JP2009180032A - Exterior wall waterproof structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent water from staying between a waterproof sheet and mortar, and to minimize the amount of the staying water entering an exterior wall underlayer material through a pierced hole formed in the waterproof sheet, even when the staying water enters there. <P>SOLUTION: In the exterior wall 17 formed by placing an exterior wall material 20 of lath mortar, an exterior wall waterproof structure 10 is to prevent the water from entering a wall underlayer panel 13 through the pierced hole formed in the waterproof sheet 14 by driving a tucker pin 18 or a staple 19 into the wall underlayer panel 13, of which the waterproof sheet 14 covers the wall underlayer panel 13 arranged on the outside of an exterior wall skeleton member 11. A face of a synthetic resin base material sheet 21 of the waterproof sheet 14 on the side of the exterior wall material 20 is coated with a nonwoven fabric layer 22, and a face thereof on the side of the wall underlayer panel 13 is coated with an absorptive polymer resin layer 23. The absorptive polymer resin layer 23 firmly adheres to the wall underlayer panel 13 by the driving pressure of the tucker pin 18 or the staple 19. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an outer wall waterproof structure, and more particularly to an outer wall waterproof structure formed by applying an outer wall material made of lath mortar.

  As an outer wall of a building, an outer wall material made of lath mortar is known. The outer wall material made of lath mortar is generally supported by an outer wall frame member such as a pillar or a stud, and an outer wall base material made of, for example, plywood is installed on the outside (outdoor side) of the outer wall base material. After the waterproof sheet is disposed so as to cover the surface, for example, a lath net comprising a lath net body and a wire lath rib is attached, and mortar is laid on the outside of the waterproof sheet.

  In the outer wall in which such a lath mortar outer wall material is constructed, when fixing the waterproof sheet to the outer wall base material or fixing the lath net to the outer wall base material covered with the waterproof sheet, for example, for fixing the waterproof sheet Since a nail member such as a tucker or a staple nail for fixing a lath net needs to be driven through the waterproof sheet into the outer wall base material, a gap between the nail member and the periphery of the nail member formed by the driving is required. Thus, there is a risk that water such as rainwater may enter the outer wall base material side from the outer wall material side by the lath mortar. In addition, if water enters from the outer wall material side to the outer wall base material side due to water leakage, the outer wall base material may be damaged, or mold may be generated in the outer wall base material, which may impair the durability of the outer wall.

For this reason, for example, a technique for preventing water such as rainwater from entering the outer wall base material side through a through-hole formed in the waterproof sheet when the staple nail is driven toward the outer wall base material. Has been developed (for example, Patent Document 1).
JP 2006-348660 A

  On the other hand, in the outer wall in which the outer wall material made of lath mortar is constructed, for example, 0.5 mm between the waterproof sheet and the solidified mortar due to a change in physical properties or shrinkage when the mortar laid on the outside of the waterproof sheet is solidified. A slight gap is likely to occur. If such a gap occurs after the mortar has solidified, for example, rainwater or the like that has entered the gap between the waterproof sheet and the like through a crack or the like generated in the mortar stays in the gap. It becomes easy to form the water column of the height.

  Moreover, when the height of the water staying in the gap between the mortar and the waterproof sheet increases and the water head difference increases, the waterproof sheet or lath net formed on the waterproof sheet attached to cover the outer wall base material is formed. A considerable amount of water pressure is applied to the periphery of the through-hole formed by the nail member for fixing the water, and rainwater or other water is exposed to the outer wall material side by the lath mortar through the gap between the nail member and the through-hole. There is a risk of water leaking into the outer wall base material side. Therefore, it is possible to prevent water from staying with a large water pressure between the waterproof sheet and the mortar, or the retained water can enter the outer wall base material side from the outer wall material side through the through-hole formed in the waterproof sheet. Even so, it is desired to develop a new technology capable of keeping the amount small.

  The present invention can effectively avoid the retention of water with a large water pressure between the waterproof sheet and the mortar, and the retained water from the outer wall material side through the through-hole formed in the waterproof sheet. An object of the present invention is to provide a waterproof structure for an outer wall that can be kept to a small amount even when entering the side.

