JP5880910B2 - Construction method of outer wall with ventilation layer - Google Patents

Description

The present invention uses a waterproof sheet for a ventilation method that also contributes as a waterproof layer for the outer wall of a building, so that mortar coating can be stably applied as compared with the conventional construction method, and a sufficient thickness of the ventilation layer can be secured, further relates to a method of constructing the outer wall (airflow method) comprising a ventilation layer can reduce the number of materials count and process.

The outer wall ventilation layer is recognized as a ventilation layer by securing an air layer of 12 mm or more between the outer wall and the base.
In the case of constructing the outer wall provided with the ventilation layer, a ventilation structure using a column (body edge) as a spacer as shown in FIGS. 5 (a) to 5 (c) is generally employed.
First, in the wall-type structure shown in FIG. 5A, support columns 8 are erected at an appropriate interval, and a base plate 3 such as a plywood is nailed to the support columns 8 with nails or the like. Next, waterproof paper 9 is affixed to the outside of the base plate 3, and a support 10 for forming a ventilation layer is nailed on the waterproof paper 9 with nails, anchor pins, or the like. Further, a felt 11 is stuck on the support 10, and a lath net 12 is fixed on the felt 11 with staples or the like, and a viscous mortar 6 is applied on the felt 11 through the lath net 12. Yes. The lath net 12 may be made of resin or metal. In any case, the lath net 12 makes it easier for the mortar 6 to be fixed on the felt 11 and prevents the mortar 6 from cracking. Can be. In addition, the base plate 3 includes a wooden one and a foamed one, and the latter can add heat insulation performance by adding a thickness.
Further, in the shaft assembly structure of FIG. 5B, the support column 10 for forming the air-permeable layer is installed on the shaft 12 standing at an appropriate interval, and the felt 11 is attached to the support column 10. The lath net 12 is fixed on the felt 11 with staples or the like, and the viscous mortar 6 is applied on the felt 11 via the lath net 12. The lath net 12 may be made of resin or metal. In any case, the lath net 12 makes it easier for the mortar 6 to be fixed on the felt 11 and prevents the mortar 6 from cracking. Can be.
Further, in the off-axis heat insulating structure of FIG. 5C, the heat insulating material 14 is appropriately erected on the shaft 13, and the support column 10 for forming a ventilation layer is provided thereon. Further, a felt 11 is attached to the support column 10, and a lath net 12 is fixed on the felt 11 with staples or the like, and a viscous mortar 6 is applied on the felt 11 via the lath net 12. The lath net 12 may be made of resin or metal. In any case, the lath net 12 makes it easier for the mortar 6 to be fixed on the felt 11 and prevents the mortar 6 from cracking. Can be.

In recent years, a sheet in which a plurality of minute convex portions are provided on the surface of a moisture permeable waterproof sheet or a waterproof sheet having no moisture permeability is also commercially available.
By disposing these waterproof sheets on the base, an air layer corresponding to the height of the convex portions on the surface is formed.

  However, since the ventilation structure shown in FIG. 5 is diverted so that the construction method used for siding can be used in the lath mortar construction method, the span of the ventilation layer is long, and the fastened lath is easy to bend. Workability fell and it was difficult to make the mortar thickness constant. Further, between the support column 8 and the mortar 6, the base plate 3, the waterproof paper 9, the support column 10 for forming the ventilation layer, and the felt 11 are laminated, and the lath net 12 is further laminated. The work of fixing each of them and the material management of a large number of members are troublesome, and further, the construction period for constructing the walls of the building is prolonged.

In addition, the extremely thin air layer formed by using a sheet having a plurality of minute convex portions on the surface of the moisture permeable waterproof sheet or the waterproof sheet having no moisture permeability has a very small thickness. Therefore, it was not possible to allow dewed water to flow down or moisture that had entered from the outside of the room to flow down. In addition, even if an attempt is made to attach a spacer to the inner surface side in order to increase the thickness of the air layer, the spacer cannot be attached due to low support strength.
Furthermore, as a similar existing general-purpose product, when a sheet that has a large number of independent air chambers and is widely used for packaging of cracked objects is stretched on the base plate, there are few irregularities in itself, so ventilation Since only a thin layer (about 3 mm) can be made, sufficient ventilation could not be obtained. Moreover, in order to make the air layer thicker, when creating a sheet with a large air chamber, it is necessary to make the sheet larger as it is a custom-made product. The cost was higher than that.

