projection between the sheet portion and the base material. Therefore, it is possible to sufficiently release the moisture that has permeated from the base material, or the moisture in the space between the base surface and the ceiling board, and heat insulation of the building including a ventilation layer that has low ventilation resistance to moisture. A waterproof structure can be obtained.

  Hereinafter, as an embodiment of a heat insulating waterproof structure according to the present invention, a heat insulating waterproof structure used for a general house, a veranda of a condominium or a building, a roof, a rooftop, and the like will be described with reference to the accompanying drawings. In addition, the same code | symbol shall be used for the element which has the same element or the same function, and the overlapping description is abbreviate | omitted.

  First, the heat insulation waterproof structure which concerns on the 1st Embodiment of this invention is demonstrated using FIGS. 1-3.

  FIG. 1 is a sectional view of a heat insulating waterproof structure for a building according to the first embodiment of the present invention. In FIG. 1, the heat insulating waterproof structure 1 is provided via a structural member (not shown) such as a pillar or a frame so as to cover a space 40 (corresponding to the ceiling behind the building) separated from the living room space 60 by the ceiling board 50. The case where is provided is shown. The thermal insulation waterproof structure 1 of FIG. 1 faces the base material 11 of the building, the air-permeable layer 12 having the sheet portion 122 formed with a plurality of protrusions 121 that contact the base material 11, and the sheet portion 122 of the air-permeable layer 12. The heat insulating layer 13 provided and the waterproof layer 14 provided on the outer surface 13A of the heat insulating layer 13 are provided. In addition, a surface layer 15 that is an arbitrary layer is provided on the outer surface 14 </ b> A of the waterproof layer 14.

  The base material 11 is formed of ALC board (lightweight foamed concrete), plywood, gypsum board, concrete placed in a building, or the like. In order to form the base material 11, concrete is widely used on the roofs of apartments and buildings, but a plasterboard laminated plywood or the like can be used on a veranda or balcony of a general house.

The ventilation layer 12 is a layer made of a non-permeable plastic material that has both flexibility during construction and load resistance after construction, and a polyolefin resin that does not generate harmful gas during combustion is preferably used. More preferably, a polypropylene resin having excellent load resistance is used. In addition, for example, a material having a plane compressive strength of 120 to 4700 kN / m ² and a basis weight of 150 to 1000 g / m ² can be used for the ventilation layer.

  The ventilation layer 12 includes a plurality of protrusions 121, a planar sheet portion 122, and a ventilation portion 123, and is fixed to the base material 11 by fixing means 12F such as screws or anchors as shown in FIG. It is fixed. The protrusion 121 is formed over the entire surface of the sheet portion 122, and the tip 121 a of the protrusion 121 is in contact with the base material 11. Further, the ventilation portion 123 is defined by the outer surface of the protrusion 121 between the sheet portion 122 and the base material 11, and moisture emitted from the base material 11 through the interior of the room is externally exposed from the side of the heat insulating waterproof structure 1. It can be pulled out.

  2 is a plan view of the air-permeable layer 12 as viewed from the surface on which the protrusions 121 are provided, and FIG. 3 is a cross-sectional view of the air-permeable layer 12 taken along line III-III in FIG. As shown in these drawings, the protrusions 121 are arranged in a staggered pattern (see FIG. 2), and the protrusion 121 is a hollow truncated cone having a width A of the front end 121a smaller than a width B of the base 121b. It has a shape (see FIG. 3). In addition, in the region T of FIG. 2 (a rectangular region defined by the centers P of the three tip portions 121a), when the numerical value calculated as the ratio of the area where the tip portion 121a covers the base material 11 is used as the cover rate, The coverage is preferably 30% or less, and more preferably 10% or less. In addition, this cover rate is equal to the ratio which the front-end | tip part 121a covers the base material 11 in conversion per front-end | tip part.

As such a ventilation layer 12, a single cone (manufactured by Ube Nitto Kasei Co., Ltd.) having the following specifications can be suitably used.
(Material) Polypropylene resin (Projection shape) Hollow frustum (Arrangement) Houndstooth (tip diameter) φ2mm
(Base diameter) φ6mm
(Lead center distance E) 8mm
(Protrusion peak height) 6mm
(Sheet thickness) [Sheet part] 0.5 mm
[The thinnest part at or near the protrusion] 0.3 mm
(Ratio of the shortest distance between the base parts to the shortest distance between the tip parts) Distance C: Distance D = 3: 1
(Plane compressive strength) About 1700 kN / m ²
(Weight) 480 g / m ²

In the case of using a single cone of the specification, the area occupied by the one tip portion 121a is about 13 mm ^2, and the coverage is about 6%.

