Insulated roof and roof renovation method

Abstract

To provide an insulated roof provided with an insulating material added later to roof plates such as an existing folded plate roof, vertical roof or slate roof, and a method for repairing the roof. [Solution] The insulated roof comprises a plate material 18 that forms the roof 12 and has a flat area 22, and a plurality of polystyrene insulation materials 19 that are laid out so as to cover the roof 12, stacked on the flat area 22 from above, and the polystyrene insulation materials 19 have a water-repellent film attached to the surface on the side opposite to the side facing the flat area 22.

Description

[Technical Field]

[0001] The present invention relates to an insulated roof comprising roofing materials such as a folded plate roof, vertical roof or slate roof and polystyrene insulation, and a method for repairing the roof. [Background technology]

[0002] Patent Document 1 discloses a folded-plate roof that is widely used in large buildings such as factories, warehouses, and gymnasiums. In a folded-plate roof, repeated peaks and valleys are formed by plates. The plates tend to absorb heat from sunlight. The plates tend to radiate heat to the attic, which makes it easy for the temperature inside the building to rise. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-296570 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, in buildings, roofing materials are supported by rafters and purlins. For example, in a folded-plate roof, the plates are connected to the purlins with a tight frame. The purlins are then supported by H-shaped steel rafters. There is no structure in the attic to prevent the structure from falling. If you wanted to add insulation to the attic of an existing building, you had to remove the roofing materials from the existing roof and rebuild it. This limited the use of the building when rebuilding the roof. When the building was large, it was difficult to waterproof the entire roof during the rebuilding process, so adding insulation had to be abandoned altogether.

[0005] The present invention aims to provide an insulated roof and a roof renovation method that includes polystyrene insulation added later to roof plates such as an existing folded-plate roof, vertically-roofed roof, or slate roof. [Means for solving the problem]

[0006] According to one form of the present invention, there is provided an insulated roof comprising a plate material forming a roof and having a flat area, and a plurality of polystyrene insulation materials laid out so as to cover the roof, the polystyrene insulation materials having a water-repellent film attached to the surface on the side opposite to the side facing the flat area.

[0007] According to one aspect of the present invention, there is provided a method for renovating a roof, comprising the steps of: (a) forming a roof, covering a board having a flat area with polystyrene insulation having a water-repellent film attached to the surface opposite the surface facing the flat area from above, so that the polystyrene insulation overlaps the flat area, and laying a plurality of the polystyrene insulation materials to cover the roof; (b) applying urethane to cover the surface of the water-repellent film; and (c) applying a top coat layer to the surface of the applied urethane coating layer. [Effects of the Invention]

[0008] As described above, according to the disclosed embodiments, an insulated roof and a roof renovation method are provided in which polystyrene insulation is added later to roof plates such as an existing folded plate roof, vertical roof, or slate roof. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a conceptual diagram illustrating a structure of a building according to an embodiment of the present invention. [Figure 2] An enlarged cross-sectional view of a corrugated roof. [Figure 3] FIG. 1 is a conceptual diagram showing a bolt that connects a plate material to a tight frame. [Figure 4] A conceptual diagram showing screws used to connect polystyrene insulation to a plate. [Figure 5] FIG. 10 is a conceptual diagram showing a polystyrene insulation material according to another specific example. [Figure 6] FIG. 10 is a conceptual diagram showing the wetting and spreading of an adhesive along a groove. [Figure 7] FIG. 1 is an enlarged cross-sectional view of a tiled roof. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0011] FIG. 1 shows a schematic diagram of a building 11 according to a first embodiment of the present invention. The building 11 has a framework (structure) 13 that supports a roof 12. A large-span, column-free space is formed in the framework 13. The framework 13 is made of, for example, a steel frame. Walls 14 are assembled using columns and beams. Such a building 11 is used, for example, as a factory, warehouse, or gymnasium.

