JP2013049982A - Connection structure of mortar external wall and connection method of mortar external wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To substantially improve waterproofness on a cut surface of a mortar layer.SOLUTION: For a connection structure of a mortar external wall, an existing mortar layer 3 is cut and removed while leaving only a wall base 2, and a new mortar layer 4 is connected to a cut surface 3c of the cut and removed existing mortar layer 3. The new mortar layer 4 includes a waterproof tape 16, a waterproof sheet 17, a lath net 18, a sealant 19, an unshrinkable solidification material 20, and new mortar 21. Between the wall base 2 and the waterproof tape 16, a base plate 22 which is close to the side of the cut surface 3c of the existing mortar layer 3 at a side edge 22o on an existing side and covers a gap 8 of the wall base 2 is disposed.

Description

  The present invention relates to a mortar outer wall joining structure and a mortar outer wall joining method that can significantly improve waterproofness at a joint part of a mortar layer.

  In recent years, home renovation is generally performed with changes in the family structure and living environment. In this reform, for example, an existing outer wall is extended to increase the number of rooms. As an extending method when the existing outer wall is a mortar outer wall, for example, in Patent Document 1 below, a mortar outer wall joining structure and method have been proposed.

  This joining structure is a waterproof tape that is attached to a saw-like lath plate that is extended from a cut surface of an existing mortar layer and a plurality of long plate members are arranged with a gap, and the waterproof tape and the cut surface Sealing material for water-tightening the corner of the joint, non-shrinkable solidifying material for embedding the sealing material, waterproof sheet laminated on the waterproof tape, lath net laminated on the waterproof sheet, and new installation for embedding them Including mortar.

  In such a joining structure, the sealing material closes the gap between the waterproof tape and the cut surface, and the non-shrinkable solidifying material solidifies around the sealing material, thereby improving the waterproofness at the joining portion. It has been.

Japanese Patent No. 4222577

  However, in the joining structure as described above, since the waterproof tape is intermittently supported by the saw-shaped lath plate, when a sealing material is stacked on the waterproof tape at the corner and pressed with a spatula or the like, the waterproof tape is waterproof. As the tape digs into the gap between the lath plates, the sealing material sometimes protrudes from the gap, resulting in a problem that the waterproofness at the joint portion is lowered.

  The present invention has been devised in view of the actual situation as described above, and the side edge on the existing side is close to the cut surface side of the existing mortar layer between the wall base and the waterproof tape, and the wall base The main object is to provide a mortar outer wall joining structure and a mortar outer wall joining method capable of greatly improving the waterproofness at the joint of the mortar layer on the basis of providing a base plate covering the gap.

  Among the present inventions, the invention according to claim 1 is a wall-like wall base in which a plurality of long plate members are arranged with a gap, and an existing installation provided on the outside of the wall base through an existing waterproof sheet. The existing mortar layer composed of an existing mortar layer including the mortar is cut and removed from the existing mortar layer leaving only the wall base, and a new mortar layer is formed on the cut surface of the cut and removed existing mortar layer. The mortar outer wall is connected to each other, and the new mortar layer is formed on the outer side of the wall base exposed from the cut surface of the existing mortar layer, and the side edge on the existing side of the existing mortar layer. Waterproof tape disposed in the vicinity of the cut surface, disposed at least partially laminated with the waterproof tape, and a newly installed waterproof sheet disposed outside the wall base, on the outside of the newly installed waterproof sheet New arranged A lathe net, a sealing material that seals water between at least the existing side edge of the waterproof tape and the cut surface at a corner between the cut surface and the wall base of the existing mortar layer, and the corner A non-shrinkable solidifying material covering the sealing material at a portion, and the wall base, the waterproof tape, the new waterproof sheet, and the new lath net outside the non-shrinkable solidified material A base that covers the gap between the wall base and the side edge on the existing side close to the cut surface side of the existing mortar layer. A plate is arranged.

  Moreover, invention of Claim 2 is a joining structure of the mortar outer wall of Claim 1 with which the side edge of the said existing side of the said base plate is inserted between the said existing waterproof sheet and the said wall base. .

  The invention according to claim 3 is the outer wall joining structure according to claim 1 or 2, wherein the base plate is made of resin or metal.