  The heat insulating layer 13 is a foamed plate made of resin such as polystyrene, polyurethane, or polyethylene, and is fixed to the sheet portion 122 of the ventilation layer 12. Such a heat insulating layer 13 can be provided, for example, by fixing a polystyrene foam having a thickness of 30 mm to the sheet portion 122.

  The waterproof layer 14 is made of a material such as a resin sheet or an FRP sheet, and is fixed to the outer surface 13A of the heat insulating layer 13. As such a waterproof layer 14, for example, a glass fiber reinforced unsaturated polyester resin plate having a thickness of 1.2 mm can be used. In the case where the surface layer 15 is omitted and a glass fiber reinforced unsaturated polyester resin plate is used as the surface material, it is preferable to use one provided with flame retardancy by containing aluminum hydroxide.

  The surface layer 15 is composed of a cast-in-place concrete layer, a concrete plate, a tile, a non-combustible material, and the like, and is fixed by adhering to the outer surface 14A of the waterproof layer 14. The surface layer 15 is mainly provided for surface protection and decoration, and for example, a tile (manufactured by Daito Co., Ltd.) can be used.

  Next, a heat insulating waterproof structure for a building according to the second embodiment of the present invention will be described. FIG. 4 is a cross-sectional view of the heat insulating waterproof structure according to the second embodiment. This thermal insulation waterproof structure 101 is different from the thermal insulation waterproof structure 1 according to the first embodiment in that the thermal insulation waterproof structure 101 is provided with a vent hole 171, and the order of the laminated layers is also different from that of the thermal insulation waterproof structure 1.

  In FIG. 4, the case where the heat insulation waterproof structure 101 is provided in the ceiling board 50 used as the boundary of the living room space 60 and the exterior is shown. The heat insulating waterproof structure 101 includes a heat insulating layer 113, a base material 11 provided with a space 140 between the heat insulating layer 113, an intermediate layer 151 in contact with the base material 11, a sheet portion 122, and an intermediate layer 151. A ventilation layer 12 in which a ventilation portion 123 is defined, a waterproof layer 14 provided on the outer surface 122A of the seat portion 122, and a ventilation hole 171 that allows the space 140 and the ventilation portion 123 to communicate with each other. . In addition, the heat-insulating waterproof structure 101 shown in FIG. 4 includes, as an arbitrary configuration, a water-resistant plate material 161 provided between the intermediate layer 151 and the ventilation layer 12 and a surface layer 15 provided on the outer surface 14A of the waterproof layer 14. And.

  Here, since the foundation layer 11, the ventilation layer 12, the waterproof layer 14, and the surface layer 15 have the same configuration as in the case of the first embodiment, detailed description thereof is omitted. The ventilation layer 12 is the same as in the case of the first embodiment in that it has a sheet portion 122 in which a plurality of frustum-shaped projections 121 are formed, but in this embodiment, the ventilation portion is formed by the outer surface of the projection 121. The position where 123 is defined is different not in the position between the sheet portion 122 and the base layer 11 but between the sheet portion 122 and the intermediate layer 151. Also in the present embodiment, similarly to the first embodiment, the ventilation layer 12 may be fixed to other layers by fixing means (not shown) such as screws or anchors.

  The heat insulating layer 113 is a layer having a heat insulating function similarly to the heat insulating layer 13 of the heat insulating waterproof structure 1 according to the first embodiment, and may be fixed to the ceiling board 50 by means such as adhesion. The heat insulating layer 113 can be made of a material such as glass wool, rock wool, or cellulose fiber. In particular, since glass wool and rock wool are inorganic fibers, they are excellent in nonflammability and can be suitably used as a heat insulating layer. The space 140 is formed between the heat insulating layer 113 and the base material 11 by a structural member (not shown) such as a pillar or a frame. In addition, the space | interval between the heat insulation layer 113 and the base material 11 is not specifically limited.

  The intermediate layer 151 is a layer formed of a material such as foamed resin. FIG. 4 shows a case where a gradient forming material having an outer surface 151 </ b> A in which the surface layer 15 is inclined with respect to a horizontal plane is used as the intermediate layer 151. Note that the intermediate layer 151 may be configured as a heat insulating layer having a heat insulating function.