  The present invention relates to a nail member for fixing a waterproof sheet formed on a waterproof sheet that covers and attaches an outer wall base material installed on the outer side of an outer wall frame member in an outer wall formed by applying an outer wall material made of lath mortar. And waterproofing the outer wall to prevent water from entering the outer wall base material side from the outer wall material side through a through-hole when a nail member for fixing the lath net is driven toward the outer wall base material The waterproof sheet is a waterproof sheet in which the surface of the outer wall material side of the base sheet made of synthetic resin is coated with a nonwoven fabric layer, and the surface of the outer wall base material side is coated with a polymer absorbent resin layer. The outer wall waterproofing made of a material and attached to the outer wall base material in a state where the polymer absorbing resin layer is brought into close contact with the outer wall base material by the driving pressure of the nail member By providing a granulation is obtained by achieving the above object.

  In the outer wall waterproof structure of the present invention, it is preferable that the polymer-absorbing resin layer contains a fungicide.

  Further, in the outer wall waterproof structure of the present invention, the outer wall base material includes a plurality of front side belt-like narrow plates arranged in parallel at intervals and a plurality of back side belt-like narrow plates arranged in parallel at intervals. The wall base panel is preferably formed by joining and integrating in a state of crossing each other.

  Furthermore, in the outer wall waterproof structure of the present invention, it is preferable that the base sheet is made of a polyolefin resin.

  Furthermore, in the outer wall waterproof structure of the present invention, the waterproof sheet preferably has a total light transmittance of 30% or more.

  According to the outer wall waterproof structure of the present invention, water can be effectively avoided from being retained by a large water pressure between the waterproof sheet and the mortar, and the retained wall can be removed through the through-hole formed in the waterproof sheet. Even if it enters the outer wall base material side from the material side, the amount can be kept to a slight amount.

  An outer wall waterproof structure 10 according to a preferred embodiment of the present invention is supported by an outer wall frame member 11 including columns 11a, studs (not shown), a base 11c, beams 11d, and the like as shown in FIGS. 1 and 2, for example. In addition, a windproof sheet 12 made of, for example, a known moisture permeable waterproof sheet is disposed on the outside thereof, and an outer wall base material made of, for example, a wall base panel 13 is installed on the outer side (outdoor side). After the waterproof sheet 14 is disposed to cover the outer surface of the base panel 13, the waterproof sheet 14 is attached to the outer wall 17 of the building formed by attaching the lath net 15 and laying the mortar 16 outside the waterproof sheet 14. A nail member such as a tucker 18 for fixing the wall base panel 13 or a nail member such as a staple nail 19 for fixing the lath net 15 to the wall base panel 13 is used for the wall base panel 1. In order to prevent water from entering the wall base panel 13 side from the outer wall material 20 side by the lath net 15 and mortar 16 (lass mortar) through the through-hole formed in the waterproof sheet 14 when driven toward the wall. It is adopted as the structure of.

  That is, the outer wall waterproof structure 10 of the present embodiment has the waterproof sheet 14 and the mortar 16 firmly adhered to each other, and the mortar 16 laid on the outside of the waterproof sheet 14 is solidified between the waterproof sheet 14 and the mortar 16. As much as possible, a gap is generated between the waterproof sheet 14 and the mortar 16 and water is retained, and the retained water enters the wall base panel 13 side from the outer wall material 20 side. Even in such a case, the amount of the amount is limited to a small amount, and it is possible to effectively prevent the wall foundation panel 13 from being damaged or causing mold on the wall foundation panel 13.

  And the outer wall waterproof structure 10 of this embodiment is the wall as an outer wall base material installed in the outer side of the outer wall frame member 11 in the outer wall 17 formed by constructing the outer wall material 20 by lath mortar (lass net 15 and mortar 16). A nail member such as a tucker 18 for fixing the waterproof sheet 14 and a nail member such as a staple nail 19 for fixing the lath net 15 formed on the waterproof sheet 14 attached to cover the base panel 13 are provided on the wall base. It is a waterproof structure for preventing water from entering from the outer wall material 20 side to the wall base panel 13 side through a through hole when driven toward the panel 13, and the waterproof sheet 14 is made of synthetic resin. The surface of the base sheet 21 on the outer wall material 20 side is coated with the nonwoven fabric layer 22, and the surface of the wall base panel 13 side is coated with the polymer absorbent resin layer 23. Ring was made of waterproof sheet material 24, while being in close contact with the wall base panel 13 a polymer absorption resin layer 23 by implantation pressure Tucker 18 and staple nails 19 are attached to the wall base panel 13.

