JP5683821B2 - Siding waterproof structure - Google Patents

Description

  The present invention relates to a siding structure used as a building exterior material, and more particularly to a waterproof siding structure.

  Siding is a plate-like exterior material stretched on the outer wall, and is generally manufactured at the factory, and many are known to have excellent fire resistance and durability. In recent years, the number of types has increased, and there are sidings such as cement (ceramics), ceramic, metal, and resin. It is often used as an outer wall of a house (especially a wooden house) because it has abundant designs such as color patterns, is relatively inexpensive and easy to construct. Since siding is durable and lightweight, it is also frequently used for renovating outer walls.

  FIG. 3 illustrates a general arrangement structure of siding. Reference numeral 1 denotes a pillar (or a stud), 2 denotes a moisture-permeable waterproof sheet, 3 denotes a trunk edge (vertical trunk edge), and 4 denotes a siding (siding material). In the siding 4, the left and right sidings 4 are juxtaposed and fixed using the trunk edge 3, and a filler (caulking material) 5 is disposed at the joint (joint) to waterproof the joint.

  In order to improve the waterproof performance of the joint portion, as shown in FIG. 4, a backup material 6 is arranged on the trunk edge 3, a projection 7 is provided in the center of the backup material 6, and the projection 7 is inserted into the joint portion. A technique for improving the waterproof performance of joints by arranging them so as to be known is also known (Patent Document 1).

JP 2006-283446 A

  The problem is the intrusion of rain and snow water due to aging. This is because the intrusion into the rain and snow water causes corrosion of the wooden frame (column material or wooden base). Especially in recent highly airtight houses, the indoor temperature is kept relatively high, so that the temperature of rain and snow water entering the interior tends to be high, and the corrosion of the wooden frame tends to be further promoted.

  Rain and snow water intrusion occurs for a variety of reasons. First, the filler (5) filling the joints of the siding (4) is easily deteriorated by the ultraviolet rays contained in the sun rays, and is repeatedly contracted and expanded due to the temperature difference of the outside temperature. Since it is thinner than the state, a gap is created in the joint and gradually spreads.

Secondly, the siding (4) repeats expansion and contraction due to the difference in the outside air temperature or the difference between the room temperature and the outside air temperature. Since the siding (4) is fixed to the body edge (3) by fixing at a fixed point such as nailing, there are not a few cases where deformation occurs by repeated expansion and contraction. When the siding (4) is deformed or misaligned, there is a problem with the filler (5) of the joint, and a gap is formed in the joint and rain and snow water enters inside.

  The rain / snow water that has entered inside from the joints of the siding (4) reaches the trunk edge (3), spreads around to the left and right, and reaches the moisture-permeable waterproof sheet 2. The moisture permeable waterproof sheet 2 is for preventing rain and snow water from entering, but in actual construction, a nail for fixing the siding (4) penetrates the trunk edge (3) and the moisture permeable waterproof sheet. It is not uncommon for 2 to have holes. For this reason, the rain / snow water that has entered the inside penetrates from the hole of the moisture-permeable waterproof sheet 2 to the back, that is, the pillar (1).

  When rain / snow water enters the pillar (1) in this manner, the rain / snow water flows down and reaches the foundation, so that the pillar (1) itself and the foundation are exposed to the rain / snow water. Since recent wooden houses are airtight, the indoor temperature is kept high even in winter, so the temperature of rain and snow water that has entered the interior is also kept high, and the pillar (1) and foundation are wooden. If this is the case, it will corrode in a few years.

  Depending on the exterior renovation that improves the appearance, even if the joints are refilled and refilled cleanly, the corroded pillar (1) and foundation hazard (such as earthquake resistance) cannot be improved.

  Therefore, an object of the present invention is to prevent rain and snow water that has entered from the joints of the siding from reaching the pillar (1) and the foundation.

  In order to achieve the above object and to solve the problems, the waterproof structure of the siding according to the present invention is a plate-like elastic resin material fixed to the outer side surface of the trunk edge (outdoor side surface; the same applies hereinafter) on the joint side of the siding. The elastic resin material includes a plurality of drainage grooves extending in the vertical direction on the outer surface thereof (claim 1).

