JP2009228417A - Heat-insulating waterproofing construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-insulating waterproofing construction method excelling in appearance causing no level difference of a heat insulating layer to appear on the surface of a waterproof sheet even when there is unevenness on backing because of using polystyrene foam as a heat insulating material in the heat-insulating waterproofing construction method. <P>SOLUTION: The heat-insulating waterproofing construction method for installing the heat insulating layer 2 on the backing 1 and laying the waterproof sheet 3 thereon, uses polystyrene foam as the material of the heat insulating layer 2, arranges a plurality of heat insulating layers 2 side by side, and interposes a slope member 4 between the heat insulating layers 2 and the waterproof sheet 3 so as to straddle the adjacent heat insulating layers 2 in the adjoining part of the heat insulating layers 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a heat insulating waterproofing method using a heat insulating layer made of polystyrene foam in a waterproof structure such as a building, and is laid on an uneven ground and having a step between a plurality of heat insulating layers. The present invention relates to a heat-insulating waterproofing method that can prevent a level difference from appearing on the surface of a waterproof sheet.

  A foam sheet is laid as a heat insulation layer outdoors, especially in roofs, and there are soft sheets such as polyethylene and hard sheets such as polystyrene and polyurethane (Patent Literature). 1).

  Conventionally, when a foamed sheet is a hard sheet by a heat-insulating waterproofing method using such a waterproof sheet and lamination, warpage occurs due to heat (sunlight), leading to problems such as poor appearance and, in some cases, sheet peeling. For this reason, only soft sheets were used. However, since the soft sheet has flexibility, it is not suitable for a usage form such as walking on a waterproof sheet, and it is difficult to use or enough when joining a waterproof sheet laminated on it with an adhesive or the like. However, there were various problems such as failure to roll the sheet and insufficient heat insulation performance.

  In addition, when using an adhesive to bond the waterproof sheet and the heat insulating material, it is necessary to use a material that is resistant to solvent so as not to be attacked by the solvent contained in the adhesive. When joining, it was necessary to use a material that was not easily melted or deformed by the heat.

  These problems can be solved by using rigid urethane foam, but the sheet made of urethane foam with excellent heat insulation performance is easily hydrolyzed and deteriorates due to moisture during use. There is a problem that the performance is greatly lowered, and there is a problem that the price is higher than other materials and the cost is disadvantageous.

  On the other hand, although a sheet made of polystyrene foam has the merit that the heat insulation performance is relatively low and relatively inexpensive, it is eroded by an organic solvent. Therefore, as shown in FIG. A method of physically fixing to the base 1 using the disk plate 10 and the anchor 11 without using an adhesive has been adopted. Even in joining of the waterproof sheets 3 laid and arranged on them, they are joined by heat fusion without using an adhesive.

  However, in the case of polystyrene foam, the material itself has a relatively low melting point of about 80 ° C., and for example, when hot air is used for joining the waterproof sheet, the temperature of the hot air is 200 ° C. or more, and the temperature of the waterproof sheet itself at the joint is The temperature rises to 80 ° C or higher, and may be heated directly by hot air that has entered through the gap between the joints, causing problems that the polystyrene foam used as the heat insulation layer melts or softens and deforms. did.

  Patent Document 1 relates to a heat insulating waterproof panel that also serves as a mold for forming a concrete heat storage tank in a building or the like. When a waterproof sheet laminated on the surface of a resin foam heat insulating material is bonded by heat fusion, the heat insulating material is used. It is disclosed that by laminating fiber reinforced inorganic plates so as not to melt, a structure in which hot air does not reach the heat insulating material when heat-sealing the waterproof sheet, preventing deformation or shrinkage of the heat insulating material, etc. .

Japanese Patent Laid-Open No. 11-236994

  Patent Document 1 is a laminate in which a fiber reinforced inorganic plate is interposed between a resin foam heat insulating material and a waterproof sheet, and the heat and resin deformation of the resin foam heat insulating material is blocked by shielding the heat at the time of joining the waterproof sheet with the fiber reinforced inorganic plate. Can be prevented.