  Further, the invention according to claim 4 is a slatted wall base in which a plurality of long plate members are arranged with a gap between them, and an existing mortar arranged on the outside of the wall base via an existing waterproof sheet. Cut and remove the existing mortar layer on the existing mortar outer wall consisting of the existing mortar layer containing only the wall base, and connect the new mortar layer to the cut surface of the cut and removed existing mortar layer A mortar outer wall joining method, wherein the base plate is exposed to the outside of the wall base exposed from the cut surface of the existing mortar layer, and the side edge of the existing side is on the cut surface side of the existing mortar layer. A base plate placement step for reinforcing the wall base by covering the gaps of the wall base by arranging them close to each other, bringing the side edge on the existing side close to the cut surface of the existing mortar layer on the outside of the base plate And A waterproof tape placement step of arranging a water tape, a waterproof sheet placement step of arranging a new waterproof sheet on the outside of the wall base so as to be laminated at least partially with the waterproof tape, and a new outside of the new waterproof sheet A lath net disposing step of arranging a lath net, sealing at least between a side edge on the existing side of the waterproof tape and the cut surface at a corner of the cut surface of the existing mortar layer and the wall base A sealing material arranging step of arranging a material and watertight; a non-shrinking solidifying material arranging step of arranging a non-shrinkable solidifying material so as to cover the sealing material at the corners; and on the outside of the non-shrinking solidifying material The method further comprises a mortar arrangement step of applying the new mortar so as to cover the wall base, the waterproof tape, the new waterproof sheet, and the new lath net.

  Further, the invention according to claim 5 is the invention according to claim 4, wherein the base plate arranging step includes a step of inserting an existing side edge of the base plate between the existing waterproof sheet and the wall base. This is a joining method of the outer wall of the mortar.

  The joint structure of the outer wall of the mortar according to the present invention includes a saw-like wall base in which a plurality of long plate members are arranged with a gap therebetween, and an existing mortar arranged on the outside of the wall base via an existing waterproof sheet Cut and remove the existing mortar layer from the existing mortar outer wall consisting of the existing mortar layer containing only the wall base, and connect the new mortar layer to the cut surface of the cut and removed existing mortar layer. Yes.

  In addition, the newly installed mortar layer has a waterproof tape, a waterproof tape, and an outer side of the wall base exposed from the cut surface of the existing mortar layer, and the side edge on the existing side is arranged close to the cut surface of the existing mortar layer. A new waterproof sheet placed outside the wall base, a new lath net placed outside the new waterproof sheet, and a cut surface of the existing mortar layer and the wall base. A sealing material that at least seals between the side edge of the existing waterproof tape and the cut surface, a non-shrinkable solidifying material that covers the sealing material at the corner, and a non-shrinkable solidifying material. On the outside, it includes a new mortar covering the wall substrate, waterproof tape, a new waterproof sheet, and a new lath net.

  In such a new mortar layer, the sealing material can reliably close the gap between the waterproof tape and the cut surface, and the non-shrinkable solidifying material can be solidified around the sealing material, so the waterproof property at the cut surface Can be improved without fail.

  Further, a base plate is disposed between the wall base and the waterproof tape so that the side edge on the existing side is close to the cut surface side of the existing mortar layer and covers the gap of the wall base.

  Since such a base plate can support the waterproof sheet by covering the gap of the wall base, even if the sealing material is pressed with a spatula or the like, the waterproof sheet is prevented from sinking into the gap of the wall base, and consequently the sealing material. Can be prevented from protruding from the gap. According to the joint structure of the mortar outer wall of the present invention, the waterproof property at the joint part of the mortar layer can be improved.

