Roof double-prevention double-row waterproof structure
By incorporating a double-row waterproof structure and concealed drains into the roof construction, the leakage problem of traditional roof waterproofing structures is solved, enabling timely drainage and protection of the insulation layer, thereby improving the waterproofing effect and thermal efficiency of the living environment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-03-13
AI Technical Summary
Traditional flat roof waterproofing structures are prone to leakage, which weakens the performance of the insulation layer and may even cause cold bridging, affecting the living environment. Moreover, leaks are not easy to detect and deal with quickly.
Design a double-layer waterproof structure for the roof, including a first slope layer, a first waterproof layer, an insulation layer, a second slope layer, a leveling layer, a second waterproof layer, and a roof waterproof protective layer. Install concealed drains to drain leaking water and prevent water accumulation, and drain water through indoor pipes to prevent blockage of roof rainwater pipes.
It effectively prevents water accumulation on the roof, promptly detects leaks, avoids cold bridging, ensures the performance of the roof insulation layer, reduces heat loss, and improves the quality of the living environment.
Smart Images
Figure CN223991526U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building structure technology, and in particular to a double-proof and double-row waterproof structure for roofs. Background Technology
[0002] Traditional flat roof waterproofing relies on a waterproof layer on the leveling layer for protection and the slope of the roof with drainage outlets to form a waterproof system. However, repairs to existing building roofs have revealed that when leaks occur, the vapor barrier material provides some waterproofing, preventing water from quickly seeping into the interior. By the time leaks become apparent indoors, a significant amount of water has accumulated on the roof over a prolonged period, sometimes reaching 3-4 centimeters. Furthermore, during construction, water used for application or rainwater can seep into the insulation layer before the waterproof membrane is applied, creating small amounts of water on the vapor barrier. Both of these conditions weaken the roof insulation and can even lead to secondary damage such as thermal bridging. This severely impacts the living environment of residents and is a common quality issue with a high rate of resident complaints. Summary of the Invention
[0003] To solve the above problems, this utility model provides the following solution:
[0004] A double-layer waterproof roof structure includes a roof surface formed by structural slabs and a parapet wall at the edge of the roof. A drainage and waterproof layer is laid on top of the roof surface, and a roof drain outlet is located at the end of the drainage and waterproof layer away from the parapet wall. The drainage and waterproof layer includes, from bottom to top, a first slope-forming layer, a first waterproof layer, an insulation layer, a second slope-forming layer, a leveling layer, a second waterproof layer, and a roof waterproof protective layer. The slope of the first slope-forming layer from one end of the parapet wall to the opposite end of the parapet wall is 1%. A concealed drain is located at the lower end of the first waterproof layer facing downwards from the roof surface, and the first waterproof layer extends to the inner wall of the concealed drain. The first waterproof layer extends upwards to the inner wall of the parapet wall at the end closest to the parapet wall. The slope of the second slope-forming layer from one end of the parapet wall to the end away from the parapet wall is 2%. The second waterproof layer extends upwards to the inner wall of the parapet wall at the end closest to the parapet wall. Both the first and second waterproof layers cover the sidewalls of the roof drain outlets.
[0005] Furthermore, expansion joints are provided between the second slope-finding layer and the parapet wall, and between the end of the roof waterproofing protective layer near the parapet wall and the second waterproofing layer extending to the parapet wall.
[0006] Furthermore, the first slope-finding layer is made of C20 fine aggregate concrete; the first waterproof layer is made of a 1.5mm thick single-layer polymer wet-laid self-adhesive roll material; and the second slope-finding layer is made of lightweight concrete.
[0007] Furthermore, if the height of the parapet wall is greater than or equal to 500mm, the first waterproof layer extends upward by 150mm from the end closest to the parapet wall, and the second waterproof layer extends upward by 500mm from the end closest to the parapet wall.
[0008] Furthermore, if the height of the parapet wall is between 150mm and 500mm, the first waterproof layer extends upward 150mm from the end near the parapet wall, and the second waterproof layer extends upward from the end near the parapet wall and then folds outward from the parapet wall.
[0009] Furthermore, the roof waterproofing protective layer includes an isolation layer and a waterproofing protective layer from bottom to top.
[0010] Furthermore, the isolation layer is constructed by splicing together geotextile molds with a width of 0.8mm; the waterproof protective layer is made of waterproof concrete.