[0012] The framework 13 includes rafters 15 that support the load of the roof 12. The rafters 15 extend from the ridge 15a down to the eaves. The rafters 15 may be configured as the top chord of a truss structure. For example, H-shaped steel is used for the rafters 15. The rafters 15 are arranged parallel to each other at equal intervals.

[0013] Purlins 16 extending parallel to the ridge 15a are placed across the rafters 15. The purlins 16 are perpendicular to the rafters 15. For example, H-shaped steel is used for the purlins 16. The purlins 16 are arranged on the rafters 15 at equal intervals and parallel to each other.

[0014] The roof 12 comprises plates 18 fixed to the purlins 16 to form a folded-plate roof. Polystyrene insulation 19 covers the plates 18 from above. The plates 18 and the polystyrene insulation 19 form an insulated roof 20. The polystyrene insulation 19 is made from flat plates of hard resin foam insulation. For example, extruded polystyrene foam insulation is used as the hard resin foam insulation. A typical example of extruded polystyrene foam insulation is Styrofoam (registered trademark). The polystyrene insulation 19 has a compressive strength of, for example, 20 [N / cm 2 The roof 12 will be described in detail later. The polystyrene insulation 19 does not have to be rigid.

[0015] As shown in Figure 2, the plate material 18 that forms the folded-plate roof has valleys 21a and peaks 21b. The valleys (span portions) 21a of the plate material 18 are overlapped on the plane of the purlin material 16. The peaks (peaks) 21b form flat areas 22 that are parallel to the plane of the purlin material 16. The plate material 18 is formed by bending galvanized steel sheet (galvanized iron), stainless steel sheet, or the like.

[0016] To secure the plate material 18, a tight frame 23 is fixed to the purlin material 16. The tight frame 23 has valleys 23a and peaks 23b according to the shape of the folded-plate roof. The tight frame 23 is overlapped on the plane of the purlin material 16 at the valleys 23a. The valleys 23a are connected to the purlin material 16. For example, welding is used for the connection. The peaks 23b of the tight frame 23 are connected to the peaks 21b of the plate material 18. For example, bolts and nuts are used for the connection.

[0017] Polystyrene insulation 19 is laid out on the plate 18. The polystyrene insulation 19 is placed on the flat area 22 of the plate 18 from above. An adhesive 24 is sandwiched between the flat area 22 and the polystyrene insulation 19. The adhesive 24 secures the polystyrene insulation 19 to the flat area 22. A modified silicone adhesive is used for the adhesive 24, for example. Double-sided tape 25 is placed on the flat area 22 at a position offset from the adhesive 24. The double-sided tape 25 is sandwiched between the flat area 22 and the polystyrene insulation 19. The double-sided tape 25 secures the polystyrene insulation 19 to the flat area 22. A butyl tape is used for the double-sided tape 25, for example. Here, the polystyrene insulation 19 is supported on the plate 18 across multiple ridges 21b. For each piece of polystyrene insulation 19, the adhesive 24 adheres the polystyrene insulation 19 to, for example, a pair of ridges 21b that are spaced apart from each other. The double-sided tape 25 adheres the polystyrene insulating material 19 to one or more of the peaks 21b between the pair of peaks 21b.

[0018] A waterproofing material may be placed on the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 19 to prevent water, such as rainwater, from entering the seams between the polystyrene insulation materials 19. The waterproofing material may be a waterproof board, waterproof sheet, waterproof film, or waterproof tape. Here, waterproof tape 27 is attached to the seams between the polystyrene insulation materials 19. Details of the water-repellent film 42 will be described later. For example, the waterproof tape 27 may be a tape made of an acrylic adhesive, a silicone adhesive, a urethane adhesive, or a rubber adhesive. The waterproof tape 27 spans the seams and seals them from above. The surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 19 is covered with a urethane coating layer 28. The urethane coating layer 28 overlies the waterproof tape 27. The urethane coating layer 28 has a flattened surface. The urethane coating layer 28 absorbs any unevenness between the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 19 and the waterproof tape 27. The urethane coating layer 28 covers at least a part or all of the surface of the side surface exposed to the outside of the polystyrene thermal insulation material 19 located at the outermost periphery of the spread polystyrene thermal insulation material 19.

