JP2016223229A - Waterproof piece and waterproof structure and waterproof construction method using waterproof piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof structure and a waterproof construction method, which have sufficient waterproof performance even if a rising wall height of a skeleton is low.SOLUTION: A waterproof structure comprises: a horizontal part, which is connected to a horizontal wall at an internal corner made up of the base horizontal wall installed on a skeleton and a rising wall that continuously rises up from the horizontal wall; a rising part that is connected to the rising wall; and a visible part that enables visual check of a connection state of at least the rising part. A waterproof piece to be connected to the internal corner is used.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a waterproof structure and a waterproof construction method in a corner portion between a horizontal wall and a rising wall of a frame on a veranda, a balcony, a flat roof, and the like.

  Conventionally, when waterproofing a frame on a veranda, balcony, flat roof, etc. with a waterproof sheet, the waterproof sheet is raised from the horizontal wall to the parapet part of the frame or the part having a rising wall such as under the sash that becomes the entrance to the room. A method is used in which the end of the waterproof sheet is bonded to the rising frame along the ceiling and fixed by sealing, or a method in which a synthetic resin-coated steel plate is attached to the rising wall and the waterproof sheet is fused to the rising wall.

  In Patent Document 1, a waterproof sheet laid on a veranda floor as a construction method under a window frame sash of a veranda is raised along a mortar wall below the window frame sash, and a waterproof sheet formed on the outer surface of the mortar wall. An exterior construction method under a sash is disclosed in which an upper end edge of a waterproof sheet is inserted into a mounting groove, and a putty is filled and fixed in the sheet mounting groove.

Japanese Patent Laid-Open No. 6-2448779

  On the other hand, there are buildings where the steps near the entrance / exit between the veranda or balcony and the interior are made smaller to reduce the risk of falls due to the steps when entering and exiting.

In such a building, the height of the rising wall of the frame from the horizontal wall is very low, and when installing a waterproof sheet on such a frame, the height of the rising wall is not sufficient by the method described above Therefore, there is a problem that it is difficult to work. In particular, in the repair work of the waterproof sheet, the members such as sashes and drainers already installed are obstructed, and the work is difficult. Therefore, even if waterproofing is applied, there is a risk that the waterproof property of the rising wall portion will be insufficient. Usually, in order to determine whether or not the waterproof sheet is sufficiently bonded, a bonded state is confirmed by placing a thin bar or the like on the edge of the waterproof sheet, but such a confirmation operation is also impossible.
Therefore, the present invention solves the above-described problems, and an object of the present invention is to provide a waterproof structure and a waterproof construction method that have sufficient waterproof performance even in a groundwork having a rising wall where construction work of the waterproof sheet is difficult. .

  The gist of the present invention is to use a waterproof piece that includes a horizontal portion and a rising portion that rises continuously from the horizontal portion, and is provided with a visual recognition portion for confirming the joined state.

Specifically, a horizontal portion joined to the horizontal wall at a corner formed by a horizontal wall of a base provided on the casing and a rising wall continuously rising from the horizontal wall, and joined to the rising wall The waterproof piece is provided with a rising portion to be formed and a visual recognition portion capable of visually confirming at least a joining state of the rising portion, and is joined to the corner.
Further, the visual recognition part is a through hole, the visual recognition part is the transparent or translucent rising part, or the visual recognition part is an adhesive material joined to at least an edge part of the back surface of the rising part.

  In addition, a horizontal portion joined to the horizontal wall joined to the corner formed by a base horizontal wall provided on the housing and a rising wall continuously rising from the horizontal wall, and joined to the rising wall Waterproof structure of the entrance corner provided with a waterproof piece provided with a rising portion to be formed and a visual recognition portion capable of visually confirming at least a joining state of the rise portion, and a bonding agent for joining the waterproof piece and the entrance corner. Furthermore, it is a waterproof structure in which the bonding state of the waterproof piece can be confirmed by allowing the bonding agent to be visually observed by the visual recognition unit.