  The water-resistant plate material 161 is made of a material such as a resin sheet or an FRP sheet similarly to the waterproof layer 14 in the first embodiment, and is fixed to the outer surface 151A of the intermediate layer 151 with screws or anchors (not shown). Yes. In addition, when the intermediate layer 151 itself has sufficient water resistance and load resistance, the water-resistant plate material 161 may be omitted.

  The ventilation hole 171 penetrates the base material 11 and the intermediate layer 151 and allows the space 140 and the ventilation part 123 to communicate with each other. In the configuration shown in FIG. 4, since the water-resistant plate material 161 is provided, the vent hole 171 also penetrates the water-resistant plate material 161. The number and formation positions of the air holes 171 are not particularly limited as long as the air holes 171 have a sufficient aspect to diffuse the humid air in the space 140 to the outside. With such a configuration, the air humidified in the space 140 can be effectively diffused to the outside.

  Then, the heat insulation waterproof structure which concerns on the 3rd Embodiment of this invention is demonstrated using FIG.5 and FIG.6. In the heat insulating waterproof structure 2 according to the third embodiment, the base material 11 includes a base portion 11a and a rising portion 111 formed upward with respect to the base portion 11a. Further, at least a part of the sheet portion 121 of the ventilation layer 12 is bent along the rising portion 111 to be provided as the deaeration portion 125. Furthermore, the cover part 21 which covers the end surface 125a of the deaeration part 125 from the upper part is provided, and the heat insulation waterproof structure 2 differs from the heat insulation waterproof structure which concerns on 1st and 2nd embodiment by these points.

  FIG. 5 is an external perspective view showing a case where a heat insulating waterproof structure according to the third embodiment of the present invention is applied to a veranda of a house, and FIG. 6 is a sectional view taken along line VI-VI in FIG. As shown in FIG. 5, the rising portion 111 of the base material 11 located on the outer surface side of the space 40, the ceiling plate 50, and the living room space 60 is formed as a side wall of the veranda. As shown in FIG. 6, a part of the sheet portion 122 of the ventilation layer 12 is bent along the rising portion 111, and the tip portion 121 a of the protrusion 121 is in contact with the rising portion 111. Since the protrusions 121 are formed in a staggered pattern in the deaeration unit 125 in the deaeration unit 125 as well, the deaeration unit 125 communicates with the ventilation unit 123. The cover portion 21 is made of a material such as non-permeable plastic, and is provided so as to cover the end surface 125a of the deaeration portion 125 from above and to release moisture from the vent 21a to the outside air. Further, as shown in FIG. 5, rainwater is prevented from entering the deaeration part 125 of the ventilation layer 12 by covering the cover part 21 except the vent 21 a with the protective layer 31.

  FIG. 6 shows a case where the basic configuration of the heat insulating waterproof structure excluding the rising portion 111, the deaeration portion 125, and the like is the same as that of the first embodiment, but this is the second embodiment. The basic configuration of the form may be replaced.

  The effect of the heat insulation waterproof structure of this invention demonstrated above is demonstrated.

  In the heat insulating waterproof structure of the present invention, a plurality of frustum-shaped projections that contact the base material are formed on the sheet portion constituting the ventilation layer, and the ventilation portion is defined by the outer surface of the projection between the sheet portion and the base material. The As a result, the volume of the ventilation portion can be increased as compared with the case where grooves are provided in the conventional heat insulating material or resin plate, so that moisture that has permeated from the base material can be sufficiently released. In addition, it is possible to obtain a heat-insulating and waterproofing structure that has low resistance to moisture and that allows the base material to dry easily. In particular, as in the configuration according to the second embodiment, when a configuration is provided with a vent hole that communicates the space between the heat insulating layer and the base layer with the vent portion, the air that has been humidified in the space is provided. It can diffuse effectively outside.

  Further, the base material has a base and a rising portion formed upward with respect to the base, and at least a part of the sheet portion of the ventilation layer is provided as a deaeration portion bent along the rising portion. And even if it is a case where it is a case where it is provided in the location where the side surface of a heat insulation waterproof structure is obstruct | occluded, moisture can be released to external air.

  Furthermore, by providing a cover that covers the end surface of the deaeration unit from above, rainwater can be prevented from entering from the end surface of the deaeration unit, and moisture that has passed through the deaeration unit can be released to the outside. be able to.