  Usually, the heat insulating layer to be laid on the base is used by preparing a large number of heat insulating layers suitable for the area of the base and laying them down so that there is no gap, but the base is often uneven. Polystyrene foam has the advantage of high thermal insulation performance compared to polyethylene foam, polyurethane foam, etc., but it is relatively hard, and when multiple thermal insulation layers are placed on an uneven surface, There is a step between them. If there is a step between the heat insulating layers arranged on the base, there is a problem that when a waterproof sheet is laid thereon, a step between adjacent heat insulating layers appears on the surface of the waterproof sheet.

  Therefore, in the present invention, even when polystyrene foam is used as a heat insulating material in the heat insulating waterproofing method and there is unevenness in the ground, the step of the heat insulating layer does not appear on the surface of the waterproof sheet and the appearance is good. The purpose is to provide a thermal insulation waterproofing method.

  In order to achieve the above object, in claim 1 of the present invention, in a heat insulating waterproofing method in which a heat insulating layer is installed on a base and a waterproof sheet is laid thereon, polystyrene foam is used as a material of the heat insulating layer. In addition, a plurality of heat insulation layers are arranged side by side, and a slope member arranged so as to straddle the adjacent heat insulation layers is interposed between the heat insulation layers and the waterproof sheet in adjacent portions of the heat insulation layers. It is characterized by becoming.

  According to a second aspect of the present invention, the slope member has adhesive portions at both ends with the non-adhesive portion at the center portion in the width direction sandwiched between them, and is fixed to the heat-insulating layer on each side by the adhesive portion. The heat insulating waterproofing method according to claim 1, wherein the heat insulating waterproofing method is arranged at a boundary between the matching heat insulating layers.

  In Claim 3, the slope member is the heat insulation waterproofing method of Claims 1-2 which has the initial yield point strength of 30-150 N / cm.

  According to a fourth aspect of the present invention, the slope member includes a tape material and an adhesive layer laminated on both ends of the tape material.

  In Claim 5, it is set as the heat insulation waterproofing method of Claims 1-4 which provides the hole penetrated up and down in a slope member.

  In claim 1, at the boundary between adjacent heat insulating layers arranged on the ground, a non-adhesive slope member is disposed so as to straddle the adjacent heat insulating layers, and the waterproof sheet is laid, and due to unevenness of the ground Even if there is a step between adjacent heat insulation layers, the step can be leveled with the slope member, and the surface of the waterproof sheet laid on it can be prevented from generating a step, and the appearance is good It can be made.

  According to a second aspect of the present invention, the slope member has an adhesive portion at both ends sandwiching the non-adhesive portion at the central portion in the width direction, and the non-adhesive portion is disposed at the boundary of the heat insulating layer and the tape material is thermally insulated by the adhesive portion. Since it is fixed to the layer, the displacement of the slope member hardly occurs, and the workability of the work of laying the waterproof sheet can be improved.

  In claim 3, the initial yield point strength of the slope member is limited to a predetermined range, and the step is formed on the surface of the waterproof sheet without fulfilling the role of the slope member due to being too soft and along the step shape. In addition, there is no problem that the rigidity is too high and the workability at the time of pasting is deteriorated or the meandering portion is lifted.

  In claim 4, the slope member has a configuration in which adhesive layers are disposed at both ends of the tape material, and the workability of laying the waterproof sheet can be simplified without causing the displacement of the slope member as in the case of claim 2. Can be good.

  In Claim 5, since the hole which penetrates up and down is provided as a tape material which comprises a slope member, for example, the vapor | steam etc. which generate | occur | produced from the base | substrate pass between heat insulation materials and enter into the space below a slope member. Even if there is, it can exhaust through the said through-hole, and it can prevent that a swelling arises.

  Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a waterproof sheet laid in a place where a heat insulating layer which is a characteristic part is adjacent to each other in the heat insulating waterproofing method of the present invention. A waterproof sheet 3 is laid on a base 1 made of concrete, such as a rooftop of a building, with a heat insulating layer 2 made of polystyrene foam interposed therebetween.