Further, a waterproof construction method for a base having a corner formed by a horizontal wall and a rising wall continuously rising from the horizontal wall, the horizontal portion bonded to the horizontal wall, and the bonding to the rising wall A joining step of joining a waterproof piece provided with a rising portion and at least a visual recognition portion capable of visually confirming a joining state of the rising portion to a corner through a bonding agent, and the visual recognition portion of the waterproof piece It is a construction method provided with the confirmation process which confirms the joining state of the said rising part and the said rising wall at least.
In addition, the visual recognition part is a through hole, and in the confirmation step, the joining state is confirmed by protruding the bonding agent from the through hole, or the visual recognition part is the transparent or translucent rising part. The confirmation method is a construction method for confirming the joining state by the spread state of the adhesive visible from above the waterproof piece, or the adhesion of the visual recognition part to at least the edge part of the back surface of the rising part. It is a construction method in which the joining state is confirmed by protruding the adhesive material from the end of the waterproof piece in the confirmation step.

  According to the present invention, when the waterproof piece is attached to the corner formed by the horizontal wall and the rising wall continuously rising from the horizontal wall, the joining state can be visually confirmed. Even when the height is low, sufficient waterproof performance can be obtained without insufficient bonding.

It is sectional drawing of the waterproof structure of this invention. It is a fragmentary perspective view which shows the example of the waterproof piece of this invention. It is a fragmentary perspective view which shows the example of the cover material of this invention. It is sectional drawing of the waterproof structure of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the present invention is not limited to these embodiments.

  The waterproof piece of the present invention is a member having a substantially L-shaped cross section, which is composed of a plate-like rising portion 1-2 as well as a plate-like horizontal portion 1-1 as shown in FIG. FIG. 1 shows a floor structure near the bottom of a sash, which is an entrance / exit of a veranda, and shows a waterproof structure using the waterproof piece of the present invention. The outline is that a waterproof piece 1 is joined by a bonding agent 2 to a corner G3 formed by a horizontal wall G1 of a base G which is a casing and a rising wall G2 rising continuously from the horizontal wall G1. The horizontal portion 1-1 of the waterproof piece 1 is joined to the horizontal wall G1, and the rising portion 1-2 of the waterproof piece 1 is joined to the rising wall G2 by the bonding agent 2. A waterproof sheet 4 is laid on the horizontal wall G1 which is a floor surface of the veranda, is extended to above the horizontal portion 1-1 of the waterproof piece 1, and is bonded and fixed by an adhesive (not shown).

  The waterproof piece 1 is a member having a substantially L-shaped cross section, which is composed of a flat plate-like rising portion 1-2 as well as a flat plate-like horizontal portion 1-1. The waterproof piece 1 is provided with a visual recognition portion 3 that can visually confirm at least the joining state between the rising portion and the base during construction.

  FIG. 2 shows a specific example of the waterproof piece 1. The waterproof pieces 1a and 1b are formed by using a through hole 3a provided in the waterproof piece 1 as a visual recognition part 3. The waterproof piece 1a is provided with a through hole 3a only in the rising portion 1-2, and the waterproof piece 1b is provided with a through hole 3a in both the horizontal portion 1-1 and the rising portion 1-2. The size and number of the through holes 3a can be set as appropriate, but preferably the diameter of the holes is about 1 mm to 10 mm, and the perforation rate is about 10% to 50%. The shape of the through-hole 3a is not limited to a circle, and can be selected as appropriate, such as a square or a triangle. The positions where the through holes 3a are provided may be provided in the whole rising part 1-2, like the waterproof pieces 1a and 1b, or in the whole horizontal part 1-1 and the rising part 1-2, and the end of the rising part 1-2. You may provide in an edge part or the edge part of the horizontal part 1-1 and the rising part 1-2.

