Roof waterproof structure and construction method

Abstract

The application relates to a roof waterproof structure and a construction method, and belongs to the technical field of roof waterproofing. The roof waterproof structure comprises a supporting rod and a waterproof layer. The supporting rod is fixedly arranged on a combination layer. The length direction of the supporting rod is parallel to the length direction of a joint of the waterproof layer. The vertical section of the supporting rod is in an arc shape. The flat surface of the supporting rod is fixed on the combination layer. The joint of adjacent waterproof layers is located on the arc surface of the supporting rod. After the joint of the adjacent waterproof layers is overlapped, the joint is fixed on the arc surface of the supporting rod. The supporting rod is hollow and is provided with a closed end. The supporting rod is filled with a drying agent. The flat surface of the supporting rod is provided with a plurality of water absorption holes. The application has the effect of improving the waterproof performance of the roof.

Description

Technical Field

[0001] This application relates to the field of roof waterproofing technology, and in particular to a roof waterproofing structure and construction method. Background Technology

[0002] The roof refers to the surface of a building's roof, specifically the area between the ridge and the eaves. This part occupies a large area of ​​the roof, or in other words, the roof is the largest section of the roof. It generally includes a cast-in-place concrete floor, a cement mortar leveling layer, a thermal insulation layer, a waterproof layer, a cement mortar protective layer, a drainage system, parapet walls, and lightning protection measures. In special projects, the installation of roof tiles may also be involved.

[0003] Traditional roof waterproofing methods proceed from bottom to top as follows: roof structural layer → bonding layer → vapor barrier layer → insulation layer → slope-forming layer → fine aggregate concrete leveling layer → waterproof layer → protective layer. Because the insulation and slope-forming layers are mostly made of water-repellent materials, if the roof waterproofing layer is not applied promptly during the rainy season, rainwater can easily accumulate within these layers and cannot dry properly for extended periods. Even after the leveling layer is completed and the surface is dry under sunlight and wind, making waterproofing feasible, high summer temperatures can cause water to evaporate from the insulation and slope-forming layers, preventing proper drainage. This can lead to water vapor lifting and damaging the waterproofing joints, resulting in roof leaks. Summary of the Invention

[0004] To improve the waterproofing performance of roofs, this application provides a roof waterproofing structure and construction method.

[0005] Firstly, this application provides a roof waterproofing structure, which adopts the following technical solution: A roof waterproofing structure includes a support rod and a waterproof layer. The support rod is fixedly mounted on a bonding layer, with its length parallel to the length of the waterproof layer joints. The vertical cross-section of the support rod is arched, and its flat surface is fixed to the bonding layer. The joints of adjacent waterproof layers are all located on the arc surface of the support rod, and the overlapping joints of adjacent waterproof layers are fixed to the arc surface of the support rod. The support rod is hollow and closed at both ends, filled with a desiccant, and has multiple water absorption holes on its flat surface.

[0006] Optionally, the edges of the waterproof layer on both sides of the support rod extend past the highest point of the arc surface of the support rod and overlap the support rod or the waterproof layer.

[0007] Optionally, a ventilation pipe is provided inside the support rod. The length direction of the ventilation pipe is parallel to the length direction of the support rod, and both ends of the ventilation pipe extend out of the support rod. An air outlet is provided on the peripheral wall of the ventilation pipe, and an air inlet is provided at both ends of the ventilation pipe. The waterproof structure also includes an opening and closing component for sealing or opening the air inlet.

[0008] Optionally, the ventilation duct is bent into an L-shape on both sides toward the ground, and the air inlet is opened on the vertical pipe of the ventilation duct, with the axis of the air inlet perpendicular to the axis of the vertical pipe of the ventilation duct.

[0009] Optionally, the air inlet penetrates both sides of the ventilation duct and is symmetrical along the axis of the ventilation duct. The opening and closing device includes a plug head slidably disposed on the ventilation duct. The plug head is made of rubber and has a diameter larger than that of the air inlet. The plug head is slidably disposed on the ventilation duct through the air inlet, and the sliding direction of the plug head is parallel to the axial direction of the air inlet. The opening and closing device also includes an electric push rod disposed within the roof structure layer. The plug head is coaxially disposed on the output shaft of the electric push rod, and the length of the plug head is greater than that of the ventilation duct.

[0010] Optionally, the vertical pipe of the ventilation duct is wrapped with a sealing ring, and the sealing ring has a through hole corresponding to the air inlet. The diameter of the through hole is smaller than the diameter of the plug head. Both end faces of the sealing ring are inclined in the direction away from the sealing ring and are connected to the ventilation duct.

[0011] Optionally, the end of the plug used to insert into the air inlet is frustum-shaped, and the minimum diameter of the frustum is smaller than the diameter of the through hole and the air inlet.

[0012] Optionally, a fixing nail is provided on the arc surface of the support rod, the length of the fixing nail is less than the thickness of the waterproof layer, and the waterproof layers on both sides of the support rod are inserted into the fixing nail.

[0013] Optionally, the edge faces of the waterproof layers on both sides of the support rod are inclined upwards and face closer to the waterproof layer body. The waterproof layer that overlaps the upper waterproof layer overlaps the support rod after passing the inclined surface of the lower waterproof layer.