[0019] A topcoat layer 29 is laminated on the surface of the urethane coating layer 28. An acrylic urethane paint containing thinner as a solvent is used for the topcoat layer 29. The topcoat layer 29 has better weather resistance than the polystyrene insulation material 19.

[0020] In the building 11 of this embodiment, the roof (folded-plate roof) 12 is covered from above with polystyrene insulation 19. Sunlight is blocked by the polystyrene insulation 19. Even if sunlight is converted into heat on the surface of the polystyrene insulation 19, the polystyrene insulation 19 inhibits heat transfer. The temperature rise of the roof 12 is reduced. In this way, the temperature inside the building 11 is prevented from rising too high. The polystyrene insulation 19 covers the roof 12 from the front side. The existing roof 12 is preserved as is. Reconstruction of the roof 12 is avoided. The top coat layer 29 reinforces the weather resistance of the urethane coating layer 28.

[0021] The polystyrene insulation 19 blocks ultraviolet radiation, preventing the adhesive 24 from being exposed to ultraviolet rays. Even if the adhesive 24 itself is not weather-resistant, deterioration of the adhesive 24 is significantly suppressed. The fixation of the polystyrene insulation 19 is maintained for a long period of time. The range of applicable adhesives 24 is expanded. Moreover, raindrops are blocked by the polystyrene insulation 19 and do not strike the board 18 directly. The sound of rain is suppressed.

[0022] When adding polystyrene insulation 19 to the roof of an existing building, flat polystyrene insulation 19 is placed on top of sheet material 18. The polystyrene insulation 19 may be pre-cut to a predetermined shape and size and then transported to the roof renovation site. When placing the flat polystyrene insulation 19 on sheet material 18, a fluid adhesive 24 is applied to the flat areas 22 of sheet material 18 or to the polystyrene insulation 19. The peaks 21b are selected for application. Double-sided tape 25 is attached to the peaks 21b other than the selected peaks 21b. When the polystyrene insulation 19 is placed on the flat areas 22 of sheet material 18, the adhesive 24 and double-sided tape 25 are sandwiched between the flat areas 22 and the polystyrene insulation 19. The double-sided tape 25 holds the polystyrene insulation 19 on the roof 12 until the adhesive 24 hardens. The polystyrene insulation 19 remains firmly attached even when exposed to wind. Moreover, since the double-sided tape 25 is butyl tape, fine adjustment of the position of the polystyrene heat insulating material 19 is permitted.

[0023] Waterproof tape 27 is attached as a waterproof member to the surface of water-repellent film 42 that is laminated on the surface of polystyrene insulation 19 along the seams between the polystyrene insulation pieces 19. The seams between the polystyrene insulation pieces 19 are sealed. The waterproof tape 27 prevents water from seeping into the seams between the polystyrene insulation pieces 19. The polystyrene insulation pieces 19 maintain good waterproofing. Because the polystyrene insulation pieces 19 and waterproof tape 27 block rainwater, the adhesive 24 can solidify well without being exposed to rainwater.

[0024] Next, urethane is applied to the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 19. For example, spray application is used. The urethane adheres well to the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 19 and to the waterproof tape 27. The surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 19 is flattened by the urethane application. The waterproof tape 27 is hidden. Next, a fluid topcoat layer 29 is applied to the surface of the urethane coating layer 28. The urethane coating layer 28 is applied so as to cover at least part or all of the surface of the exposed side of the outermost polystyrene insulation 19 among the laid polystyrene insulation 19. This prevents the thinner contained as a solvent in the fluid topcoat layer 29 from coming into contact with the polystyrene insulation 19 on part or all of the exposed side of the polystyrene insulation 19, thereby preventing dissolution of the polystyrene insulation 19 due to contact.