  In the present embodiment, the windproof sheet 12 is disposed outside the outer wall frame member 11 before the wall base panel 13 is attached to the outer wall frame member 11. As the windproof sheet 12, for example, various well-known moisture-permeable waterproof sheets for construction made of polyolefin resin can be used. In the present embodiment, the windproof sheet 12 is not necessarily laid, and the wall base panel 13 may be directly attached to the outer wall frame member 11.

  Further, in the present embodiment, the wall base panel 13 is preferably arranged in parallel with an interval having the same configuration as the panel member described in, for example, Japanese Patent Application Laid-Open No. 2000-160732 as shown in FIG. A plurality of front side belt-like narrow plates 13a and a plurality of back side belt-like narrow plates 13b arranged in parallel at intervals are joined and integrated in a state of crossing each other. Such a wall base panel 13 can ensure sufficient ventilation between the windproof sheet 12 and the waterproof sheet 14 by raising the air through the space between the strip-shaped narrow plates 13a and 13b. The ventilation layer can be formed, and the band-like narrow plates 13a and 13b inclined in the opposite directions are made to function like braces so that a desired strength as a structural strength member can be obtained. .

  In the present embodiment, as shown in FIG. 2, the surface of the base sheet 21 on the side of the outer wall material 20 is coated with the nonwoven fabric layer 22 as the waterproof sheet 14 attached to cover the wall base panel 13 and the wall base panel 13. A waterproof sheet material 24 whose side surface is coated with a polymer absorbent resin layer 23 is used.

  Here, as the base material sheet 21, for example, a polyolefin resin, a polypropylene resin, a low-density polyethylene, a linear low-density polyethylene, a high-density polyethylene, and ethylene-vinyl acetate that are generally known as polyethylene. A polymer, a copolymer of ethylene and a monomer having a polymerizable double bond, such as an ethylene-methyl methacrylate copolymer, can be preferably used. A single-layer film or a laminated film obtained by mixing these resins alone or in combination can be used.

  Moreover, as a nonwoven fabric which comprises the nonwoven fabric layer 22, it manufactured by well-known manufacturing methods, such as a chemical bond, a thermal bond, a needle punch, a stitch bond, a spunlace, a spunbond, a melt blow, a wet method, What consists of a polyester-type or polyolefin-type nonwoven fabric can be used preferably. Moreover, it is preferable to use the nonwoven fabric which is excellent in tear strength and weather resistance, and also has moisture permeability and waterproofness.

  Furthermore, examples of the highly water-absorbing resin (high water-absorbing polymer) constituting the polymer-absorbing resin layer 23 include natural materials such as cellulose / acrylonitrile polymer, starch / acrylonitrile polymer, acrylic acid / Synthetic materials such as vinyl alcohol copolymer, sodium acrylate polymer, acrylic acid / acrylamide copolymer, modified polyethylene oxide, isobutylene / maleic anhydride copolymer, etc. can be preferably used. It is particularly preferable to use a sodium acrylate-based one.

More specifically, in the present embodiment, a sheet material having a thickness of 140 μm made of a resin in which, for example, 80% by weight of polypropylene and 20% by weight of polyethylene are mixed is used as the base material sheet 21, and this is the side of the wall base panel 13 side. The surface of the outer wall material 20 is coated with a sodium acrylate-based superabsorbent polymer uniformly at a coating amount of 8 g / m ² to form a polymer-absorbing resin layer 23, A waterproof sheet material 24 in which a nonwoven fabric layer 22 is formed by pasting a polyolefin-based nonwoven fabric with a basis weight (weight per unit area) of 12 g / m ^{2 on} the back surface is used as the waterproof sheet 14.

  Moreover, in this embodiment, it is preferable that the polymer absorption resin layer 23 contains the antifungal agent. As an antifungal agent, for example, organic iodine, surfactant, biguanide, alcohol, phenol, anilide, iodine, imidazole, thiazole, isothiazole, triazine, nitrile, fluorine, Organic fungicides such as saccharides and tropolone, and inorganic powders such as zeolite, silica, alumina, zirconium phosphate, calcium phosphate, zirconium phosphate, calcium silicate, silica gel, glass, zinc oxide, silver, copper Various types of anti-fungal agents known as anti-fungal agents, such as organic anti-fungal agents carrying an antibacterial metal such as zinc, can be used. Since the polymer absorbent resin layer 23 contains a fungicide, the polymer absorbent resin layer 23 has a through-hole formed in the waterproof sheet 14 when a nail member such as a tucker 18 or a staple nail 19 is driven. Even when the water absorbed on the wall foundation panel 13 side of the waterproof sheet 14 is retained for a long time by absorbing water that has entered from the outer wall material 20 side to the wall foundation panel 13 side through swelling, the retained water Therefore, it is possible to effectively avoid the occurrence of mold on the wall base panel 13 due to the influence of the above.