  When constructing the waterproof piece 1a or 1b, after applying the bonding agent 2 such as an adhesive to the base G, the waterproof piece 1a or 1b is crimped to the corner G3 formed by the horizontal wall G1 and the rising wall G2, The joining state can be confirmed by the degree of protrusion of the bonding agent 2 from the through-hole 3a. That is, the bonding agent 2 from the through hole 3a does not protrude or slightly protrudes from the through hole 3a when the bonding piece 1 is insufficiently bonded to the base G. Since the amount of protrusion increases, the joining state can be determined. Further, when the bonding agent 2 enters the through hole 3a, the bonding strength is improved by the anchor effect.

  The waterproof pieces 1c and 1d in FIG. 2 are obtained by using the transparent main body 3b of the transparent or translucent waterproof piece 1 as the visual recognition unit 3. The waterproof piece 1c has only the rising portion 1-2 as the transparent main body portion 3b, and the waterproof piece 1d has the entire transparent main body portion 3b. Although there is no restriction | limiting in particular about the transparency of the transparent main-body part 3b, When it overlaps with the foundation | substrate G, the grade which can visually recognize the surface state of the foundation | substrate G is preferable. When applying the waterproof piece 1c or 1d, after applying the bonding agent 2 such as an adhesive to the base G, the waterproof piece 1c or 1d is crimped to the corner G3 formed by the horizontal wall G1 and the rising wall G2, The joining state can be confirmed by looking at the spread state (spreading spread) of the bonding agent 2 that can be visually recognized from above the transparent or translucent waterproofing piece 1c or 1d.

The waterproof pieces 1e and 1f in FIG. 2 are obtained by using the adhesive material 3c bonded to at least the edge portion of the back surface of the rising portion 1-2 of the waterproof piece 1 as the visual recognition portion 3. The waterproof piece 1e has an adhesive material 3c bonded to the entire back surface of the rising portion 1-2, and the waterproof piece 1f has an adhesive material 3c bonded to the edge of the back surface of the rising portion 1-2. Here, the adhesion position of the adhesive material 3c is such that the end of the adhesive material 3c enters inside the end of the back surface of the rising portion 1-2, and as close as possible to the end of the back surface of the rising portion 1-2. The adhesive material 3c is preferably bonded so that there is an end portion. In addition, the adhesive material 3c can be provided not only on the back surface of the rising portion 1-2 but also on the back surface of the horizontal portion 1-1.
When the waterproof piece 1e or 1f is applied, the waterproof piece 1e or 1f may be applied from the top after applying the bonding agent 2 such as an adhesive to the base G, and the adhesive material 3c is joined. You may affix on the corner G3 as the agent 2 as it is. The waterproof piece 1e or 1f is pressure-bonded in accordance with the entrance corner G3 composed of the horizontal wall G1 and the rising wall G2, and the joining state can be confirmed by the protruding state of the adhesive material 3c from the end of the waterproof piece 1 at that time. Become.

  The adhesive material 3c used for the waterproof piece 1e or 1f is preferably one having moderate elasticity, and various solid sealing materials and adhesive rubber are preferably used. Butyl rubber is particularly preferably used because of its high waterproofness.

  The waterproof piece 1 is preferably made of a flexible material such as synthetic resin or rubber because of its good adhesion to the waterproof base. When the material is the same as that of the waterproof sheet 4 that covers the horizontal wall A1 such as the veranda floor, the joining property of the joint between the waterproof piece 1 and the waterproof sheet 4 is preferable. Further, in order to improve the strength of the waterproof piece 1, a substrate such as a glass cloth or a polyester cloth can be laminated.

  In the waterproof structure of FIG. 1, the cover member 5 is arranged so as to cover the surface of the rising portion 1-2 of the waterproof piece 1. The cover material 5 can be used to compensate for the waterproofness, weather resistance, bondability with the waterproof sheet 4 and the like of the waterproof piece 1. For example, since the waterproof piece 1a, 1b in FIG. 2 is provided with the through hole 3a as the visual recognition part 3, the waterproof piece 1a or 1b is covered with the cover material 5 so as to cover and close the through hole 3a. To do.