  The heat insulating layer 2 is fixed to the base 1, but is fixed mechanically by hitting a fixing disk 10 against the surface of the heat insulating layer 2 and driving the anchor member 11 into the base 1. It is laid.

  The waterproof sheet 3 can be used by connecting a plurality of sheets originally having a width of about 1 to 2 m in the width direction and bringing in a wide sheet of about 5 to 10 m, for example. There may be many places where the waterproof sheets need to be connected to each other, and they are used by joining them on site according to the site area.

  In the present invention, polystyrene foam is used as the heat insulating layer 2, and a plurality of heat insulating layers 2 are arranged side by side in accordance with the area of the base. Usually, the rooftop of a building is not completely flat, there is some unevenness, and a step is inevitably formed at the boundary of the heat insulating layers 2 arranged side by side. In the case of polystyrene foam, since it is harder than polyethylene foam, it cannot be absorbed and the level difference tends to be larger. If the waterproof sheet 3 is arranged from above with the level difference being large, the level difference appears on the surface of the waterproof sheet 3 and the appearance is impaired, and there is a risk that the waterproof sheet 3 is broken.

  Therefore, in the present invention, the sheet-like slope member 4 is disposed so as to straddle the adjacent heat insulating layers 2, and the step portion is changed to an inclined surface so that no step appears on the surface of the waterproof sheet 3. Yes. By doing so, the appearance of the waterproof sheet is also improved, and the waterproof sheet 3 can be prevented from being damaged such as breaking.

  The slope member 4 is a sheet-like member disposed on the boundary 2a of the adjacent heat insulating layers 2 and is in the form of a tape and is disposed along the boundary 2a. Although it is preferable from the standpoint of appearance and workability to arrange all the boundaries 2a without interruption, they may be arranged by appropriately thinning them out. Moreover, since the slope member 4 cannot play the role which eliminates a level | step difference if it is a flexible thing along the level | step difference of the heat insulation layer 2, what has a certain amount of initial yield strength is preferable, 30 ~ A material in the range of 150 N / cm, more preferably in the range of 60-100 N / cm is used.

  The slope portion 4 located in the center in the width direction of the slope member 4 arranged across the adjacent heat insulating layers 2 and the vicinity located at the boundary 2a is left as non-adhesive, and the both sides of the non-adhesive portion 4a are sandwiched as adhesive portions 4b. It is preferable to adhere and fix the member 4 to the heat insulating layer 2. For the adhesive portion 4b, for example, a method of arranging an adhesive material N as shown in FIG. In order to eliminate the step, the slope member 4 must be in a floating state without following the step, and it is better to fix the slope member 4 to the heat insulating layer 2 in order to prevent the slope member 4 from being displaced. . For this purpose, it is preferable that the central portion in the width direction of the slope member is kept non-adhesive as described above and both ends are adhesive portions.

  Specific examples of materials that can be used as the slope member 4 include materials such as nonwoven fabric, resin sheets such as polyethylene and polypropylene, and rubber sheets. When covering the boundary 2a of the heat insulating layer 2 with this slope member, the width of the portion forming the slope is preferably long in order to improve the appearance of the surface of the waterproof sheet 3, and has a width of about 5 to 20 mm. It is preferable to have. Further, in order to form a slope having a width of about 5 to 20 mm, the width of the non-adhesive portion of the slope member 4 is about 10 to 40 mm, and the adhesive portions at both ends are 3 in order to be firmly fixed to the heat insulating layer 2. Since about 10 mm is required, a total width of 30 to 60 mm is preferably used. In particular, the width of the slope to be formed becomes important in order to prevent the step of the heat insulating layer 2 adjacent to the surface of the waterproof sheet 3 that is the object of the present invention from being noticeable. If the slope width is less than 5 mm, the inclination angle becomes steep and the appearance is close to a step, and if it exceeds 20 mm, the width not in contact with the heat insulating layer 2 becomes longer. This leads to problems such as an increase in the number of bonded parts.