Therefore, the present invention uses a waterproof sheet for a ventilation method that also contributes as a waterproof layer for the outer wall of a building, so that mortar coating can be stably applied compared to conventional construction methods, and a sufficient ventilation layer the thickness can be secured, and further, an object of the invention to provide a method of constructing the outer wall provided with a ventilation layer can reduce the number of materials count and step (aeration method).

The present invention has been proposed in view of the above . First, a resin waterproof sheet having a plurality of tapered protrusions, in which air vent holes are formed on the top or side, is attached to a base. And a second step of applying mortar or concrete so as to be filled in the protruding portion, and a method for constructing an outer wall having a ventilation layer (aeration method).
The protrusion may be, for example, semicircular in cross section, triangular in cross section, or stepped in cross section (see FIG. 7).

In addition, the present invention, after performing the first step of attaching a resin waterproof sheet having a plurality of tapered projections on the base, on the top or side surface of which air vent holes are formed, And a second step of applying mortar or concrete so as to be filled in the protruding portion after the step of fixing the netting material on the outer surface side, and a method for constructing the outer wall comprising a ventilation layer ( We also propose a ventilation method .

Furthermore, the present invention provides a first step of fixing a top portion of a protruding portion with a reinforcing member together with a reinforcing member when a resin waterproof sheet having a plurality of tapered protruding portions is mounted on a base, and filling the protruding portion. The construction method (venting method) of the outer wall provided with the ventilation layer characterized by performing the second step of applying mortar or concrete as described above .

In addition, the present invention provides an outer surface side after performing the first step of fixing the top of the protrusion with a reinforcing member together with the reinforcing material when mounting the resin waterproof sheet having a plurality of tapered protrusions on the base. And a second step of applying mortar or concrete so as to be filled in the protrusions after that, and a method for constructing an outer wall having a ventilation layer (aeration method) ) Is also proposed.

Further, the present invention provides a method for constructing an outer wall having a ventilation layer, characterized in that in the first step, the reinforcing material is fixed together with a fixture when the top of the projection is fixed to the base in the first step. I also propose.

The present invention also proposes a method for constructing an outer wall provided with a ventilation layer, wherein in the ventilation method, the protrusion has a protrusion height of 13 to 18 mm .

In the construction method of the outer wall provided with the air-permeable layer of the present invention, the mortar or concrete filled in the plurality of protrusions is attached to the resin waterproof sheet and mortar or concrete is attached to the surface of the air-permeable layer. By acting as a leg to hold, the ventilation layer can be held even when the resin waterproof sheet is deteriorated by long-term exposure.
In addition, since the resin waterproof sheet on the outer wall has high waterproof performance (water-proofing property), the formed air-permeable layer also acts as a drainage layer for allowing condensed water and moisture that has entered from the outdoor side to flow down.
Furthermore, since the protrusion has a tapered surface, the water adhering to the tapered surface is guided to the outside and drained without being stored inside.
On the other hand, in the case where a sheet having a plurality of minute convex portions is provided on the surface of a moisture-permeable waterproof sheet that has been marketed in recent years or a waterproof sheet that does not have moisture permeability, an extremely thin air of about several millimeters is provided. Although a layer was formed, a sufficient ventilation effect could not be obtained with this extremely thin air layer. In addition, in the moisture permeable waterproof sheet or a sheet provided with a plurality of minute convex portions on the surface of a waterproof sheet that does not have moisture permeability, for example, even if trying to attach a spacer for the purpose of thickening the air layer, There was a problem that it could not be attached substantially due to low support strength.

Also, if the network material on the outer surface side of the resin tarpaulin is fixed, and reducing the drying shrinkage of mortar or concrete layer, the rubber elasticity is imparted with (tensile stress dispersion) tensile strength reinforcement to, the As a result, cracking of the mortar can be prevented.

Furthermore, the construction method (venting method) of the present invention comprises first and second steps that can be easily carried out, and fixes a column and a trunk edge for forming a conventional ventilation layer. Since the first step of attaching the resin waterproof sheet to the base may be performed instead of the work, it can be performed very easily and has a very high practical value. In addition, regarding the resin waterproof sheet, the adjustment of the desired shape and height of the protrusions or the interval between the protrusions can be easily and inexpensively performed. Can be formed.
In addition, as described later, the resin waterproof sheet may or may not be formed with an air vent hole on the top or side surface of the projection, and in the latter case, it also functions as a water shielding layer. Will be. The formed air-permeable layer also acts as a drainage layer that allows the condensed water and moisture that has entered from the outdoor side to flow down.
In addition, when constructing a resin waterproof sheet after applying a moisture permeable waterproof sheet specified in JIS A6916, drill holes in the previously constructed moisture permeable waterproof sheet using, for example, staples used for fastening a reinforcing material. If water enters the ventilation layer, there is a possibility that water may enter from the hole in the moisture-permeable waterproof sheet. However, as will be described later, the water that has entered the ventilation layer is gelled by applying a water-stopping material in advance to the top of the projection of the resin waterproof sheet (inside the room, the part that contacts the waterproof paper). Since it prevents water more than the absorbed water from entering, it can be prevented from entering the inside of the wall from the hole of the moisture permeable waterproof sheet.