  FIG. 3 shows a specific example of the cover material 5. The cover material 5a is formed by forming a plurality of protrusions p on a flat plate, and the protrusions p are provided so as to correspond to the through holes 3a of the waterproof piece 1a of FIG. The waterproofness is improved by bonding and fixing the cover material 5a onto the waterproof piece 1a so that the projections p of the cover material 5a are respectively fitted in the through holes 3a. 3 is a plate-like cover material 5 having an L-shaped cross section, and a plurality of similar projections p are provided on the outer surface of the L-shape, and the projections p are waterproof pieces 1b shown in FIG. Corresponds to the through hole 3a. In addition to fixing the cover material 5b on the waterproof piece 1b by fitting the projections p of the cover material 5b to the through holes 3a, the waterproof property is improved, and the surface of the horizontal portion 1-1 of the waterproof piece 1b. Is covered with the cover material 5b and becomes smooth, and welding and welding are easy at the joint portion with the waterproof sheet 4 covering the floor surface.

  Further, the cover material 5 may be a flat plate having no projection p or a plate-like body having an L-shaped cross section, such as 5c and 5d in FIG. The cover materials 5c and 5d are colored with a pigment or the like like a normal waterproof sheet, and have high concealability. For example, the weather resistance is improved by overlaying and fixing the cover material 5c on the rising portion 1-2 that is the transparent main body 3b of the waterproof piece 1c. The cover material 5d is suitably used for the waterproof piece 1d having the entire transparent body portion 3b. These cover members 5 can be used not only for the waterproof pieces 1c and 1d in FIG. 2, but also for the waterproof pieces 1a and 1b.

  Next, the waterproof structure will be described. The waterproof structure of the present invention includes a waterproof piece 1 provided with a visual recognition part capable of visually confirming at least the joining state of the rising part as described above, and a rising wall that rises continuously from the horizontal wall. It is characterized in that it is joined to the formed corner with a bonding agent, and further, in the bonding step to the corner of the waterproof piece 1, the bonding agent can be seen from the visual recognition part of the waterproof piece 1, so that the waterproof piece 1 is joined. Can be confirmed.

A specific example of the waterproof structure will be described with reference to FIGS.
FIG. 1 shows the floor structure near the sash at the entrance and exit of the veranda, which is a waterproof structure using the waterproof piece of the present invention. The height of the rising wall G2 of the base G from the horizontal wall G1 is about 100 mm. A corner G3 formed by a horizontal wall G1 of the base G and a rising wall G2 rising continuously from the horizontal wall G1 has the same shape as the waterproof piece 1a of FIG. 2 and is formed of a polyvinyl chloride resin. The waterproof piece 1a 'is bonded with a vinyl adhesive 2a as the bonding agent 2, the horizontal portion 1-1 of the waterproof piece 1a' is bonded to the horizontal wall G1, and the rising portion 1-2 of the waterproof piece 1a 'is bonded. Is bonded to the rising wall G2. A polyvinyl chloride waterproof sheet 4a is laid on the horizontal wall G1 which is the floor of the veranda, and is fixed by an adhesive (not shown). The edge of the waterproof sheet 4a is the horizontal portion 1- of the waterproof piece 1a '. 1 is extended to 1 and joined by liquid welding with a solvent.

  The cover piece 5a ', which has the same shape as the cover piece 5a in FIG. 3 and is formed of polyvinyl chloride resin, is superimposed on the rising part 1-2 of the waterproof piece 1a', and the rising part 1- of the waterproof piece 1a ' The two through holes 3a and the projections p of the cover piece 5a 'are bonded and fixed with an adhesive (not shown). The end of the rising portion 1-2 of the waterproof piece 1a 'and the upper end of the cover piece 5a' are end-treated with a modified silicone sealant 6 ', and the lower end of the cover piece 5a' is waterproof. The end portion of the waterproof sheet 4a overlaid on the horizontal portion 1-1 of the piece 1a 'is end-treated with a vinyl-based sealing material 7'.