  If there is no backup material (6) as disclosed in Patent Document 1, the plate-like elastic resin material has a lateral width that can waterproof the entire surface of the outer side of the trunk edge or the ingress of rain and snow water on the back side of the joint. Provide in a range that has In order to prevent intrusion of rain and snow water, it is not always necessary to cover the entire outer surface of the trunk edge.

  On the other hand, when there is a backup material (6) as disclosed in Patent Document 1, it can be provided on both sides of the backup material (6) in a state of covering both left and right ends of the outer surface of the trunk edge. If it is possible to remove the backup material (6) from the viewpoint of construction cost and work efficiency, remove the backup material (6), and then rain or snow water on the entire outer surface of the trunk edge or on the back side of the joint An elastic resin material is provided in a range having a lateral width that can waterproof the intrusion portion. In this case, the backup material (6) may be removed or may be reattached (refixed).

  The thickness (average thickness) of the elastic resin material may be approximately 1 to 5 mm (claim 2). The thickness of the elastic resin material is determined in consideration of the material, strength, temperature difference, etc. of the elastic material to be used. For the purpose of preventing rain / snow / water, it is preferable that the average thickness of the elastic resin material is thin in terms of raw material costs, but in order to guarantee the strength to withstand severe temperature differences, it should not be excessively thick. It is also important to have a slight wall thickness inside.

  The drainage ditch provided in the elastic resin material may have a width of 0.5 to 10 mm and a depth of 0.5 to 10 mm.

  The elastic resin material receives rain and snow water that has entered the back side of the joint, and flows downward using the drainage ditch. Accordingly, the left and right widths of the concave portion (drain groove) formed in the elastic resin material and the convex portion are not necessarily the same. However, if the width of the drainage ditch is too narrow, rain and snow water cannot be guided down effectively, so the drainage ditch is designed to have a width of about 0.5 to 10 mm and a depth of about 0.5 to 10 mm. It is desirable. The convex portions on the left and right sides of the drainage ditch are not directly involved if attention is paid to the function of draining rain and snow water, but from the viewpoint of guaranteeing the strength of the elastic resin material and preventing deterioration, the same as the drainage ditch. It is preferable to set the horizontal width of about or more, that is, for example, 0.5 to 10 mm.

  The waterproof structure for siding according to the present invention includes a plate-like elastic resin material fixed to the outer side surface (outdoor side surface) of the trunk edge on the joint side of the siding, and the elastic resin material has an outer side surface (outside side surface). In addition, since a plurality of drainage grooves extending in the vertical direction are provided, rain and snow water that has entered the interior from the joint is prevented from entering further into the interior by this elastic resin material.

  Even if there is a small hole in the elastic resin material due to a metal fitting (for example, a nail) for fixing the siding, the small hole will be in close contact with the metal fitting due to the expansion characteristics of the elastic resin material. Is not formed. In addition, since there are a plurality of drainage grooves extending in the vertical direction on the outer surface of the elastic resin material, the rain and snow water that has entered the interior from the joints hit the elastic resin material, and then follow the drainage grooves. It flows down and is discharged outdoors. The situation where rain and snow water intrudes into the depth of the moisture permeable waterproof sheet 2 can be surely avoided. As a result, it is possible to reliably prevent rain and snow water that has entered from the joints of the siding to reach the pillar (1) and the base.

It is a perspective view which shows the waterproof structure example of the siding which concerns on embodiment. It is a top view which shows the waterproof structure example of the siding which concerns on embodiment. It is a perspective view which shows the example of the waterproof structure of the conventional siding. It is a top view which shows the example of the waterproof structure of the conventional siding.

  1 to 2 show an embodiment of a waterproof structure for siding according to the present invention. In this waterproof structure, a moisture-permeable waterproof sheet 12 is disposed on the outer side surface (outdoor side surface) of the pillar (or inter-column) 10, and a trunk edge (vertical trunk edge) is provided on the outer side surface (outdoor side surface) of the moisture-permeable waterproof sheet 12. 13 is fixed, and a plate-like elastic resin material 20 that covers the entire outer surface (outside surface) of the trunk edge 13 (the entire surface) is disposed.