  In addition, in the ventilation method in which the step of fixing the mesh material on the outer surface side after the first step is performed and then the third step is performed, the outer wall on which the mesh material having the above-described excellent characteristics is fixed Can be easily constructed.

In addition, the ventilation method in which a hole for air venting is formed on the top or side of the protrusion is excellent in filling of the mortar or concrete into the protrusion, and the mortar or concrete can be applied once. Can be completed.
Further, regarding the hole of the protrusion, there is no hindrance in use even if a part of the protrusion is broken at the time of transportation or the like, and it can be easily repaired.
In addition, when the air vent hole is not formed on the top or the side surface of the protrusion, it functions as a water shielding layer as described above, but there is a poor filling of the mortar (or concrete) into the protrusion. In some cases, voids are generated in the protrusions and the surface of the work may be raised, so that it may be necessary to apply again after curing.

Also, in the first step, the venting method in which the reinforcing material is fixed together with a fixing tool when fixing the top of the protruding portion to the base is difficult to cause the protruding portion to be crushed. It will be formed.
Furthermore, when the reinforcing material also serves as a member for fixing the net member having means for attaching to the net member, the step of fixing the net member can be easily performed with a small number of members.

  Further, in the ventilation method in which the protrusion has a protrusion height of 13 to 18 mm, an air layer having a thickness of 13 to 18 mm is formed and is recognized as a ventilation layer.

It is a perspective view which shows one Example of the waterproof sheet for ventilation construction methods of this invention. It is a perspective view which shows one Example of an outer wall provided with the ventilation layer of this invention. (A) The top view which shows one shape of the reinforcing material of one Example used for the construction method of an outer wall provided with the ventilation layer of this invention, (b) It is the sectional drawing. (A) The top view which shows one shape of the reinforcing material of another Example used for the construction method of an outer wall provided with the ventilation layer of this invention, (b) It is the sectional drawing. (A) Side sectional view showing an outer wall structure (wall type structure) having a conventional air layer, (b) Perspective view showing another outer wall structure (shaft structure) having a conventional air layer, (c) Conventional It is a perspective view which shows the other outer wall structure (shaft assembly outer heat insulation structure) which has an air layer. (A) The side view and front view of a lower end raising, (b) It is sectional drawing which shows the construction state which has arrange | positioned this lower end raising to the lower end of a ventilation layer. (A) The waterproof sheet is provided with a semicircular protrusion, and a cross-sectional view showing an outer wall using a convex reinforcing material (lass net), (b) the waterproof sheet is provided with a substantially triangular protrusion, Sectional drawing which shows the outer wall using the reinforcing material (lass net) which gave the convex process, (c) The outer wall which used the reinforcing material (lass net) which gave the convex process and the waterproof sheet was provided with the stepped projection part FIG.

  A resin waterproof sheet used for the outer wall including the air-permeable layer of the present invention and the construction method thereof is configured to include a plurality of protrusions including a tapered surface, and the side on which the protrusions are formed is fixed on the ground side, By attaching mortar or concrete, the mortar or concrete attached to the protrusions becomes a leg for holding the air-permeable layer. That is, a ventilation layer (air layer) can be provided between the base and the resin waterproof sheet.

The resin waterproof sheet can be manufactured using plastics such as polyethylene, polypropylene, polystyrene, acrylic, vinyl chloride, and the thickness is not particularly limited, but the mass is 200 to 800 g / m ^2. It is desirable that If the mass is less than 200 g / m ² , the strength is too low to maintain the shape of the protrusion when mortar or concrete is applied. When the mass exceeds 800 g / m ² , the resin waterproof sheet itself is too heavy, which causes heavy labor in construction and causes slipping when fixed to the base.