  FIG. 4 is also a floor structure near the sash at the entrance and exit of the veranda, and is a modified waterproof structure using the waterproof piece of the present invention. The existing waterproof sheet 8 is laid and fixed from the horizontal wall of the frame to the corner and the rising wall. The casing on which the existing waterproof sheet 8 is laid is a base G ', and a corner formed by a horizontal wall G'1 of the base G' and a rising wall G'2 rising continuously from the horizontal wall G'1. A waterproof piece 1b ′ formed of a polyvinyl chloride resin having the same shape as the waterproof piece 1b of FIG. 2 is bonded to G′3 with a modified silicone adhesive 2b as a bonding agent 2, and the waterproof piece 1b The horizontal part 1-1 ′ is bonded to the horizontal wall G′1, and the rising part 1-2 of the waterproof piece 1a ′ is bonded to the rising wall G′2.

  A cover piece 5b 'which is a plate material having an L-shaped cross section similar to the cover piece 5b of FIG. 3 and formed of a polyvinyl chloride resin, overlapping the horizontal portion 1-1 and the rising portion 1-2 of the waterproof piece 1b'. However, the horizontal portion 1-1 and the rising portion 1-2 of the waterproof piece 1b 'are bonded and fixed with an adhesive (not shown) so that the through-hole 3a of the rising portion 1-2 and the protrusion p of the cover piece 5b' are fitted. Yes. The end of the rising portion 1-2 of the waterproof piece 1b ′, the upper end of the cover piece 5b ′, and the end of the existing waterproof sheet 8 are end-treated with a modified silicone sealing material 6 ′. A new polyvinyl chloride waterproof sheet 4b is laid on the horizontal wall G'1 which is the floor of the veranda, and is fixed by an adhesive (not shown), and the edge of the waterproof sheet 4b is horizontal to the waterproof piece 1b '. It extends to the top of the cover piece 5b 'superimposed on the part 1-1, and is joined by liquid welding with a solvent. The end portion of the waterproof sheet 4b overlaid on the cover piece 5b 'is end-treated with a vinyl-based sealing material 7'.

  Next, the waterproof construction method will be described. The waterproof construction method of the present invention is a waterproof construction method in a ground having a corner formed by a horizontal wall and a rising wall that rises continuously from the horizontal wall. The waterproof piece 1 is inserted through a bonding agent. It is a construction method comprising a joining step for joining to a corner and a confirmation step for confirming at least the joining state of the rising portion of the waterproof piece 1 and the rising wall of the base by the visual recognition portion of the waterproof piece 1.

A specific example of the waterproof construction method will be described by taking the waterproof structure of FIGS. 1 and 4 as an example.
In the case of the waterproof structure of FIG. 1, first, a vinyl-based adhesive that is a bonding agent 2 as a whole is formed at a corner G3 formed by a horizontal wall G1 of the base G and a rising wall G2 rising continuously from the horizontal wall G1. Agent 2a is applied. A waterproof piece 1a ′ having the same shape as that of the waterproof piece 1a of FIG. 2 and formed of a polyvinyl chloride resin is inserted into the corner G3 to which the vinyl adhesive 2a is applied. 1 is crimped and joined to the horizontal wall G1 so that the rising portion 1-2 of the waterproof piece 1a 'overlaps the rising wall G2. At this time, by observing the state of the vinyl adhesive 2a from the through hole 3a which is the visual recognition part 3 of the rising part 1-2 of the waterproof piece 1a ', the rising part 1-2 of the waterproof piece 1a' and the rising of the base G The joining state with the wall G2 is confirmed. If the vinyl adhesive 2a applied to the rising wall G2 is in the through hole 3a, it can be seen that the pressure bonding is sufficient and the joining state is good, and the vinyl adhesive 2a is opposite to the through hole 3a. When it is in a state where it does not enter 3a, it is understood that the pressure bonding is insufficient and the bonding state is poor. A plurality of through-holes 3a are provided in the rising portion 1-2 of the waterproof piece 1a ′, and if the vinyl-based adhesive 2a is in all of these through-holes 3a, they are uniformly crimped and joined. This is preferable. When there is a portion where the vinyl-based adhesive 2a does not enter the through-hole 3a, the vinyl-based adhesive 2a enters the through-hole 3a by, for example, re-bonding the waterproof piece 1a 'around it to the base. To.