  Furthermore, in this embodiment, it is preferable that the total light transmittance of the waterproof sheet 14 is 30% or more. Since the total light transmittance of the waterproof sheet 14 is 30% or more, it becomes possible to easily visually recognize the back-side wall foundation panel 13 from the front side (surface on the outer wall material 20 side) of the waterproof sheet 14. Each strip-shaped narrow plate 13a, 13b is formed by joining and integrating a plurality of front-side strip-shaped narrow plates 13a and a plurality of back-side strip-shaped narrow plates 13b, in which the wall base panel 13 is arranged in parallel at intervals. Even if there is a gap portion between them, it is possible to reliably drive the tucker 18 and the staple nails 19 toward the band-like narrow plate 13a on the front side while avoiding such a gap portion.

  Furthermore, in this embodiment, when fixing the waterproof sheet 14 so as to cover the wall base panel 13, it is preferable to drive the tucker 18 toward the wall base panel 13 using a known dedicated driving device. By driving the tucker 18 using a dedicated driving device, the polymer absorbing resin layer 23 of the waterproof sheet 14 can be brought into close contact with the wall base panel 13 in a strong and stable state by the driving pressure. If the adhesion between the polymer absorbent resin layer 23 of the waterproof sheet 14 and the wall base panel 13 is insufficient at the portion where the tucker 18 is driven, the polymer absorbent resin layer 23 is formed on the waterproof sheet 14. Even if it swells by absorbing water that has entered the wall base panel 13 side through the through hole, the water blocking function of the through hole by the swollen polymer absorbent resin layer 23 can be sufficiently exhibited. There is a risk of disappearing.

  In the present embodiment, the outer wall 17 of the building is formed by constructing the outer wall material 20 composed of the lath net 15 and the mortar 16 (lass mortar) outside the wall base panel 13 to which the waterproof sheet 14 is attached. . As the lath net 15, for example, various known lath nets for an outer wall composed of a lath net body 15 b and a wire lath skeleton 15 a can be used. For example, the lath net 15 is driven at a pitch of about 100 mm toward the wall base panel 13 to fix the wire lath force bone 15a, so that the lath net main body 15b is placed at a substantially central portion of the mortar 16 in the thickness direction. It is attached to the wall base panel 13 in the arranged state.

  Here, the staple nails 19 are preferably driven toward the wall base panel 13 using a known dedicated driving device. By driving the staple nail 19 using a dedicated driving device, the polymer absorbing resin layer 23 of the waterproof sheet 14 can be brought into close contact with the wall base panel 13 in a strong and stable state by the driving pressure. Thereby, when the polymer absorbent resin layer 23 absorbs the water that has entered the wall base panel 13 side through the through-hole formed in the waterproof sheet 14 and swells in the portion where the staple nail 19 is driven, It is possible to firmly stop the through hole.

  Moreover, in this embodiment, the well-known various mortar mix | blended for outer walls can be used as the mortar 16 laid outside the waterproof sheet 14, and the lath net 15 is attached by a method similar to the prior art. For example, it is applied to the outside of the waterproof sheet 14 with a thickness of about 15 to 30 mm. When the applied mortar 16 is solidified, the outer wall waterproof structure 10 of the present embodiment is formed.

  And according to the outer wall waterproof structure 10 of the present embodiment having the above-described configuration, it is possible to effectively avoid the water from being retained between the waterproof sheet 14 and the mortar 16 with a large water pressure, and the retained water is the tucker. Even when the outer wall material 20 side enters the wall base panel 13 side through the through-hole formed in the waterproof sheet 14 when the 18 or the staple nail 19 is driven, the amount can be kept small. Become.

  That is, according to the outer wall waterproof structure 10 of the present embodiment, the waterproof sheet 14 that covers and attaches the wall base panel 13 coats the outer wall material 20 side surface of the synthetic resin base material sheet 21 with the nonwoven fabric layer 22. In addition, since the wall base panel 13 side surface is made of the waterproof sheet material 24 coated with the polymer absorbing resin layer 23, the nonwoven fabric layer 22 is interposed between the base sheet 21 and the mortar 16, and the waterproof sheet. 14 and the mortar 16 are firmly adhered to each other, so that no gap is generated between the waterproof sheet 14 and the mortar 16, or even if a gap is generated, it can be kept in a very small gap. In addition, even if a gap is generated between the waterproof sheet 14 and the mortar 16 and water such as rainwater stays, it stays immersed in the nonwoven fabric layer 22, so that the nonwoven fabric layer 22 has an action such as capillary tension. It is possible to effectively relieve the generation of a large water pressure due to the accumulated water.