  The protrusion of the resin waterproof sheet may have a tapered surface, and the tapered surface may be a semicircular cross section as shown in FIG. 7 (a) or a triangular cross section as shown in FIG. 7 (b). The shape and the stepped shape of the cross section as shown in FIG. 7 (c) are not particularly limited, and the size, shape, arrangement, arrangement interval, etc. are not particularly limited, Has a projection height of 12 to 20 mm, more preferably a projection height of 13 to 18 mm (13 mm or more and less than 18 mm). The shape of the protrusion is most preferably a frustoconical shape that is easy to discharge even if rainwater or condensed water enters the protrusion, as shown in the illustrated embodiment described later. The protrusions may be arranged in a grid pattern or a staggered pattern, but a grid pattern is preferable when air flow is taken into account, and a turbulent flow occurs in the staggered pattern. Moreover, about the arrangement | positioning space | interval of a projection part, when a projection height is 13-18 mm, as an arrangement | positioning space | interval, 50-150 mm is preferable.

  As described above, the mortar or concrete attached to the protrusions serves as a leg for maintaining a ventilation interval (air-permeable layer). Therefore, the protrusions are preferably provided at appropriate positions, and the protrusions are formed in an excessively dense shape. In such a case, the flow of the formed air-permeable layer is deteriorated. Conversely, if the number of protrusions is excessively small, the legs holding the air-permeable layer become unstable and the air-permeable layer is easily crushed.

In addition, since the resin waterproof sheet on the outer wall has high waterproof performance (water-proofing property), the formed air-permeable layer also acts as a drainage layer for allowing condensed water and moisture that has entered from the outdoor side to flow down. That is, since this resin waterproof sheet also serves as waterproof paper, it does not require waterproof paper such as asphalt felt to be applied to the base.
In addition, although this water-blocking property is impaired, you may make it form the hole for air venting in a projection part.

  In addition, as a water-stopping material to be applied in advance to the indoor side of the top portion of the projection of the resin waterproof sheet, the water that has been in contact (penetrated) as described above is absorbed (absorbed) and gelled. There is no particular limitation as long as it functions to prevent intrusion. For example, it is desirable to use a highly water-absorbent resin, and there are starch-based, cellulose-based, and synthetic polymer-based highly water-absorbent resins, and the water-soluble cellulose ethers such as methylcellulose and carboxymethylcellulose are not particularly limited. It is suitable for use because it is inexpensive and easily available. When using these water-stopping materials, it is desirable to confirm the application amount and the water-stopping effect by experiments.

If this protrusion is filled with mortar or concrete, a leg that supports the air-permeable layer is formed. Since the planar shape of the protrusions may remain on the surface so as to be lifted, it is necessary to level the surface again with a trowel or the like in that case. Therefore, an air vent hole may be formed on the top or side surface of the protrusion. The shape and size of the air vent hole are not particularly limited, but the hole size is preferably 2 mm or more in diameter. It may be provided at a location, and it is preferable to make a hole from the inside (= the top of the protrusion) to the outside.
In addition, since the air vent hole does not have to have a predetermined shape such as a circular shape, for example, a hole formed in a top portion or the like using an appropriate tool for construction may be used, and a crack may be formed more than expected. If it has been repaired, it may be repaired with tape or the like.

When attaching the resin waterproof sheet on the base, the top of the protrusion may be attached with a fixture such as a staple, but at that time, the reinforcing material is placed along the top of the protrusion and the inside of the side surface. You may make it attach integrally. This reinforcing material is particularly preferable when a low-strength resin waterproofing sheet is used, and it helps maintain the shape of the protrusions and assists the filling of mortar or concrete. Will be.
If the resin waterproof sheet is fixed by simply using staples or the like without using this reinforcing material, the resin waterproof sheet itself is extremely lightweight, so there will be no problem at the time of fixing, but mortar or concrete is applied. Since the applied weight is generated at the protruding portion where the staple is fixed, the protruding portion may be deformed and slipped depending on the material of the resin waterproof sheet, and the leg for holding the ventilation layer may not be formed.
Further, the internal shape of the protrusion is not particularly limited as described above. For example, when the reinforcing material (member for fixing the net material) described later is arranged in a certain direction as necessary, A cross-shaped or polygonal groove or ridge may be formed on the bottom surface or side surface of the protrusion so that it can be installed in a fitting manner as in the case of 7 (c), and a reinforcing material is fitted into this groove or ridge. Thus, it is possible to temporarily fix the reinforcing material.
That is, by forming a groove or a bulge inside the protrusion, the reinforcing material (mesh fixing member) can be aligned and attached in a certain direction. Further, the reinforcing material can be temporarily fixed using the groove and the bulge.