[0011] Furthermore, the joints of the isolation layer are welded or glued.
[0012] The beneficial effects of this utility model are as follows: a first slope-forming layer and a first waterproof layer are set on the structural slab, and a concealed floor drain is constructed on this layer to form a double-roof waterproof system. When the upper waterproof layer of the roof "leaks," because this layer has both waterproofing and drainage functions, the leaked water will be discharged through the concealed floor drain, preventing a large amount of water from accumulating on the roof. The floor drain is not directly connected to the roof rainwater pipe, but is connected to the vicinity of the floor drain in the building's equipment room through a pipe, and the water is drained through the equipment room floor drain. This avoids the blockage of the roof rainwater pipe, rainwater backflow into the roof, and heat loss from the roof due to ventilation of the roof rainwater pipe in winter; since it is not directly connected to the rainwater pipeline, but rather allows for quick detection of the first layer of roof leakage by observing whether the indoor pipes are dripping through the equipment room, ensuring timely repair. Attached Figure Description
[0013] Figure 1 This is a top view of the structure of this utility model;
[0014] Figure 2 This is a side view of the structure of this utility model;
[0015] Figure 3 This is a schematic diagram of the front pressure head structure.
[0016] 1. Roof surface; 2. Parapet wall; 3. First slope layer; 4. First waterproof layer; 5. Insulation layer; 6. Second slope layer; 7. Leveling layer; 8. Second waterproof layer; 9. Roof waterproof protective layer; 10. Concealed floor drain; 11. Roof rainwater outlet; 12. Expansion joint; L1, length of the first waterproof layer extending to the parapet wall; L2, length of the second waterproof layer extending to the parapet wall; L3, distance between the concealed floor drain and the roof rainwater outlet. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to embodiments. Specific details will be involved in the following description to ensure a thorough understanding of the present invention. However, the present invention can still be realized without these specific details, meaning that those skilled in the art can more effectively explain the nature of their work to other skilled in the art using these descriptions and statements herein. Furthermore, it should be understood that the specific embodiments described herein are merely illustrative of the application and are not intended to limit the actual scope of protection. All raw materials used in the following embodiments are commercially available products.
[0018] Example 1: As Figures 1-3 As shown, a double-layer waterproof roof structure includes a roof surface 1 formed by structural slabs and a parapet wall 2 at the edge of the roof. A drainage and waterproof layer is laid on top of the roof surface 1, and a roof rainwater inlet 11 is provided at the end of the drainage and waterproof layer away from the parapet wall 2. The drainage and waterproof layer includes, from bottom to top, a first slope-forming layer 3, a first waterproof layer 4, a thermal insulation layer 5, a second slope-forming layer 6, a leveling layer 7, a second waterproof layer 8, and a roof waterproof protective layer 9. The slope of the first slope-forming layer 3 from one end of the parapet wall 2 to the opposite end of the parapet wall 2 is 1°. %; a concealed drain 10 is installed at the lower end of the first waterproof layer 4 and on the inner side of the roof rainwater outlet 9 facing downwards towards the roof, and the first waterproof layer 4 extends to the inner side wall of the concealed drain 10; the first waterproof layer 4 extends upwards to the inner wall of the parapet wall 2 at the end near the parapet wall 2; the slope of the second slope-forming layer 6 from one end of the parapet wall 2 to the end away from the parapet wall 2 is 2%; the second waterproof layer 8 extends upwards to the inner wall of the parapet wall 2 at the end near the parapet wall 2; both the first waterproof layer 4 and the second waterproof layer 8 cover the outer side wall of the roof rainwater outlet 9.
[0019] Expansion joints 12 are provided between the second slope-finding layer 6 and the parapet wall 2, and between the end of the roof waterproof protective layer 9 near the parapet wall 2 and the second waterproof layer 8 extending to the parapet wall 2.
[0020] The first slope-finding layer 3 is made of C20 fine aggregate concrete; the first waterproof layer 4 is made of 1.5mm thick single-layer polymer wet-laid self-adhesive roll material; the second slope-finding layer 6 is made of lightweight concrete.
[0021] If the height of the parapet wall 2 is greater than or equal to 500mm, the length L1 of the first waterproof layer extending to the parapet wall is 150mm; the length L2 of the second waterproof layer extending to the parapet wall is 500mm. If the height of the parapet wall 2 is between 150mm and 500mm, the length L1 of the first waterproof layer extending to the parapet wall is 150mm, and the second waterproof layer 8 extends upwards near the end of the parapet wall 2 and then folds outwards towards the parapet wall 2.