  In addition, in the cross section of the protrusion formed on the sheet portion constituting the ventilation layer, the area where the ventilation layer contacts the base material can be reduced by making the width of the tip portion smaller than the width of the base portion. That is, the contact area between the space portion (venting portion) of the ventilation layer and the base material can be increased. Therefore, compared with the case where the groove | channel is provided in the conventional heat insulating material and the resin board, the moisture which permeate | transmitted from the base material can be dehumidified to a ventilation | gas_flowing part.

  Furthermore, by using a lightweight and flexible material such as polypropylene in the sheet portion and projections constituting the air-permeable layer in a shape with a high plane compression strength, not only is it easy to carry and install because it is lightweight, A ventilation layer having sufficient strength against the load applied to the upper surface of the heat insulating waterproof structure can be provided. In addition, when the protrusion is formed in the shape of a hollow truncated cone or a truncated pyramid, the sheet portion can be easily formed into a pipe shape by superimposing the protrusions, so that it is easy to carry and construct.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention. Specifically, the structure of the heat insulating waterproof structure of the present invention can be as follows.

  The protrusion 121 of the ventilation layer 12 may be a truncated cone shape, that is, a shape obtained by cutting a cone with a plane parallel to the bottom surface, and may be a truncated cone or a truncated pyramid. Further, the arrangement of the protrusions 121 is not limited to a staggered lattice shape, and may be a lattice shape that is regularly arranged in the vertical and horizontal directions, for example.

  In FIG. 1, although the case where the surface of the heat insulation layer 13 was formed flat is shown, in order to make water easily flow into a drainage groove (not shown) when rainwater accumulates on the surface of the heat insulation waterproof structure 1, As in the intermediate layer 113 in FIG. 4, the surface layer of any one of the layers (for example, the heat insulating layer 13) may be inclined and the surface layer may be inclined with respect to the horizontal plane. On the other hand, FIG. 4 shows a case where a gradient forming material is provided as the intermediate layer 113, but the material constituting the intermediate layer may be a material having a flat outer surface 151A.

  Furthermore, the waterproof layer 14 may not be provided as a sheet such as a resin sheet or an FRP sheet, but may be provided by applying a waterproof paint to the outer surface 13A of the heat insulating layer 13. Similarly, the surface layer 15 may be provided by applying a paint to the outer surface 14A of the resin sheet or FRP sheet used as the waterproof layer 14.

  In addition, in the base material 11 shown in FIG. 6, the base portion 11 a and the rising portion 111 may be formed integrally or as separate members.

It is sectional drawing of the heat insulation waterproof structure which concerns on the 1st Embodiment of this invention. It is a top view of the ventilation layer seen from the surface in which the protrusion is provided. It is sectional drawing of the ventilation layer in the III-III line of FIG. It is sectional drawing of the heat insulation waterproof structure which concerns on the 2nd Embodiment of this invention. It is an external appearance perspective view of the heat insulation waterproof structure which concerns on the 3rd Embodiment of this invention. It is sectional drawing of the heat insulation waterproof structure in the VI-VI line of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 2, 101 ... Thermal insulation waterproof structure, 11 ... Base material, 12 ... Air-permeable layer, 13, 113 ... Thermal insulation layer, 14 ... Waterproof layer, 15 ... Surface layer, 21 ... Cover part, 40, 140 ... Space, 50 ... Ceiling board, 60 ... living room space, 111 ... rising part, 121 ... projection, 122 ... sheet part, 123 ... venting part, 125 ... deaeration part, 151 ... intermediate layer (gradient forming material), 161 ... water-resistant plate material, 171 ... Vents.

Claims (2)

An insulation layer;
A base material provided with a space between the heat insulating layer, and
An intermediate layer in contact with the base material;
A ventilation layer having a sheet portion in which a plurality of frustum-shaped projections are formed, and a ventilation portion is defined by an outer surface of the projection between the sheet portion and the intermediate layer;
A waterproof layer provided on the outer surface of the seat portion;
A ventilation hole penetrating the base material and the intermediate layer and communicating the space and the ventilation part;
Thermal insulation waterproof structure of buildings with. The base material has a base portion and a rising portion formed upward with respect to the base portion,
2. The heat insulating waterproof structure for a building according to claim 1 , wherein at least a part of the sheet portion of the ventilation layer is provided as a deaeration portion bent along the rising portion.

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