Such a reinforcing material is not particularly limited in its configuration, but is provided inside the protruding portion of the resin waterproof sheet, and therefore includes a main body having a height of the protruding portion +2 to 10 mm. It is desirable to provide an attaching means that can easily fix the mesh material in a state where it is fixed in the protruding portion. For example, by providing a hook (claw) as shown in the illustrated embodiment as the attaching means, It may also serve as a mesh material fixing member that can easily attach and fix the material. And the net | network material attached to an attachment part can be installed in the inside of mortar or concrete by forming a main-body part in the height of projection part + 2-10 mm as mentioned above.
Further, even if the reinforcing material itself is not provided with an attaching means, the netting material may be fixed by driving a fixing tool such as a staple into the reinforcing material from the outside in a state where the netting material is arranged.

In the outer wall and the construction method (venting method) of the present invention, a net material such as a metal lath may be provided.
Further, in this case, a net material may be integrally attached to the resin waterproof sheet in advance, or the net material may be attached by the net material fixing member as described above. Also good. In the case where the mesh material is integrally attached to the resin waterproof sheet in advance, the strength of the resin waterproof sheet itself is low, so that the mesh material plays a role of protecting the resin waterproof sheet.

  The construction method (ventilation method) of the present invention includes a first step of attaching the resin waterproof sheet on a base, and a second step of applying mortar or concrete so as to be filled inside each projection. What is necessary is to perform the first step of attaching a resin waterproof sheet in place of the work of fixing the support post and the trunk edge for forming the conventional air-permeable layer. It may be carried out as usual.

  When attaching the resin waterproof sheet as shown in the illustrated embodiment to be described later, the reinforcing material positioned in the protrusion is integrally attached with a fixing tool such as staples, and is provided on the attached reinforcing material (mesh fixing member). If the mesh material is attached to the hook (attachment means), the mesh material can be easily arranged.

  In addition, a ruler (lower end raised) having a plurality of rectangular vents as shown in FIG. 6 (a) is attached to the lower end of the wall body in advance before attaching the resin waterproof sheet as shown in FIG. 6 (b). By installing it horizontally, ventilation and rainwater can be discharged from a plurality of rectangular ventilation holes. Thus, since it is possible to construct mortar or concrete with a uniform thickness while ensuring ventilation to the wall, it is possible to finish with an excellent aesthetic appearance.

  About the 2nd process in the said construction method, what is necessary is just to carry out as usual as above-mentioned, but description is abbreviate | omitted, However, you may use how to use well-known means and materials, Hardening mortar, concrete, etc. What is necessary is just to apply | coat a composition until a net | network material fills and becomes flat.

The resin waterproof sheet 1 shown in FIG. 1 is made of PET resin and has a mass of 400 g / m ² (thickness of 0.5 to 0.7 mm). The protrusion height of the protrusion 2 formed in a truncated cone shape is 15 mm. The arrangement | positioning space | interval of the projection part 2 is 120 mm, and consists of 1m x 2m plate shape.

The outer wall shown in FIG. 2 is fixed to the base 3 with the resin waterproof sheet 1 in a state where the top of the protrusion 2 is in contact with the base 3, and each of the protrusions 2 is filled with mortar 6, The state which becomes the leg which hold | maintains the layer 5 is shown.
Although not shown in FIG. 2, the resin waterproof sheet 1 is fixed to the base 3 by using a reinforcing member 4 (laser fixing member) shown in FIG. 3 to be described later. The reinforcing material 4 is a molded product molded in advance, and a portion excluding the claw 7 is formed of a material (steel material or the like) that is not easily deformed.

FIG. 3 shows a state in which the resin waterproof sheet 1 is fixed to the base 3 using the reinforcing material 4 (lass fixing member) for fastening the lath net (net material) 12.
The reinforcing material 4 (lass fixing member) of the illustrated embodiment is a piece material composed of a main body portion 4a accommodated in the protrusion portion 2 and a flange-shaped attachment portion 4b. It is a frustoconical shape with a height of +2 to 10 mm, and is fixed to the base 3 integrally with the staple 15 in a state where the substantially circular bottom portion is aligned with the inner surface of the top portion of the protruding portion 2 of the resin waterproof sheet 1. ing.
As shown in FIG. 3 (a), the lath fixing member 4 is formed with a mounting portion 4b which is an annular flange, and a claw 7 serving as mounting means for fixing the lath net 12 to the mounting portion 4b. Are provided at four locations, and can be easily fixed by bending the claw 7 when the lath net 12 is installed.