[0022] The roof waterproof protective layer 9 comprises an isolation layer and a waterproof protective layer from bottom to top. The isolation layer is constructed by splicing together 0.8mm wide geotextile molds; the joints of the isolation layer are welded or glued. The waterproof protective layer is cast from waterproof concrete. The distance between the concealed drain 10 and the roof rainwater inlet 11 is 300-500mm.
[0023] This invention features a first slope-forming layer 3 and a first waterproof layer 4 on the structural slab, with a concealed drain 10 installed on this layer, forming a double-roof waterproofing system. When the second waterproof layer 8 on the upper part of the roof leaks, the leaking water will be discharged through the concealed drain 10 because the first waterproof layer 4 has both waterproofing and drainage functions, preventing a large amount of water from accumulating on the roof. The concealed drain 10 is not directly connected to the roof rainwater inlet 11, but instead connects to the vicinity of the floor drain in the indoor equipment room via an indoor pipe, allowing drainage through the equipment room floor drain. This avoids blockage of the pipes connected to the roof rainwater inlet 11, preventing rainwater backflow into the roof and heat loss from the roof due to ventilation of the roof rainwater pipes in winter. Furthermore, by not being directly connected to the rainwater pipes, it allows for quick detection of leaks in the first layer of the roof by observing whether the indoor pipes are dripping, ensuring timely repairs.
[0024] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A roof double-proof double-row waterproof structure, characterized in that: The roof surface and the parapet wall of the roof edge are provided by a structural slab, a drainage waterproof layer is laid on the roof surface, a roof rainwater outlet is arranged at the end of the drainage waterproof layer away from the parapet wall; the drainage waterproof layer comprises, from bottom to top, a first slope layer, a first waterproof layer, an insulation layer, a second slope layer, a leveling layer, a second waterproof layer and a roof waterproof protective layer; the first slope layer has a slope of 1% from the end of the parapet wall to the opposite end of the parapet wall; a hidden drain is arranged at the lower end of the first waterproof layer and the inner side of the roof rainwater outlet, the first waterproof layer extends to the inner side wall of the hidden drain, and the distance between the hidden drain and the roof rainwater outlet is 300-500 mm; the first waterproof layer extends upward to the parapet wall near the end of the parapet wall; the second slope layer has a slope of 2% from the end of the parapet wall to the end away from the parapet wall; the second waterproof layer extends upward to the parapet wall near the end of the parapet wall; the first waterproof layer and the second waterproof layer both wrap the side wall of the roof rainwater outlet.
2. A roof dual protection double row waterproof structure as claimed in claim 1, characterized in that: A gap is arranged as a expansion joint between the second slope layer and the parapet wall, and between the roof waterproof protective layer near the end of the parapet wall and the second waterproof layer extending to the parapet wall.
3. A roof dual protection double row waterproof structure as claimed in claim 1, characterized in that: The first slope layer is made of C20 fine stone concrete pouring; the first waterproof layer is made of 1.5 thick single-layer high polymer wet-paved self-adhesive coiled material; and the second slope layer is made of light concrete pouring.
4. A roof dual protection double row waterproof structure as claimed in claim 1, characterized in that: If the height of the parapet wall is greater than or equal to 500 mm, the first waterproof layer extends upward by 150 mm near the end of the parapet wall, and the second waterproof layer extends upward by 500 mm near the end of the parapet wall.
5. A roof dual protection double row waterproof structure as claimed in claim 1, characterized in that: If the height of the parapet wall is between 150 mm and 500 mm, the first waterproof layer extends upward by 150 mm near the end of the parapet wall, and the second waterproof layer extends upward near the end of the parapet wall and then folds outward to the parapet wall.
6. A roof dual protection double row waterproof structure as claimed in claim 1, characterized in that: The roof waterproof protective layer comprises, from bottom to top, an isolation layer and a waterproof protective layer.
7. A roof dual protection double row waterproof structure as claimed in claim 6, characterized in that: The isolation layer is made of 0.8 mm wide geotechnical module splicing; and the waterproof protective layer is made of waterproof concrete pouring.
8. A roof dual protection double row waterproof structure as claimed in claim 7, characterized in that: The isolation layer splicing part is welded or glued.