It is a perspective view which shows the joining structure of the mortar outer wall of this embodiment. It is AA sectional drawing of FIG. It is sectional drawing which shows the joining structure of the mortar outer wall of other embodiment. (A) is sectional drawing explaining the base plate arrangement | positioning process, (b) is sectional drawing explaining the base plate arrangement | positioning process of other embodiment. (A) is sectional drawing explaining a waterproof tape arrangement | positioning process, (b) is sectional drawing explaining a waterproof sheet arrangement | positioning process, (c) is sectional drawing explaining a lath net arrangement | positioning process. (A) is sectional drawing explaining a sealing material arrangement | positioning process, (b) is sectional drawing explaining a non-shrinkable solidification material arrangement | positioning process, (c) is sectional drawing explaining a mortar arrangement | positioning process.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the joint structure of the mortar outer wall 1 of the present embodiment (hereinafter, simply referred to as “joint structure”) is an extension of the existing mortar outer wall 1 o in home renovation or the like, Used when enlarging, reducing, or deleting an opening.

  Specifically, the existing mortar layer 3 is cut and removed from the existing mortar outer wall 1o including the wall base 2 and the existing mortar layer 3 arranged outside the wall base 2, leaving only the wall base 2. The newly formed mortar layer 4 is connected to the cut surface (hereinafter simply referred to as “cut surface”) 3c of the existing mortar layer 3 that has been cut and removed.

  The wall base 2 is composed of, for example, trunk edges 7, 7 that are spaced apart from each other on the left and right sides and extend vertically, and a plurality of long plate members 6 that are fixed to the trunk edges 7. And the board | plate material 6 is formed in the shape of a slat by arrange | positioning the clearance gap 8 in the up-down direction, for example. The length L1 of the gap 8 is set to about 20 mm or less, for example. Moreover, although the board | plate material 6 employ | adopts woods, such as a cedar, for example, it may consist of a plywood, a synthetic resin, or a metal.

  As shown in FIGS. 1 and 2, the existing mortar layer 3 includes an existing waterproof sheet 11 disposed outside the wall base 2, and an existing lath net disposed outside the existing waterproof sheet 11. 12, and an existing mortar 13 disposed on the outside of the wall base 2 via an existing waterproof sheet 11 and a lath net 12.

  The existing waterproof sheet 11 is continuously arranged on the outside of the wall base 2 in the vertical and horizontal directions. Such an existing waterproof sheet 11 can prevent rainwater or the like soaked from the existing mortar 13 from entering the wall base 2 side. In addition, asphalt felt etc. are suitably employ | adopted for this existing waterproof sheet 11, for example.

  The existing lath net 12 is disposed along the outside of the existing waterproof sheet 11 and is clamped by, for example, staples. Such an existing lath net 12 holds the existing mortar 13 and prevents the existing mortar 13 from peeling off. The existing lath net 12 employs, for example, a flat lath or a waveform lath.

  The existing mortar 13 is disposed outside the wall base 2 so as to cover the existing waterproof sheet 11 and the existing lath net 12. For this existing mortar 13, for example, a pre-mixed lightweight cement mortar, sand cement mortar, sand cement mortar, or mortar lysine scraping off is appropriately employed.

  The new mortar layer 4 includes a waterproof tape 16 disposed on the outside of the wall base 2 exposed from the cut surface 3c, a new waterproof sheet 17 disposed at least partially on the waterproof tape 16, A new lath net 18 disposed on the outside of the new waterproof sheet 17, a sealing material 19 disposed in a corner C between the cut surface 3 c and the wall base 2, and a non-shrinkable solidifying material covering the sealing material 19 20 and a new mortar 21 disposed on the outside of the non-shrinkable solidifying material 20.

  The waterproof tape 16 is arranged such that the existing side edge 16o is close to the cut surface 3c. Such a waterproof tape 16 can prevent rainwater or the like soaked from the newly installed mortar 21 from entering the wall base 2 side. In addition, the waterproof tape 16 has a width W3 set to, for example, about 50 to 100 mm, and for example, a waterproof adhesive tape for house waterproofing or an asphalt felt with an adhesive is appropriately employed.

  The newly provided waterproof sheet 17 is disposed so as to at least partially overlap the waterproof tape 16 and cover the outside of the wall base 2. Such a new waterproof sheet 17 can prevent rainwater from entering the wall base 2 over a wide area from the waterproof tape 16 to the new installation side, thereby improving the waterproof property. Although the new waterproof sheet 17 is not particularly limited, it is preferable to use a roofing material having a higher performance than the existing waterproof sheet 11 and having a performance higher than that of the asphalt roofing felt 430, a moisture-permeable waterproof sheet, and the like.