FIG. 4 shows a state in which the resin waterproof sheet 1 is fixed to the base 3 using another lath fixing member 4 ′ for fastening the lath net (net material) 12.
The lath fixing member 4 ′ in this illustrated embodiment is a piece material having a shape obtained by bending a rectangular plate material into a valley shape deeper than the protrusion 2 of the resin waterproof sheet 1, and the main body 4 a ′ is the protrusion 2. In a valley shape (substantially U-shaped) portion having a height of 2 to 10 mm, with the valley-shaped bottom portion of the main body portion 4a 'being along the inner surface of the top portion of the protruding portion 2 of the resin waterproof sheet 1 15 is integrally fixed to the base 3.
As shown in FIG. 4 (a), the lath fixing member 4 'is formed with a mounting portion 4b' which is a left and right flange-like flat portion, and the lath net 12 is fixed to the mounting portion 4b '. As attachment means for this, claw 7 'is provided in two places on the left and right, and when claw 7' is installed, it can be easily fixed by bending claw 7 '.

As is clear from comparison between FIGS. 2 to 4 which are examples of the present invention and the conventional FIG. 5, the base 3-resin waterproofing sheet 1 on the outer wall provided with the ventilation portion of the present invention is a conventional one. It is clear that it corresponds to the base material 3 on the outer wall 3, the waterproof paper 9, the support 10, and the felt 11, and the work of fixing each member can be replaced with the work of attaching a single member. Obviously, it can be shortened.
Further, in the first step, the top portion of the protrusion 2 of the resin waterproof sheet 1 is fixed on the base 3 by the net material fixing member 7, and in the second step, the net material fixing member 4 is fixed to the base material 3. When the net member 12 is attached, a structure of [waterproof sheet 1-vent layer 5-net member 12] can be easily constructed. That is, in the work of fixing the support 10 and the trunk edge for forming the conventional air-permeable layer 5, a large number of members are required and the construction is troublesome. However, in the construction method of the present invention, it is easy with a small number of members. Can be constructed.

[Fillability test]
Next, under the conditions shown in Table 1, air vent holes were made in the projections of the ventilation waterproof sheet, the lath net was fixed via the reinforcing material of FIG. 3, and mortar was applied. After the mortar was cured, the ventilation preventive sheet was peeled off, and the portions where 90% or more of the mortar was filled in the protrusions of the ventilation sheet were expressed as a percentage. The number of holes is one each.

上表１より明らかなように、突起部底面にφ１１ｍｍ以上の穴を設けることにより、モルタルは突起部内に完全に充填され、突起部側面にφ２〜５ｍｍの穴１つでは、若干の空隙が生じていた。そこで、突起部側面では、穴を２箇所に増やしたり、穴の大きさを７ｍｍ以上に大きくすることにより、１００％の充填を得ることができた。

As is clear from Table 1 above, by providing a hole with a diameter of 11 mm or more on the bottom surface of the protrusion, the mortar is completely filled in the protrusion, and a slight gap is generated with one hole of 2-5 mm on the side of the protrusion. It was. Therefore, on the side surface of the protrusion, 100% filling could be obtained by increasing the number of holes to two or increasing the size of the holes to 7 mm or more.

[Waterproof test]
Next, after applying and drying a water-stopping material on the indoor side of the projection of the ventilation waterproof sheet under the conditions shown in Table 2, linear 1. A ventilation waterproof sheet was attached with staples (“MAX Staple 719M” manufactured by MAX Co., Ltd.) via a 4 mm steel wire. The base plate to which the air permeable waterproof sheet was attached was tilted at an angle of 30 degrees, and colored water was poured between the air permeable waterproof sheet and the moisture permeable waterproof sheet conforming to JIS A6111, and it was observed whether the color water adhered to the base plate.

上表２より明らかなように、止水材を塗布する事により、漏水を防水することができることが確認された。安価なメチルセルロース水溶液でも適正量を塗布すれば十分な止水効果が得られた。特に高吸水性樹脂である逆相エマルジョン型メタクリル酸エステル系カチオンポリマーでは、僅かな塗布量で十分な止水効果が得られた。
これら止水材の使用に際しては、実験によりその種類、塗布量による止水効果を確認することが望ましい。

As apparent from Table 2 above, it was confirmed that water leakage can be waterproofed by applying a water-stopping material. Even with an inexpensive aqueous solution of methylcellulose, a sufficient water-stopping effect was obtained if an appropriate amount was applied. In particular, the reverse phase emulsion type methacrylic acid ester cationic polymer which is a highly water-absorbent resin has a sufficient water-stopping effect with a small coating amount.
When using these water-stopping materials, it is desirable to confirm the water-stopping effect depending on the type and amount applied by experiments.