[0025] Here, the polystyrene insulation 19 is 20 [N / cm 2 Since the polystyrene insulation 19 has a compressive strength of at least 100 MPa, even if a worker stands on the polystyrene insulation 19 that is layered on the flat area 22, the polystyrene insulation 19 is prevented from collapsing. The worker can work as usual on the polystyrene insulation 19 that covers the roof 12, thereby improving work efficiency.

[0026] In this embodiment, the polystyrene insulation 19 is supported by the peaks 21b of the boards 18. As long as the worker's feet are supported by the peaks 21b, the force of stepping on the polystyrene insulation 19 is structurally supported by the roof 12. Regardless of the formation of the valleys 21a, bending or other deformation of the polystyrene insulation 19 is prevented, allowing the worker to proceed with the work smoothly.

[0027] As shown in FIG. 3 , in the roof 12, bolts (e.g., pointed bolts) 32 may be used to connect the sheet material 18 to the tight frame 23. The pointed bolt 32 has a shaft 32a that extends upright from the peak 23b of the tight frame 23. The shaft 32a penetrates the sheet material 18. When a nut 33 is engaged with the shaft 32a, the sheet material 18 is connected to the tight frame 23. In this case, a through-hole 34 extending upright from the planar area 22 of the sheet material 18 is formed in the polystyrene insulation 19. The pointed bolt 32 and nut 33 are housed within the space of the through-hole 34. In this way, the polystyrene insulation 19 can be securely attached to the sheet material 18. A patch tape 35 is attached to the surface of the polystyrene insulation 19 to airtightly seal the through-hole 34. A patch tape 35 similar to the waterproof tape 27 is used for the patch tape 35. A urethane coating layer 28 covers the patch tape 35. The urethane coating layer 28 absorbs the difference in level between the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 19 and the patch tape 35. Alternatively, the space in the through-hole 34 may be filled with an injected filler. If the space in the through-hole 34 is filled with a filler, the patch tape 35 may be omitted.

[0028] As shown in FIG. 4, on the roof 12, screws 37 may be used to connect the polystyrene insulation 19 to the sheet material 18 instead of, or in addition to, the adhesive 24 and double-sided tape 25. The screws 37 penetrate the polystyrene insulation 19 from above. The heads of the screws 37 remain on the surface of the polystyrene insulation 19. The shafts of the screws 37 are threaded into the threads 21b of the sheet material 18. The shafts may be threaded into the tight frame 23 together with the sheet material 18. Patch tape 38 may be attached to the surface of the polystyrene insulation 19, covering the heads of the screws 37. The patch tape 38 may be similar to the waterproof tape 27. The patch tape 38 prevents moisture from entering along the screws 37. A urethane coating layer 28 covers the patch tape 38. The urethane coating layer 28 absorbs the unevenness between the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 19 and the patch tape 38. Furthermore, in the roof 12, instead of, or in addition to, the adhesive 24 and double-sided tape 25, fasteners may be used to connect the polystyrene insulation 19 to the sheet material 18. Examples of fasteners include a metal fastener disk and fastener screws that pass through holes in the metal fastener disk. The polystyrene insulation 19 and sheet material 18 can be connected by placing the metal fastener disk on the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 19, and then threading the fastener screws through the holes in the metal fastener disk until they penetrate the polystyrene insulation 19 and the sheet material 18. In this case, the urethane coating layer 28 covers the metal fastener disk and fastener screws. The urethane coating layer 28 absorbs the difference in level between the surface of the water-repellent film 42 laminated on the surface of the polystyrene heat insulating material 19 and the metal fixing disk plate and fixing screws.