  Then, a seam (a seam in the left-right direction) of a siding (siding material) 14 that is an exterior material is positioned at a substantially central portion of the outer surface of the elastic resin material 20, and a filler (coking material; For example, mortar) 25 is disposed. When the siding 14 is fixed, the upper and lower edges are overlapped and fixed, so that no gap is generated. The point that the moisture-permeable waterproof sheet 12 is disposed on the outer side surface of the pillar (or the inter-column) 10 and the trunk edge 13 is fixed to the outer side surface of the moisture-permeable waterproof sheet 12 is the same as the conventional waterproof structure for siding.

  The elastic resin material 20 used in the present embodiment is plate-shaped, that is, has a substantially uniform thickness. In order to fix the siding 14 to the outer side surface (outdoor side surface) of the elastic resin material 20, the convex portion 21 on the outer side surface of the elastic resin material 20 is formed so as to form a substantially smooth surface.

  The plurality of drainage grooves 22 formed on the outer side surface (outdoor side surface) of the elastic resin material 20 extend in the vertical direction. This is because rain and snow water that has entered the inside flows downward and is discharged to the outside. It is desirable that the bottom surface (inside side surface) of the drainage ditch 22 is formed with a flat bottom surface and a smooth side surface without forming protrusions or obstacles that prevent drainage.

  The drainage ditch 22 is substantially linear in the vertical direction, and is preferably provided in parallel so that a plurality of the drainage grooves 22 are arranged in the horizontal direction. The arrangement intervals are not necessarily equal.

  Since the drain ditch 22 only needs to have a function of causing rain and snow water to flow downward, it does not necessarily have to be linear. It may be a concave groove that draws a curved curve. However, when used in a cold region where there is a risk of rain and snow water freezing, the drainage ditch 22 is substantially linear in the vertical direction so that the rain and snow water flows downward as quickly as possible and is discharged outdoors. It is desirable to mold so as to exhibit.

  The plurality of drain grooves 22 are provided in parallel because the convex portions 21 of the elastic resin material 20 serve to support the back surface (inner side surface; indoor side surface) of the siding 14. It is preferable to disperse and arrange the convex portions 21 and the drainage grooves 22 so that the plurality of convex portions 21 of the elastic resin material 20 exist and the back surface of the siding 14 can be evenly supported. Because.

  From the viewpoint of guaranteeing the fluidity of water, the drainage ditch 22 can withstand practical use if designed to have a width of about 0.5 to 10 mm and a depth of about 0.5 to 10 mm. Since the amount of rain / snow water that passes through the joint filler 25 and enters the interior is very small, the drain groove 22 has a width of about 0.5 mm and a depth of about 0.5 mm. Also works. This is because a very small amount of water is unlikely to cause a flow obstruction due to the surface tension of water. As long as the width and depth of the drainage ditch 22 are set larger, no problem arises in terms of drainage function. That is, even if the width and depth of the drainage ditch 22 exceed 5 mm (for example, 5 to 10 mm), there is no problem in terms of drainage function. However, since the right and left dimensions of the trunk edge 13 on the back of the joint are limited, it is desirable that the width and depth of the drainage ditch 22 be designed so as to function efficiently within the limited dimensions.

  The elastic resin material 20 may be either natural rubber or synthetic rubber. Any elastic material (so-called elastic rubber) having an organic polymer as a main component may be used. All of these have the property of blocking water. In addition, it has a restoring force that closes the gap (small hole) around the nail created by nailing when nailing for fixing. Synthetic rubber includes polybutadiene, nitrile, and chloroprene, and any of them may be used.