[Execution test 1]
June 24, 2010 Ota-ku, Tokyo Wooden shaft construction 189m ² construction Resin waterproofing sheet 1 (mass 400g / m ² ) shown in Fig. 1 is projected on structural plywood (thickness 9.5mm) 3 3 is superposed so as to be covered by one row, and the lath fixing member 4 shown in FIG. 3 is fixed thereon with staples (“MAX Staple 719M” manufactured by MAX Co., Ltd.) 15 and lath nets (( Nikken Build Co., Ltd. “W Lath”) 12 is fixed along the lath fixing member 4 by tilting the claw 7 and light weight mortar (“Lasmol” manufactured by Fujikawa Construction Materials Co., Ltd.) 6 is applied. did.
In terms of workability, the workability was excellent, the mortar was filled in the protrusion, and the work surface did not rise. There was no deflection of the resin waterproof sheet 1, and a watering test was conducted, but no water leakage was confirmed. Condensation did not occur and high air permeability was confirmed. Moreover, although the time-dependent change after apply | coating and constructing lightweight mortar 6 was observed for one month, it was a favorable result without a crack.
In addition, as shown in Table 1 above, when the portion of the projection portion filled with 90% or more mortar was examined, it was 76%. Therefore, a hole of φ7 mm was provided on the side surface of the projection portion as an air vent hole. As a result, the portion where 90% or more of the mortar was filled in the protrusions was made 100%.
As a matter of course, the construction workability was good, the resin waterproof sheet 1 was not bent, internal condensation did not occur during the winter, and high air permeability was confirmed. In addition, even after observing a change with time of one month after the light weight mortar 6 was applied, it was a good result without cracks.
Furthermore, in a part of the construction area, observe the presence or absence of water leakage by using two water-stopping materials used in the water-stopping test (methylcellulose aqueous solution, reversed-phase emulsion-type methacrylic ester cationic polymer) in a predetermined amount. However, no significant difference was found at this stage.

[Test 2]
July 22, 2010 Saitama City, Saitama Prefecture Wooden 2-story frame construction 310m ² Construction Structural plywood (thickness 9.5mm) 3 on the resin waterproof sheet 1 (mass 400g / m ² ) shown in Figure 1 The protrusions 2 are superposed so as to be overlapped one by one, and a lath fixing member 4 shown in FIG. 3 is fixed thereon with staples (“MAX Staple 719M” manufactured by MAX Co., Ltd.) 15 to form a lath mesh. ("W Lass" manufactured by Nikken Build Co., Ltd.) 12 is fixed by tilting the claws 7 along the members 4 for fixing the laths, and a light weight mortar ("Rasmol" manufactured by Fujikawa Construction Materials Co., Ltd.) 6 is applied thereon. It was installed.
In terms of workability, the workability was excellent, the mortar was filled in the protrusion, and the work surface did not rise. There was no deflection of the resin waterproof sheet 1, and a watering test was conducted, but no water leakage was confirmed. Condensation did not occur and high air permeability was confirmed. Moreover, although the time-dependent change after apply | coating and constructing lightweight mortar 6 was observed for one month, it was a favorable result without a crack.
In addition, as shown in Table 1 above, when the portion of the projection portion filled with 90% or more mortar was examined, it was 76%. Therefore, a hole of φ7 mm was provided on the side surface of the projection portion as an air vent hole. As a result, the portion where 90% or more of the mortar was filled in the protrusions was made 100%.
As a matter of course, the construction workability was good, the resin waterproof sheet 1 was not bent, internal condensation did not occur during the winter, and high air permeability was confirmed. In addition, even after observing a change with time of one month after the light weight mortar 6 was applied, it was a good result without cracks.

[Test 3]
September 30, 2010 Toyonaka-shi, Osaka Wooden 2-story frame structure 220m ² construction Resin waterproofing sheet 1 (mass 400g / m ² ) shown in Fig. 1 on structural plywood (thickness 9.5mm) 3 3 is superposed so that the projections 2 are overlapped one by one, and a lath fixing member 4 shown in FIG. 3 is fixed thereon with staples (“Max Staple 719M” manufactured by MAX Co., Ltd.) 15. A net ("W Lath" manufactured by Nikken Build Co., Ltd.) 12 is placed on the lath fixing member 4 and the claws 7 are tilted and fixed, and a lightweight mortar ("Lasmol" manufactured by Fujikawa Construction Materials Co., Ltd.) 6 is placed thereon Painted and applied.
In terms of workability, the workability was excellent, the mortar was filled in the protrusion, and the work surface did not rise. There was no deflection of the resin waterproof sheet 1, and a watering test was conducted, but no water leakage was confirmed. Condensation did not occur and high air permeability was confirmed. Moreover, although the time-dependent change after apply | coating and constructing lightweight mortar 6 was observed for one month, it was a favorable result without a crack.
In addition, as shown in Table 1 above, when the portion of the projection portion filled with 90% or more mortar was examined, it was 76%. Therefore, a hole of φ7 mm was provided on the side surface of the projection portion as an air vent hole. As a result, the portion where 90% or more of the mortar was filled in the protrusions was made 100%.
As a matter of course, the construction workability was good, the resin waterproof sheet 1 was not bent, internal condensation did not occur during the winter, and high air permeability was confirmed. In addition, even after observing a change with time of one month after the light weight mortar 6 was applied, it was a good result without cracks.