[0029] As shown in FIG. 5, multiple rows of grooves 41b may be formed on the back surface of the polystyrene insulation 19. Multiple rows of grooves 41a may also be formed on the front surface of the polystyrene insulation 19. The grooves 41a and 41b extend, for example, parallel to each other. The grooves 41a and 41b are arranged at equal intervals. The back surface of the polystyrene insulation 19 is received by the flat area 22 of the plate 18. As shown in FIG. 6, when the polystyrene insulation 19 is placed on the flat area 22, the grooves 41a and 41b intersect with the flow direction Dst. In this case, the grooves 41a and 41b are perpendicular to the flow direction Dst. When the polystyrene insulation 19 is pressed against the fluid of the adhesive 24 on the flat area 22, the fluid of the adhesive 24 spreads along the grooves 41b. The adhesive area between the adhesive 24 and the polystyrene insulation 19 increases. The adhesion of the polystyrene insulation 19 is strengthened. If the width of the applied fluid of adhesive 24 is narrower than the width of flat region 22, the fluid of adhesive 24 is pushed out into grooves 41b between polystyrene insulation 19 and flat region 22. The fluid of adhesive 24 is more likely to wet and spread along grooves 41b. When polystyrene insulation 19 is placed on flat region 22, grooves 41a and 41b may be aligned with the flow direction Dst. Even in this case, if the fluid of adhesive 24 is applied in a direction intersecting the flow direction Dst and the polystyrene insulation 19 is pressed against the fluid of adhesive 24 on flat region 22, the fluid of adhesive 24 will wet and spread along grooves 41b. As a result, the adhesion area between adhesive 24 and polystyrene insulation 19 increases, and the adhesion of polystyrene insulation 19 is strengthened.

[0030] A water-repellent film 42 is laminated on the surface of the polystyrene insulation 19. The water-repellent film 42 covers the entire surface of the polystyrene insulation 19. When the polystyrene insulation 19 is added to an existing building, rainwater and other water are removed or easily removed from the surface of the water-repellent film 42 prior to the application of the urethane. The urethane solidifies well on the surface of the water-repellent film 42. The urethane prevents foaming due to moisture. The water-repellent film 42 consists of three layers: a base layer that adheres to the polystyrene insulation 19, a substrate layer that supports the base layer and the water-repellent layer, and a water-repellent layer that provides water repellency. The base layer is, for example, a thermoplastic resin layer, specifically, a polystyrene layer, a biaxially oriented polystyrene layer, a polyethylene layer, an ethylene-vinyl acetate copolymer layer, or a polypropylene layer. The substrate layer is, for example, a metal layer, a thermoplastic resin nonwoven fabric layer, or a glass fiber layer. The metal layer may be an aluminum layer or a copper layer, and the thermoplastic resin nonwoven fabric layer may be a polyethylene nonwoven fabric layer, a polypropylene nonwoven fabric layer, or a polyethylene terephthalate nonwoven fabric layer. The water-repellent layer may be, for example, a thermoplastic resin layer or a paint layer. The thermoplastic resin layer may be a polyethylene layer, a polypropylene layer, or a polyethylene terephthalate layer, and the paint layer may be a urethane-based paint layer, a polyester-based paint layer, or an acrylic paint layer. A combination of a base layer, a substrate layer, and a water-repellent layer may be, for example, a biaxially oriented polystyrene layer as the base layer, an aluminum layer as the substrate layer, and a polyethylene terephthalate layer as the water-repellent layer. When a thermoplastic resin layer is used as the water-repellent layer, a colorant may be added to the thermoplastic resin. Furthermore, when a paint layer is used as the water-repellent layer, a colored paint may be used. This allows the coloring of the water-repellent layer to suppress reflection, even if a sunlight-reflective layer such as an aluminum layer is used as the substrate layer, allowing workers to work smoothly. As the colorant to be added to the thermoplastic resin, organic pigments, inorganic pigments, disperse dyes, and solvent dyes are used.