  Moreover, about the thickness, the thing of the range of 0.1-0.5 mm can be used suitably. The thinner the thickness, the better the appearance. However, if the thickness is less than 0.1 mm, it is not preferable because it becomes weak in strength and breaks. Conversely, if the thickness exceeds 0.5 mm, a step due to the thickness appears on the surface of the waterproof sheet, which is not preferable.

  When the tape member is used in the form of a tape, it is easier to use a longer length when the slope member 4 is arranged at the boundary of the heat insulating layer 2, and it is convenient to use it as a roll of 30m to 50m, for example.

  Further, the slope member 4 is preferably provided with a hole 4c penetrating vertically. For example, when the base 1 contains moisture or the like, steam may be generated from the base 1 after the heat insulating layer 2 is disposed and the waterproof sheet 3 is laid. If it does so, the vapor | steam which generate | occur | produced in the structure like this invention will raise from the clearance gap between heat insulation layers 2, and will stay in the space below the slope member 4. FIG. If the amount of steam is large, it will swell and appear on the surface of the waterproof sheet 3. The slope member 4 for eliminating the step should be swollen. By providing the through-hole 4c in the slope member 4, even if steam is generated as described above, it can escape to the upper side of the slope member and be exhausted, and a problem such as swelling can be prevented. The holes 4c are provided for providing air permeability above and below the slope member 4 and are not particularly limited in size or number. In the case of the long slope member 4, for example, 0.5. It is better to provide a plurality of holes having a diameter of about 20 mm at a plurality of locations.

  As described above, by laying the waterproof sheet 3 at the boundary between the adjacent heat insulating layers 2 with the slope member interposed, the steps are leveled and no step appears on the surface of the waterproof sheet 3. Therefore, it is possible to use the inexpensive heat insulating layer 2 with no problem in appearance together with a person having excellent heat insulating performance made of polystyrene foam. Of course, the present invention can also be applied to the case where a rigid type polyurethane foam, phenol foam, or the like is used as the heat insulating layer 2.

  EPDM (ethylene propylene diene monomer), IIR (butyl rubber), NR (natural rubber), SBR (styrene butadiene rubber), CR (chloroprene rubber), NBR (acrylonitrile) can be used as the waterproof sheet 3.・ Examples include those made of rubber such as butadiene rubber, HNBR (hydrogenated acrylonitrile, butadiene rubber), CSM (chlorosulfonated polyethylene), and other waterproof sheets made of thermoplastic elastomer, polyethylene, polypropylene, polyvinyl chloride, etc. Can do.

  The thickness is preferably in the range of 1.0 to 2.5 mm. If the thickness is less than 1.0 mm, the waterproof sheet may be easily broken due to insufficient strength, and if it exceeds 2.5 mm, the appearance in which the level difference is increased at the joint is also unfavorable. Further, it is also possible to use a material in which a reinforcing cloth made of glass fiber, polyester fiber or the like is embedded in a sheet of these materials to improve mechanical strength or improve dimensional stability.

  The waterproof sheets 3 are joined to each other at the joint portion 5. However, when the waterproof sheets 3 are joined to each other by heat fusion, in the case of a rubber sheet, the waterproof sheet cannot be used as it is. 3 is obtained by laminating and integrating a thermoplastic resin film on the lower surface of 3. By doing so, the thermoplastic resin film is melted when the lower surface of the end portion of the waterproof sheet 3 is roasted with hot air, and it is possible to perform bonding by thermal fusion by rolling over the other end portion of the waterproof sheet. .

  Laminated and integrated thermoplastic resin films include olefin-based resins such as polyethylene, polypropylene, ethylene vinyl acetate, and ethylene methyl acrylate, and modified olefins such as chlorinated polyethylene, chlorinated polypropylene, and maleated ethylene vinyl acetate. A resin, an olefin-based thermoplastic elastomer, or the like can be used, and a film having a thickness of 50 to 500 μm, more preferably 150 to 250 μm is laminated. If the thickness is less than 50 μm, the strength due to thermal fusion is reduced due to the fact that the thermoplastic resin film does not conform to the pattern on the surface of the sheet, and if it exceeds 500 μm, the waterproof sheet 3 due to the difference in thermal shrinkage with the waterproof sheet body. Large warp is generated, and the flexibility of the waterproof sheet is lost, which makes it difficult to follow the base and the workability is unfavorable.