  The elastic resin material 20 only needs to be thick enough to withstand aging due to temperature differences. For example, when the depth of the drain groove 22 is α1 and the thickness of the bottom surface of the drain groove 22 is α2, the thickness (average thickness) of the elastic resin material 20 is (α1 + α2) / 2. The minimum value of the average thickness of the elastic resin material 20 is preferably 1 mm or more in consideration of prevention of deterioration due to temperature difference. The thickness average is, for example, 30 mm or less in consideration of manufacturing cost, transportation cost, and construction cost. Preferably it is 20 mm or less, More preferably, it is 10 mm or less, More preferably, you may be 5 mm or less. In practical use, it may be 5 mm or less, and in a normal construction, it has a performance that can withstand practical use at about 5 mm. For example, when the average thickness is 5 mm, the thickness of the convex portion 21 is about 10 mm, and the depth of the drain recess 22 can be freely set within a range of about 3 to 8 mm, for example.

  Therefore, according to the waterproof structure of the siding, the plate-like elastic resin material 20 that covers the outer surface of the trunk edge 13 is provided, and the drainage grooves 22 are provided on the outer surface of the elastic resin material 20. The rain / snow water that has entered the interior from 25) is prevented from entering further into the interior by the elastic resin material 20, and flows down downward along the drainage ditch 22 and is discharged to the outside. Therefore, it is possible to reliably prevent rain and snow from entering the depth of the moisture permeable waterproof sheet 12.

  The waterproof structure for siding according to the present invention can be applied to both new construction work and renovation work.

  The waterproof structure for siding according to the present invention is not limited to that of the above embodiment. For example, in the case of renovation work, there is a case where a backup material (6) as disclosed in Patent Document 1 is present on the trunk edge 13, and the backup material (6) due to various circumstances such as construction period and construction cost. If it is difficult to remove, the plate-like elastic resin material 20 that covers the outer surface of the trunk edge 13 may be provided on both the left and right sides of the backup material (6). Even if the elastic resin material 20 having the drainage grooves 22 is provided on the left and right portions of the backup material (6), the rain and snow water that has entered the joint can be discharged to the outside. If it is possible to remove the backup material (6), after removing the backup material (6), an elastic resin material 20 (including a drainage ditch 22) covering the entire outer surface of the trunk edge 13 is provided. Is desirable.

  The elastic resin material 20 including the drain groove 22 extends in the vertical direction along the outer surface of the trunk edge 13. In this case, the left and right dimensions of the elastic resin material 20 do not need to be completely matched with the left and right dimensions of the trunk edge 13. This is because it is only necessary to prevent intrusion of rain and snow water. Therefore, the left-right dimension of the elastic resin material 20 may be slightly smaller than the left-right dimension of the trunk edge 13 or may be slightly larger. No hole (through hole) is formed in the elastic resin material 20. This is to reliably block the intrusion of rain and snow water.

  After the elastic resin material 20 is disposed, various coating materials (for example, a resin-based or mortar-based waterproof coating material) may be provided on the outer surface of the elastic resin material 20. It is more effective if the coating material is applied (intensively) around a portion (fixing point) where a fixing fitting such as a nail is provided after the elastic resin material 20 is fixed by nailing. In addition, it is desirable to apply a filler 25 to the joints in order to improve waterproofness and improve appearance.

10 pillars (or studs)
12 Breathable waterproof sheet 13 Trunk edge (vertical trunk edge)
14 Siding (siding material)
20 Elastic resin material 21 Convex part 22 Drainage ditch 25 Filler (coking material of joint)

Claims (3)

Equipped with a plate-like elastic resin material fixed to the outer side of the trunk edge on the joint side of the siding,
This elastic resin material
Covering the entire outer surface of the torso,
A plurality of drainage grooves extending in the vertical direction are provided in parallel on the outer surface of the elastic resin material ,
A waterproof structure for siding, characterized in that the convex portions constituting the drainage ditch are formed so as to form a substantially smooth surface .   The waterproof structure for a siding according to claim 1, wherein the thickness of the elastic resin material is approximately 1 to 5 mm.   The drainage ditch provided in the elastic resin material has a width of 0.5 to 10 mm and a depth of 0.5 to 10 mm, and the waterproof structure for siding according to any one of claims 1 and 2 .

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