[0031] FIG. 7 shows a schematic diagram of the structure of a roof 51 of a building according to a second embodiment of the present invention. The roof 51 comprises plates 52 fixed to rafters 15 to form a tile roof, which is a type of vertical roof. A flat area 61 of the plates 52 is covered from above with polystyrene insulation 53. The plates 52 and the polystyrene insulation 53 form an insulated roof 49. The polystyrene insulation 53 is made from a flat plate of rigid resin foam insulation. For example, extruded polystyrene foam insulation is used as the rigid resin foam insulation. The polystyrene insulation 53 has a resistance of, for example, 20 [N / cm 2 The heat insulating material 53 does not have to be rigid.

[0032] To secure the boards 52, sheathing boards 54 are supported on the rafters 15. The sheathing boards 54 enclose the indoor space of the building. Asphalt roofing 55 is layered on the sheathing boards 54. A unit of boards 52 is layered on top of the asphalt roofing 55. The unit includes grooved boards 52a that form a flat roofing section 57 that separates the shingle rods 56, retaining clips 52b that are fitted from above between the grooved boards 52a and support the core 58 of the shingle rods 56, and caps 52c that cover the retaining clips 52b. A flat area 61 that is parallel to the plane of the rafters 15 is formed in the flat roofing section 57. The grooved boards 52a, retaining clips 52b, and caps 52c are formed by bending galvanized steel sheet (galvanized iron), stainless steel sheet, or the like.

[0033] Polystyrene insulation 53 is laid on the plate material 52. The polystyrene insulation 53 is placed on the flat area 61 of the plate material 52 from above. An adhesive 24 is sandwiched between the flat area 61 and the polystyrene insulation 53. The adhesive 24 secures the polystyrene insulation 53 to the flat area 61. A modified silicone adhesive is used for the adhesive 24, for example. A double-sided tape 25 is placed on the flat area 61 at a position offset from the adhesive 24. The double-sided tape 25 is sandwiched between the flat area 61 and the polystyrene insulation 53. The double-sided tape 25 secures the polystyrene insulation 53 to the flat area 61. Butyl tape is used for the double-sided tape 25, for example. The polystyrene insulation 53 has a non-interference groove 62 that avoids the shingle rods 56.

[0034] As with the roof 12 described above, waterproof tape 27 is applied to the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 53 at the joints between the polystyrene insulation materials 53 as a waterproofing member. The waterproof tape 27 spans the joints and seals them from above. The surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 53 is covered with a urethane coating layer 28. The urethane coating layer 28 covers the waterproof tape 27. The urethane coating layer 28 has a flattened surface. The urethane coating layer 28 absorbs any unevenness between the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 53 and the waterproof tape 27. The urethane coating layer 28 covers at least part or all of the surface of the side exposed to the outside of the polystyrene insulation material 53 located at the outermost periphery of the laid-out polystyrene insulation material 53.

[0035] A top coat layer 29 is laminated on the surface of the urethane coating layer 28. An acrylic urethane paint containing thinner as a solvent is used for the top coat layer 29. The top coat layer 29 has better weather resistance than the polystyrene heat insulating material 53.

[0036] In the building 11 of this embodiment, the roof (vertical roof) 51 is covered from above with polystyrene insulation 53. Sunlight is blocked by the polystyrene insulation 53. Even if sunlight is converted into heat on the surface of the polystyrene insulation 53, the polystyrene insulation 53 inhibits heat transfer. The temperature rise of the roof 51 is reduced. In this way, the temperature inside the building is prevented from rising too high. The polystyrene insulation 53 covers the roof 51 from the front side. The existing roof 51 is preserved as is. Reconstruction of the roof 51 is avoided. The top coat layer 29 reinforces the weather resistance of the urethane coating layer 28.

[0037] The polystyrene insulation 53 blocks ultraviolet radiation, preventing the adhesive 24 from being exposed to ultraviolet rays. Even if the adhesive 24 itself is not weather-resistant, deterioration of the adhesive 24 is significantly suppressed. The fixation of the polystyrene insulation 53 is maintained for a long period of time. The range of applicable adhesives 24 is expanded. Moreover, raindrops are blocked by the polystyrene insulation 53 and do not strike the board 52 directly. The sound of rain is suppressed.