  Furthermore, even if the accumulated water enters the base panel 13 side through the through hole, the polymer absorbent resin that is coated on the wall base panel 13 side of the base sheet 21 and is in close contact with the wall base panel 13 Since the layer 23 absorbs the water that has entered and swells, the through hole is blocked and water that is going to enter subsequently is blocked, so that the water entering the wall base panel 13 side is extremely absorbed. Can be kept in a slight amount.

  In addition, according to the present embodiment, the wall base panel 13 is joined and integrated in a state where the plurality of front side strip-like narrow plates 13a and the plurality of back side strip-like narrow plates 13b arranged in parallel with each other intersecting each other. Since the air-permeable layer that raises the air can be formed through the space between the strip-shaped narrow plates 13a and 13b, the polymer absorbent resin layer 23 absorbs the infiltrated water and swells. Thus, even when water absorbed on the wall base panel 13 side of the waterproof sheet 14 is retained, the retained water can be dried by the air passing through the ventilation layer and absorbed by the polymer absorbent resin layer 23. By preventing the water from being retained for a long period of time, it is possible to more effectively avoid the occurrence of mold on the base panel 13.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the outer wall base material is not necessarily a wall base panel formed by joining and integrating a plurality of front side belt-like narrow plates and a plurality of back side belt-like narrow plates that are arranged in parallel at intervals. There may be other various outer wall base materials such as plywood. It may be a vertical trunk edge or the like capable of forming a ventilation layer. Further, the outer wall may be formed by arranging a heat insulating material in a portion surrounded by the outer wall framework member on the back side of the outer wall base material.

It is a schematic perspective view explaining the structure of the outer wall in which the outer wall waterproof structure which concerns on preferable one Embodiment of this invention is provided. It is principal part sectional drawing explaining the structure of the outer wall waterproof structure which concerns on preferable one Embodiment of this invention. It is a front view of the wall base panel (outer wall base material) used in the outer wall waterproof structure which concerns on preferable one Embodiment of this invention.

DESCRIPTION OF SYMBOLS 10 Outer wall waterproof structure 11 Outer wall frame member 12 Windproof sheet 13 Wall base panel (outer wall base material)
13a, 13b Strip-shaped narrow plate 14 Waterproof sheet 15 Lath net 15a Wire lath skeleton 15b Lath net body 16 Mortar 17 Outer wall 18 Tucker (nail member)
19 Staple nails
20 Outer wall material 21 Base material sheet 22 Non-woven fabric layer 23 Polymer absorbent resin layer 24 Waterproof sheet material

Claims (5)

In the outer wall formed by constructing the outer wall material by lath mortar, a nail member and a lath net for fixing the waterproof sheet formed on the waterproof sheet attached to cover the outer wall base material installed outside the outer wall frame member An outer wall waterproof structure for preventing water from entering the outer wall base material side from the outer wall material side through a through-hole when a nail member for fixing is driven toward the outer wall base material. ,
The waterproof sheet is made of a waterproof sheet material in which the outer wall material side surface of the synthetic resin base material sheet is coated with a nonwoven fabric layer, and the outer wall base material side surface is coated with a polymer absorbent resin layer, An outer wall waterproof structure attached to the outer wall base material in a state in which a polymer absorbing resin layer is brought into close contact with the outer wall base material by a driving pressure of the nail member.   The outer wall waterproof structure according to claim 1, wherein the polymer-absorbing resin layer contains a fungicide.   The outer wall base material is joined and integrated in a state in which a plurality of front side belt-like narrow plates arranged in parallel at intervals and a plurality of back side belt-like narrow plates arranged in parallel at intervals are crossed with each other. The outer wall waterproof structure according to claim 1 or 2, comprising a wall base panel.   The outer wall waterproof structure according to claim 1, wherein the base sheet is made of a polyolefin-based resin.   The outer wall waterproof structure according to any one of claims 1 to 4, wherein the total light transmittance of the waterproof sheet is 30% or more.

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