  As a method of laminating and integrating the waterproof sheet and the thermoplastic resin film, a method using heat fusion or an adhesive may be considered, but by heat fusion, it can be firmly laminated and integrated. Specifically, a waterproof sheet and a thermoplastic film can be stacked and heated and pressurized with a heat roll or the like to be laminated and integrated by heat fusion. Another example is a method in which a thermoplastic resin film is laminated and heated using the heat generated during vulcanization of the waterproof sheet in a heated state shortly after the waterproof sheet is vulcanized.

  Specifically, an unvulcanized rubber sheet extruded from an extruder is placed on an endless belt, sent from an introduction roll into a vulcanization can set to a predetermined temperature (150 to 200 ° C.), vulcanized and derived. It is fed out of the vulcanizing can from the roll and wound around the winding roll through a plurality of guide rolls. At this time, the surface of the vulcanized rubber sheet just sent out from the vulcanization can is 130 to 150 ° C., and the thermoplastic resin film can be easily fused. By using such a vulcanized rubber waterproof sheet in which a thermoplastic resin film is laminated and integrated on one surface, the waterproof sheets can be joined to each other by thermal fusion.

  The polystyrene foam used as the heat insulating layer 2 is a foamed polystyrene resin, and is not limited to a homopolymer of a styrene monomer, but a copolymer, a homopolymer or a copolymer is mixed with another resin. What was shape | molded by the extrusion foam molding method or the bead foam molding method can be used. And it is preferable to use a foaming ratio in the range of 10 to 50 times and a thickness in the range of 5 to 100 mm, more preferably 10 to 50 mm. If the expansion ratio is less than 10 times, the thermal conductivity is increased, and if it exceeds 50 times, the compression and bending strength are lowered, which is not preferable. Further, if the thickness is less than 5 mm, the heat insulating property is lowered, and if it exceeds 100 mm, there is a problem that the walking property after laying is impaired, which is not preferable.

  The heat insulating waterproofing method of the present invention is a heat insulating waterproofing method in which a heat insulating layer is disposed between a base and a waterproof sheet in a waterproofing method applied to a rooftop of a building, and is used as a heat insulating method using polystyrene foam as a heat insulating layer. be able to.

It is sectional drawing which shows the heat insulation waterproofing construction method of this invention. It is the A section expanded sectional view in FIG. It is a section perspective view showing an example of a slope member. It is a cross-sectional perspective view which shows another example of a slope member. It is sectional drawing which shows the conventional heat insulation waterproofing construction method.

DESCRIPTION OF SYMBOLS 1 Ground 2 Heat insulation layer 2a Boundary 3 Waterproof sheet 4 Slope member 4a Non-adhesive part 4b Adhesive part 5 Joining part 10 Fixed disk 11 Anchor member N Adhesive layer

Claims (5)

  In the thermal insulation waterproofing method in which a thermal insulation layer is installed on the ground and a waterproof sheet is laid thereon, polystyrene foam is used as the material for the thermal insulation layer, and multiple thermal insulation layers are arranged side by side. A heat insulating waterproofing method characterized by comprising a slope member arranged so as to straddle adjacent heat insulating layers between the heat insulating layer and the waterproof sheet when it is in a matching place.   The slope member has adhesive portions at both ends across the non-adhesive portion in the central portion in the width direction, and is fixed to the heat insulating layer on each side by the adhesive portion, and the non-adhesive portion is bounded by adjacent heat insulating layers. The heat-insulating waterproofing method according to claim 1, wherein the heat-insulating and waterproofing method is disposed on the surface.   The heat insulation waterproofing method according to claim 1 or 2, wherein the slope member has an initial yield strength of 30 to 150 N / cm.   The heat insulation waterproofing method according to claim 1, wherein the slope member is composed of a tape material and an adhesive layer laminated on both ends of the tape material.   The heat insulation waterproofing method of Claims 1-4 which provides the hole which penetrates up and down in a slope member.

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