[0038] When adding polystyrene insulation 53 to the roof of an existing building, the flat polystyrene insulation 53 is placed on the flat area 61 of the plate 52. The polystyrene insulation 53 may be pre-processed to a predetermined shape and dimensions and then transported to the roof renovation site. When the flat polystyrene insulation 53 is placed on the flat area 61 of the plate 52, a fluid adhesive 24 is applied to the flat area 61 of the plate 52 or the polystyrene insulation 53. As in the first embodiment, multiple rows of grooves may be formed on the back surface of the polystyrene insulation 53. The multiple rows of grooves may extend parallel to each other, for example. The multiple rows of grooves are arranged at equal intervals. The back surface of the polystyrene insulation 53 is received by the flat area 61 of the plate 52. When the polystyrene insulation 53 is placed on the flat area 61, the grooves intersect with the flow direction Dst. When the polystyrene insulation 53 is pressed against the fluid adhesive 24 in the flat area 61, the fluid adhesive 24 wets and spreads along the grooves. The adhesive area between the adhesive 24 and the polystyrene insulation 53 increases. The adhesion of the polystyrene insulation 53 is strengthened. When the polystyrene insulation 53 is placed on the flat area 61, the grooves may be aligned with the flow direction Dst. In this case, the fluid adhesive 24 is applied in a direction intersecting the flow direction Dst. When the polystyrene insulation 53 is pressed against the fluid adhesive 24 in the flat area 61, the fluid adhesive 24 wets and spreads along the grooves. As a result, the adhesive area between the adhesive 24 and the polystyrene insulation 53 increases, and the adhesion of the polystyrene insulation 53 is strengthened. Multiple rows of grooves may also be formed on the surface of the polystyrene insulation 53. Double-sided tape 25 is attached to the flat area 61 or the polystyrene insulation 53 in areas other than the adhesive 24. When the polystyrene insulation 53 is received on the flat area 61 of the plate 52, the adhesive 24 and double-sided tape 25 are sandwiched between the flat area 61 and the polystyrene insulation 53. The double-sided tape 25 holds the polystyrene insulation 53 on the roof 51 until the adhesive 24 hardens. The polystyrene insulation 53 remains firmly fixed even when the flat plate of polystyrene insulation 53 is exposed to wind. Moreover, because the double-sided tape 25 is butyl tape, fine adjustment of the position of the polystyrene insulation 53 is permitted. As in the first embodiment, the polystyrene insulation 53 and the plate 52 may be joined using fixing brackets and fixing screws.

[0039] Here, waterproof tape 27 is attached as a waterproof member to the surface of water-repellent film 42 that is laminated on the surface of polystyrene insulation 53 along the seams between the polystyrene insulation pieces 53. The seams between the polystyrene insulation pieces 53 are sealed. The waterproof tape 27 prevents water from seeping into the seams between the polystyrene insulation pieces 53. The polystyrene insulation pieces 53 maintain good waterproofing. Because the polystyrene insulation pieces 53 and waterproof tape 27 block rainwater, the adhesive 24 can solidify well without being exposed to rainwater.

[0040] Next, urethane is applied to the surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 53. For example, spray application is used. It adheres well to the surface of the water-repellent film and the waterproof tape 27. The surface of the water-repellent film 42 laminated on the surface of the polystyrene insulation 53 is flattened by the urethane coating. The waterproof tape 27 is hidden. Next, a fluid topcoat layer 29 is applied to the surface of the urethane coating layer 28 laminated on the surface of the water-repellent film 42. The urethane coating layer 28 is applied so as to cover at least part or all of the exposed side surface of the outermost polystyrene insulation 53 among the laid polystyrene insulation 53. This prevents the thinner contained as a solvent in the fluid topcoat layer 29 from coming into contact with the polystyrene insulation 53 on part or all of the exposed side surface of the polystyrene insulation 53, thereby preventing dissolution of the polystyrene insulation 53 due to contact.