  The new lath net 18 is disposed outside the new waterproof sheet 17 and is fixed with staples or the like. The new lath net 18 of the present embodiment is not particularly limited, but a metal lath such as a corrugated lath that is easily entangled with a mortar, a deformed lath such as a rib lath, or a composite lath such as a reinforced lath is desirable.

  Further, it is desirable that the existing side edge 18 o of the lath net 18 is covered with the non-shrinkable solidifying material 20. Thereby, the lath net 18 can prevent the side edge 18o from being peeled off from the wall base 2 due to drying shrinkage of the newly-installed mortar 21, and the durability can be improved.

  The sealing material 19 is disposed in the corner C so as to cover at least the side edge 16 o on the existing side of the waterproof tape 16. Such a sealing material 19 can close the gap between the side edge 16o of the waterproof tape 16 and the cut surface 3c to be watertight, and can greatly improve the waterproofness at the joint.

  Further, the sealing material 19 of the present embodiment is arranged so as to cover the existing side edge 17o of the newly installed waterproof sheet 17, and can further improve the waterproof property. As the sealing material 19, for example, a building sealing material, an asphalt sealing, or a polymer cement sealing is appropriately employed.

  The non-shrinkable solidifying material 20 is disposed so as to cover the outside of the sealing material 19 at the corner C. Such a non-shrinkable solidifying material 20 can prevent the sealing material 19 from being peeled off or damaged due to the drying shrinkage of the newly installed mortar 21. As the non-shrinkable solidifying material 20, for example, resin mortar or the like is appropriately employed.

  The new mortar 21 covers the wall base 2, the waterproof tape 16, the new waterproof sheet 17, and the new lath net 18 outside the non-shrinkable solidifying material 20. Although this new mortar 21 is not particularly limited, for example, an already prepared light weight mortar is desirable.

  By the way, in order to arrange the sealing material 19 in the gap between the side edge 16o on the existing side of the waterproof tape 16 and the cut surface 3c to ensure watertightness, the sealing material 19 is placed on the corner C. After that, it is pressed against the wall base 2 side with a spatula or the like. Due to the pressing of the sealing material 19, in the conventional joining structure, the waterproof tape 16 is deformed so as to sink into the gap 8 of the wall base 2, and a part of the sealing material 19 protrudes from the gap 8 to the inside of the wall base 2. As a result, it was found that the waterproofness at the joint was lowered.

  Therefore, in the joining structure of the present embodiment, the base plate 22 that covers the gap 8 of the wall base 2 is disposed between the wall base 2 and the waterproof tape 16. The base plate 22 is arranged such that the existing side edge 22o is close to the new side of the cut surface 3c and covers the gap 8 of the wall base 2.

  Such a base plate 22 covers the gap 8 of the wall base 2 and can support the waterproof tape 16 continuously. Therefore, even if the sealing material 19 is pressed with a spatula or the like, the waterproof tape 16 is recessed into the gap 8. It is possible to prevent the sealing material 19 from protruding into the gap 8. Therefore, in the joint structure of this embodiment, the waterproofness of the joint can be greatly improved.

  Further, it is desirable that the side edge 22 n on the newly installed side of the base plate 22 is covered with the waterproof tape 16. Thereby, it can suppress that the waterproof sheet 17 is damaged by the edge formed in the side edge 22n of the base plate 22. FIG.

  In order to effectively exhibit the above action, the width W4 of the base plate 22 is preferably about 20 to 50% of the width W3 of the waterproof tape 16 and the thickness is about 0.2 to 1.5 mm.

  The base plate 22 is preferably made of a resin or metal having durability against moisture and alkalinity. In the case of resin, synthetic resin or the like is desirable, and in the case of metal, stainless steel or the like is desirable.

  In the present embodiment, the side edge 22o on the existing side of the base plate 22 is illustrated in proximity to the new side with respect to the cut surface 3c. However, the present invention is not limited to this. For example, as shown in FIG. 3, the existing side edge 22 o may be inserted between the existing waterproof sheet 11 and the wall base 2.