[Comparison 1]
February 6, 2009 Naka-ku, Yokohama-shi Wooden one-storied frame 100m ² construction A plurality of minute protrusions on the surface of the commercially available plywood (thickness 9.5mm) instead of the resin waterproof sheet A tarpaulin ("FN Las" manufactured by Nichiras Co., Ltd.) is fastened with staples ("Max Staple 719M" manufactured by MAX Co., Ltd.), and a lightweight mortar (Fujikawa Construction Materials) is placed thereon. “Lasmol” manufactured by Kogyo Co., Ltd. was applied.
Although workability was good in terms of workability, it was difficult to say that there was internal condensation and high air permeability. Moreover, although the time-dependent change after apply | coating and constructing lightweight mortar was observed for one month, the crack had arisen, and when the outer wall was incised and investigated, the waterproof sheet was wrinkled. From this, it is considered that a difference occurred in the coating thickness of the mortar depending on the presence or absence of wrinkles, and cracks were generated.

[Comparison 2]
August 16, 2010 Akashi, Hyogo Pref. Wooden 2-story frame 200m ² construction Moisture permeable waterproof sheet (JIS A6111) is fixed on structural plywood (thickness 9.5mm) with a tacker needle, and the thickness is Fasten the 18mm vertical barrel edge and the anti-warp barrel edge, and fasten the ventilation lath ("Nicken ventilation lath" manufactured by Nikken Build Co., Ltd.) with staples ("MAX Staple 625TR-D" manufactured by MAX Co., Ltd.) Lightweight mortar ("Rusmor II" manufactured by Fujikawa Construction Materials Co., Ltd.) was applied on top.
The work of fixing each member and the material management of a large number of members are troublesome, and further, the construction period for constructing the walls of the building is prolonged. When applying mortar, lath deflection occurred, and the mortar application workability was poor. Moreover, although the time-dependent change after apply | coating and constructing lightweight mortar was observed for one month, it was a favorable result without a crack.

  By using a waterproof sheet for a ventilation method that also contributes as a waterproof layer of the outer wall of a building, it can be suitably used for (outer) ventilation insulation method.

1 Resin tarpaulin (breathable waterproof sheet)
2 Protrusions 3 Base 4, 4 ′ Net fixing member 5 Air layer 6 Mortar 7, 7 ′ Claw 8 Strut 9 Waterproof paper 10 Strut 11 Felt 12 Lath net 13 Shaft 14 Insulating material 15 Staple

Claims (6)

  A first step of attaching a resin waterproof sheet having a plurality of taper-shaped projections, on the top or side surfaces of which are provided with air vent holes, and filling the projections And a second step of applying mortar or concrete, and a method for constructing an outer wall comprising a ventilation layer.   After the first step of attaching a resin waterproof sheet having a plurality of tapered protrusions formed on the top or side surface thereof with air vent holes on the base, a mesh material is applied to the outer surface side. And a second step of applying mortar or concrete so as to be filled in the protruding portion after the step of fixing, and a method for constructing an outer wall including a ventilation layer.   A first step of fixing the top of the protrusion with a reinforcing member together with a reinforcing member when mounting a resin waterproof sheet having a plurality of tapered protrusions on the ground, and a mortar or so as to fill the protrusion And a second step of applying concrete, and a method for constructing an outer wall including a ventilation layer.   When the resin waterproof sheet having a plurality of tapered protrusions is attached on the base, after performing the first step of fixing the top part of the protrusions together with the reinforcing material with the fixture, the net member is fixed to the outer surface side. And a second step of applying mortar or concrete so as to be filled in the protrusions after the step. A method for constructing an outer wall including a ventilation layer.   The method for constructing an outer wall with a ventilation layer according to claim 1 or 2, wherein in the first step, the reinforcing material is fixed together with a fixture when the top of the projection is fixed to the ground.   The method for constructing an outer wall provided with the ventilation layer according to any one of claims 1 to 5, wherein the protrusion has a protrusion height of 13 to 18 mm.

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