[0041] Here, the polystyrene insulation 53 has a resistance of 20 [N / cm 2 ] or more, even if a worker stands on the polystyrene insulation material 53 that is layered on the flat area 61, the polystyrene insulation material 53 is prevented from collapsing. The worker can work as usual on the polystyrene insulation material 53 that covers the roof 51. This improves work efficiency.

[0042] In this embodiment, the polystyrene insulation 53 is supported by the flat roofing portions 57 of the boards 52. As long as the worker's feet are supported by the flat roofing portions 57, the force of stepping on the polystyrene insulation 53 is structurally supported by the roof 51. Bending or other deformation of the polystyrene insulation 53 is prevented. The worker can proceed with the work smoothly.

[0043] The present invention is not limited to the folded-plate roof of the first embodiment or the vertically roofed roof of the second embodiment, but can be applied to any roof equipped with plate materials, such as a slate roof. Furthermore, the present invention can also be applied to roofs equipped with plate materials, such as roofs that slope in only one direction or roofs that are parallel to the ground. [Explanation of symbols]

[0044] 11 Buildings 12 Folded plate roof Building 15a 18 Board material 19 Polystyrene insulation 20 Insulated Roof 21b (Plate) Summit (Mountain) 22 plane area 24 Adhesive 25 double-sided tape 27 Waterproof tape 28 Urethane coating layer 29 Topcoat layer 41 Groove 42 Water-repellent film 49 Insulated Roof 51 Vertical roof 52 Board material 56 Tile Bar 57 Flat roof section 61 plane area 62 Non-interference groove

Claims

1. a plate member forming a roof and having a flat area; A plurality of polystyrene foam insulation materials laid on the planar area from above to cover the roof; In the polystyrene foam insulation, a water-repellent film is attached to the surface opposite to the surface facing the flat area; a urethane coating layer covering the surface of the water-repellent film; A top coat layer is provided on the surface of the urethane coating layer. Insulated roof.

2. At least a portion of the surface of the side of the outermost polystyrene foam insulation material that is exposed to the outside is covered with the urethane coating layer. The insulated roof of claim 1.

3. The water-repellent film is made up of three layers, in order from the polystyrene foam heat insulating material side: a base layer, a base material layer, and a water-repellent layer.

3. An insulated roof according to claim 1 or 2.

4. The polystyrene foam insulation has a resistance of 20 N / cm ２ Has a compressive strength of more than The insulated roof of claim 1.

5. an adhesive sandwiched between the planar area and the polystyrene foam insulation material to secure the polystyrene foam insulation material to the planar area; and a double-sided tape sandwiched between the flat area and the polystyrene foam insulation at a position away from the adhesive, the double-sided tape securing the polystyrene foam insulation to the flat area. The insulated roof of claim 1.

6. an adhesive sandwiched between the planar area and the polystyrene foam insulation material to secure the polystyrene foam insulation material to the planar area; The polystyrene foam insulation has a plurality of rows of grooves on a surface facing the flat area, The adhesive extends in a direction intersecting the direction in which the rows of grooves extend, and further wets and spreads along the rows of grooves. The insulated roof of claim 1.

7. (a) forming a roof, and covering a plate having a flat area with a polystyrene foam insulation material having a water-repellent film attached to the surface opposite to the surface facing the flat area from above the plate material so as to overlap the flat area, and laying a plurality of the polystyrene foam insulation materials so as to cover the roof; (b) applying urethane to cover the surface of the water-repellent film; (c) applying a top coat layer to the surface of the applied urethane coating layer. How to repair a roof.

8. Prior to the step (a), the polystyrene foam insulation material is processed into a predetermined shape and size and then transported to the roof renovation site. The roof repair method according to claim 7.

9. In the step (b), urethane is applied to cover at least a portion of the surface of the side of the outermost polystyrene foam insulation material that is exposed to the outside. The roof repair method according to claim 7.

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