  Such a base plate 22 prevents a gap from being formed between the cut surface 3c and can support the waterproof tape 16 more stably. In order to effectively exhibit such an action, the shortest length L5 between the side edge 22o of the base plate 22 and the cut surface 3c is desirably about 5 to 10% of the width W4 of the base plate 22.

Next, an example of the joining method of the mortar outer wall of this embodiment is demonstrated.
In the joining method of the present embodiment, as shown in FIG. 1, the existing waterproof sheet 11, the existing lath net 12, and the existing mortar 13 are left on the existing mortar outer wall 1 o, leaving only the wall foundation 2. After cutting and removing a part of the existing mortar layer 3 including, a new mortar layer 4 is connected to the cut surface 3c.

  In this joining method, a base plate arranging step of arranging the base plate 22 outside the wall base 2 exposed from the cut surface 3c, a waterproof tape arranging step of arranging the waterproof tape 16 outside the base plate 22, and a wall A waterproof sheet arranging step of arranging a new waterproof sheet 17 outside the base 2, a lath net arranging step of arranging a new lath net 18 outside the new waterproof sheet 17, and a sealing material 19 at the corner C A sealing material arranging step for arranging the non-shrinkable solidifying material 20 in the corner C, and a mortar for applying the new mortar 21 outside the non-shrinking solidifying material 20 A placement step.

  In the base plate arranging step, as shown in FIG. 4A, the base plate 22 is straddled between the plate materials 6 and 6 (shown in FIG. 1) of the wall base 2 and the side edges on the existing side. 22o is fixed close to the cut surface 3c side. As a result, the base plate 22 can reinforce the wall base 2 by covering the gap 8 (shown in FIG. 1) of the wall base 2 in the vicinity of the cut surface 3 c, and waterproof tape disposed on the base plate 22. 16 (shown in FIG. 2) can be stably supported.

  Further, as shown in FIG. 4B, in this step, after the side edge 22o on the existing side of the base plate 22 is arranged on the new side of the cut surface 3c, the side edge 22o is placed on the existing waterproof sheet 11. And a step of inserting between the wall base 2 may be included. Thereby, the base plate 22 can prevent a gap from being formed between the base plate 22 and the cut surface 3c. The base plate 22 is inserted between the existing waterproof sheet 11 and the wall base 2 due to compression deformation of the existing waterproof sheet 11 or bending of the wall base 2.

  In the waterproof tape placement step, as shown in FIG. 5A, the waterproof tape 16 is attached along the outside of the base plate 22 with the existing side edge 16 o close to the cut surface 3 c. . Further, the protruding portion 16N of the waterproof tape 16 that protrudes from the base plate 22 to the new side is adhered to the wall base 2 so that a large gap is not formed between the base plate 22 and the side edge 22n on the new side.

  In the waterproof sheet arranging step, as shown in FIG. 5B, the newly installed waterproof sheet 17 is fixed to the outside of the wall base 2 so as to be laminated at least partially with the waterproof tape 16. In the present embodiment, the side edge 17o on the existing side of the waterproof sheet 17 is arranged so as to be displaced from the side edge 16o on the existing side of the waterproof tape 16 to the new side.

  In the lath net arranging step, as shown in FIG. 5C, the new lath net 18 is arranged outside the new waterproof sheet 17 and is fixed with staples or the like. Further, in order to securely hold the new mortar 21 (shown in FIG. 2) on the cut surface 3 c side, it is desirable that the new lath net 18 is laminated on at least a part of the base plate 22.

  In the sealing material arranging step, as shown in FIG. 6A, the sealing material 19 is disposed at least between the side edge 16o on the existing side of the waterproof tape 16 and the cut surface 3c at the corner C. And watertight.

  After the sealing material 19 is stacked at the corner C, the sealing material 19 is pressed against the waterproof tape 16 by a spatula or a trowel. Since the inner surface of the waterproof tape 16 is supported by the base plate 22, it is possible to effectively prevent the waterproof tape 16 from being inserted into the gap 8 (shown in FIG. 1) and the sealing material 19 from protruding. Waterproofness can be improved.