  After joining the waterproof piece 1 to the entrance corner G3, the cover material 5 is laid and fixed on the waterproof piece 1 as necessary. In the case of FIG. 1, an adhesive ( The cover piece 5a 'having the same shape as that of the cover piece 5a of FIG. 3 and formed of a polyvinyl chloride resin is applied to the through hole 3a of the rising portion 1-2 of the waterproof piece 1a' and the cover piece 5a '. The piece 5a ′ is pressure-bonded so as to be fitted to the protrusion p, and is bonded and fixed. Then, an adhesive is applied to a portion other than the portion where the waterproof piece 1a 'of the horizontal wall G1 is laid, and a polyvinyl chloride waterproof sheet 4a is laid and fixed by adhesion. The edge portion of the waterproof sheet 4a is overlaid on the horizontal portion 1-1 of the waterproof piece 1a ', and a solvent is applied to the overlap margin to apply the solvent to the overlap margin and the horizontal portion 1-1 of the waterproof piece 1a'. And weld. Finally, a modified silicone sealing material 6 'is applied to the end of the rising portion 1-2 of the waterproof piece 1a' and the upper end of the cover piece 5a 'as an end treatment, and the lower end of the cover piece 5a' A vinyl-based sealing material 7 ′ is applied to the end of the waterproof sheet 4 a that is overlaid on the horizontal part 1-1 of the waterproof piece 1 a ′.

  In the case of the waterproof structure of FIG. 4, the existing waterproof sheet 8 (base G ′) in which the existing waterproof sheet 8 is laid on the casing, and the rising wall G that rises continuously from the horizontal wall G ′ 1. The modified silicone adhesive 2b as the bonding agent 2 is applied to the corner G′3 formed by “2”. The waterproof piece 1b 'having the same shape as the waterproof piece 1b of FIG. 2 and formed of a vinyl chloride resin is used. The horizontal portion 1-1 of the waterproof piece 1b' is placed on the horizontal wall G'1, and the waterproof piece 1b 'is raised. The part 1-2 is crimped and joined so as to overlap the rising wall G′2. At this time, by observing the state of the modified silicone adhesive 2b from the through hole 3a which is the visual recognition part 3 provided in the horizontal part 1-1 and the rising part 1-2 of the waterproof piece 1b ', the waterproof piece 1b' The joining state of the horizontal part 1-1 and the rising part 1-2 and the horizontal wall G'1 and the rising wall G'2 of the base G 'is confirmed. If the modified silicone adhesive 2b applied to the horizontal wall G'1 and the rising wall G'2 is in the through-hole 3a, it can be seen that the crimping is sufficient and the joining state is good. When the modified silicone-based adhesive 2b does not enter the through hole 3a, the pressure bonding is insufficient and the bonding state is poor. A plurality of through-holes 3a are provided in the horizontal portion 1-1 and the rising portion 1-2 of the waterproof piece 1b '. If the modified silicone-based adhesive 2b enters all the through-holes 3a, the through-hole 3a is uniform. It is preferable because it is crimped to.