  In the non-shrinkable solidifying material arranging step, as shown in FIG. 6B, after the sealing material 19 is applied, the non-shrinkable solidifying material 20 is covered with the sealing material 19 at the corners C. Arrange as follows. In the present embodiment, the non-shrinkable solidifying material 20 is disposed so as to cover the existing side edge 18 o of the lath net 18.

  In the mortar arrangement step, as shown in FIG. 6 (c), after the non-shrinkable solidifying material 20 is applied, the wall base 2, the waterproof tape 16 and the new installation are provided outside the non-shrinkable solidifying material 20. A new mortar 21 is applied so as to cover the waterproof sheet 17 and the new lath net 18. And after this newly installed mortar 21 hardens | cures, the joining structure of the mortar outer wall of this invention is formed.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

2 Wall base 3 Existing mortar layer 4 New mortar layer 16 Waterproof tape 17 Waterproof sheet 18 Lath net 19 Sealing material 20 Non-shrinkable solidification material 21 New mortar 22 Base plate

Claims (5)

An existing mortar layer including a slat-like wall base in which a plurality of long plate members are arranged with a gap, and an existing mortar arranged on the outside of the wall base via an existing waterproof sheet A mortar outer wall joining structure in which the existing mortar layer is cut and removed on the outer wall of the mortar, leaving only the wall base, and a new mortar layer is connected to the cut surface of the cut and removed existing mortar layer. ,
The new mortar layer is a waterproof tape in which the side edge on the existing side is arranged close to the cut surface of the existing mortar layer on the outside of the wall base exposed from the cut surface of the existing mortar layer,
The waterproof tape is disposed at least partially with the waterproof tape, and a new waterproof sheet disposed on the outside of the wall base,
A new lath net arranged outside the new tarpaulin,
A sealing material that seals water between at least the existing side edge of the waterproof tape and the cut surface at the corner of the cut surface of the existing mortar layer and the wall base,
A non-shrinkable solidifying material that covers the sealing material at the corners; and on the outside of the non-shrinkable solidifying material, the wall substrate, the waterproof tape, the new waterproof sheet, and the new lath net. Including new mortar covering
Between the wall base and the waterproof tape, an existing side plate is disposed close to the cut surface side of the existing mortar layer, and a base plate that covers the gap of the wall base is disposed. A characteristic mortar outer wall joint structure.   2. The mortar outer wall joining structure according to claim 1, wherein a side edge on the existing side of the base plate is inserted between the existing waterproof sheet and the wall base.   The outer wall joining structure according to claim 1, wherein the base plate is made of resin or metal. An existing mortar layer including a slat-like wall base in which a plurality of long plate members are arranged with a gap, and an existing mortar arranged on the outside of the wall base via an existing waterproof sheet A mortar outer wall is a method of joining a mortar outer wall by cutting and removing the existing mortar layer leaving only the wall foundation, and connecting a new mortar layer to the cut surface of the existing mortar layer that has been cut and removed,
By placing the ground plate on the outside of the wall foundation exposed from the cut surface of the existing mortar layer, with the side edge on the existing side being close to the cut surface side of the existing mortar layer, the wall foundation A base plate arranging step for reinforcing the wall base covering the gap of
A waterproof tape arrangement step of arranging a waterproof tape on the outside of the base plate, with the side edge on the existing side being close to the cut surface of the existing mortar layer,
A waterproof sheet arrangement step of arranging a new waterproof sheet on the outside of the wall base so as to be laminated at least partially with the waterproof tape;
A lath net arrangement step of arranging a new lath net on the outside of the new waterproof sheet;
Sealing material arrangement step of arranging a sealing material between at least the existing side edge of the waterproof tape and the cutting surface at a corner between the cut surface of the existing mortar layer and the wall base and sealing the water. ,
A non-shrinkable solidifying material arrangement step of arranging a non-shrinkable solidifying material so as to cover the sealing material at the corners;
A mortar arrangement step of applying the new mortar so as to cover the wall base, the waterproof tape, the new waterproof sheet, and the new lath net outside the non-shrinkable solidifying material; Mortar outer wall joining method characterized by the above   The mortar outer wall joining method according to claim 4, wherein the base plate arranging step includes a step of inserting an existing side edge of the base plate between the existing waterproof sheet and the wall base.

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