  Subsequently, an adhesive (not shown) is applied to the horizontal portion 1-1 and the rising portion 1-2 of the waterproof piece 1b ', and then has the same shape as the cover piece 5b of FIG. 3 and is formed of a polyvinyl chloride resin. The cover piece 5b 'is pressure-bonded and bonded and fixed so that the horizontal part 1-1 of the waterproof piece 1b' and the through hole 3a of the rising part 1-2 and the projection p of the cover piece 5b 'are fitted. Then, an adhesive is applied to a portion other than the portion where the waterproof piece 1b 'of the horizontal wall G'1 of the existing waterproof sheet 8 is laid, and a new polyvinyl chloride waterproof sheet 4b is laid and fixed by adhesion. The edge of the new polyvinyl chloride waterproof sheet 4b is overlaid on the cover piece 5b 'which is bonded to the horizontal part 1-1 of the waterproof piece 1b', and a solvent is applied to the overlap margin to apply the waterproof sheet 4b. The edge portion and the cover piece 5b ′ are welded. Finally, as an end treatment, a modified silicone sealant 6 'is applied to the end of the rising portion 1-2 of the waterproof piece 1b' and the upper end of the cover piece 5b ', and is overlaid on the cover piece 5b'. Further, a vinyl sealant 7 'is applied to the end of the new polyvinyl chloride waterproof sheet 4b.

  According to the waterproof piece of the present invention, the waterproof structure using the same, and the waterproof construction method, when the waterproof piece is attached to the corner formed by the horizontal wall and the rising wall continuously rising from the horizontal wall, the joined state Can be confirmed visually, and sufficient waterproof performance can be obtained without inadequate joining, so waterproof construction such as under a sash of a veranda where the height of the rising wall is low and the work space is narrow or its repair work It is suitable for.

DESCRIPTION OF SYMBOLS 1 Waterproof piece 1-1 Horizontal part 1-2 Rising part 2 Bonding agent 3 Visual recognition part 3a Through-hole 3b Transparent main body part 3c Adhesive material 4 Waterproof sheet 5 Cover material 6 Sealing material 7 Seal material 8 Existing waterproof sheet G, G 'foundation G1, G'1 Horizontal wall G2, G'2 Rising wall G3, G'3 Corner

Claims (10)

  A horizontal portion joined to the horizontal wall at the corner formed by a horizontal wall of the foundation provided in the housing and a rising wall continuously rising from the horizontal wall; and a rising portion joined to the rising wall; A waterproof piece that is provided with at least a visual recognition part capable of visually confirming a joining state of the rising part and joined to the corner.   The waterproof piece according to claim 1, wherein the visual recognition portion is a through hole.   The waterproof piece according to claim 1, wherein the visual recognition part is the rising part that is transparent or translucent.   The waterproof piece according to claim 1, wherein the visual recognition portion is an adhesive material bonded to at least an edge portion of the back surface of the rising portion.   The waterproof piece according to claim 1, the waterproof piece, and the corner that are joined to a corner formed by a horizontal wall of a base provided on the housing and a rising wall that rises continuously from the horizontal wall. The waterproof structure of the said corner provided with the joining agent to join.   The waterproof structure according to claim 5, wherein the bonding state of the waterproof piece can be confirmed by allowing the bonding agent to be visually observed by the visual recognition unit.   A waterproof construction method for a base having a corner formed by a horizontal wall and a rising wall continuously rising from the horizontal wall, the horizontal portion bonded to the horizontal wall, and bonded to the rising wall A joining step of joining a waterproof piece having a rising portion and a visual recognition portion capable of visually confirming a joining state of at least the rising portion to a corner through a bonding agent; and at least the visual recognition portion of the waterproof piece by the visual recognition portion A construction method comprising a confirmation step of confirming a joining state between a rising portion and the rising wall.   The construction method according to claim 7, wherein the visual recognition part is a through-hole, and the joining state is confirmed by protrusion of the bonding agent from the through-hole in the confirmation step.   The construction method according to claim 7, wherein the visual recognition portion is the transparent or translucent rising portion, and the joining state is confirmed by an extended state of the adhesive visible from above the waterproof piece in the confirmation step.   The said visual recognition part is the adhesive material adhere | attached on the at least edge part of the back surface of the said rising part, The joining state is confirmed by the protrusion of the adhesive material from the edge part of the said waterproof piece in the said confirmation process. Construction method.

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