[0014] Secondly, this application provides a roof waterproofing construction method, which adopts the following technical solution: Optionally, a roof waterproofing construction method, using a roof waterproofing structure, further includes: S1: After the roof structure layer and bonding layer are completed, the waterproof layer is constructed; mark the position of the support rod on the bonding layer according to the width and overlap length of the waterproof layer. S2: Fix the support rod to the bonding layer, and then lay the waterproof layer. After the waterproof layer on one side of the support rod overlaps the support rod, the edge of the waterproof layer exceeds the highest point of the support rod. Then insert the waterproof layer into the fixing nail, and then carry out the construction of the other side of the waterproof layer. The edge of the other side of the waterproof layer near the support rod overlaps the top of the waterproof layer, and overlaps the support rod through the inclined surface of the waterproof layer, and is fixed to the support rod. S3: Then, the insulation layer, slope-finding layer, and leveling protective layer are constructed on the waterproof layer; S4: During the construction of the insulation layer, an arc-shaped groove is opened on the bottom surface of the insulation layer to fit the waterproof layer after it is lifted. The waterproof layer is then pressed onto the bottom surface of the insulation layer and into the arc-shaped groove to complete the roof construction.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. During roof construction, first mark the positions of the support rods on the bonding layer according to the width and overlap length of the waterproof layer. Then fix the support rods to the bonding layer. Next, lay the waterproof layer, with one side overlapping the support rods and the other side overlapping the waterproof layer, creating an arched overlap that faces away from the bonding layer. Then fix the waterproof layer, followed by the construction of the insulation layer, etc. This lifting operation at the joints of the waterproof layer reduces the possibility of water evaporation from the roof structure lifting the waterproof layer, thus reducing the possibility of damage to the waterproof layer joints. This design improves the waterproofing performance of the roof. Furthermore, when water accumulates in the roof structural layer and bonding layer and evaporates due to heat, the water vapor enters the support rod through the water absorption holes. The water vapor combines with the desiccant and is locked inside the desiccant, thereby reducing the possibility of water vapor lifting the waterproof layer and further improving the waterproofing effect of the roof. Additionally, the joints of the waterproof layer are located on the curved surface of the support rod. After rainwater penetrates to the joints of the waterproof layer, it flows along the curved surface of the waterproof layer, reducing the possibility of rainwater penetrating to the roof structural layer through the joints, further improving the waterproofing effect of the roof. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the roof structure according to an embodiment of this application; Figure 2 This is a schematic diagram of a roof waterproofing structure according to an embodiment of this application; Figure 3 This is a schematic diagram of the support rod and waterproof layer in a roof waterproofing structure according to an embodiment of this application; Figure 4 This is a schematic diagram of the fixing nail structure in a roof waterproofing structure according to an embodiment of this application; Figure 5 This is a cross-sectional view of the waterproof structure in a roof waterproof structure according to an embodiment of this application.

[0017] Explanation of reference numerals in the attached diagram: 1. Support rod; 2. Waterproof layer; 3. Bonding layer; 4. Water absorption hole; 5. Desiccant; 6. Ventilation duct; 7. Air outlet; 8. Air inlet; 9. Opening and closing components; 91. Plug head; 92. Electric push rod; 10. Roof structural layer; 11. Sealing ring; 12. Through hole; 13. Fixing nail; 14. Insulation layer. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0019] This application discloses a roof waterproofing structure. (Refer to...) Figure 1 , Figure 2 and Figure 3 The roof waterproofing structure includes a support rod 1 and a waterproof layer 2. The support rod 1 is made of stainless steel and has multiple joint grooves on its surface to increase the bonding force between the support rod 1 and the joint layer 3 and the upper insulation layer 14, thereby improving the roof forming quality. In this embodiment, the support rod 1 is fixedly installed on the joint layer 3. The length direction of the support rod 1 is parallel to the length direction of the joint of the waterproof layer 2. The vertical section of the support rod 1 is arched, and the flat surface of the support rod 1 is fixed on the joint layer 3. Reference Figure 4 and Figure 5 The joints of adjacent waterproof layers 2 are all located on the arc surface of support rod 1, and the joints of adjacent waterproof layers 2 are fixed on the arc surface of support rod 1 after overlapping.

[0020] After the roof structure layer 10 is completed, the position of the support rod 1 is planned on the bonding layer 3 according to the width and overlap length of the waterproof layer 2. Then the support rod 1 is fixed on the bonding layer 3. When laying the waterproof layer 2, the waterproof layer 2 along the length of the support rod 1 should be a complete waterproof strip to reduce the splicing seams of the waterproof layer 2. Then the waterproof layer 2 is laid on the bonding layer 3. When laying the waterproof layer 2, the edge of the waterproof layer 2 is fixed to the support rod 1. Then the other side of the waterproof layer 2 is fixed to the adjacent waterproof layer 2 to complete the construction at the splicing seam of the waterproof layer 2. After the waterproof layer 2 is completed, the construction of the insulation layer 14, etc. is carried out. After the water in the roof structure layer 10 evaporates, it enters the support rod 1 through the water absorption hole 4 and condenses into water droplets inside the support rod 1. After the water vapor enters the support rod 1, the possibility of water vapor rising to the joint of the waterproof layer 2 is reduced, thereby reducing the possibility of damage to the joint of the waterproof layer 2 and thus reducing the possibility of roof water leakage.

[0021] Reference Figure 4 and Figure 5Furthermore, to improve the adsorption effect on water vapor, the support rod 1 is hollow and closed at both ends. Multiple water absorption holes 4 are provided on the flat surface of the support rod 1. The support rod 1 is filled with a desiccant 5. In this embodiment, the desiccant 5 is silica gel desiccant 5. Silica gel desiccant 5 is suitable for dehumidification in various enclosed spaces, has strong moisture adsorption capacity, can be used for a long time, and the adsorbed moisture can be restored and reused by heating or drying. After water vapor enters the support rod 1 through the water absorption holes 4, it is adsorbed within the desiccant 5 under its action, further reducing the possibility of water vapor lifting the waterproof layer 2.

[0022] Reference Figure 3 To improve the waterproofing effect at the joint of the waterproof layer 2, the edges of the waterproof layer 2 on both sides of the support rod 1 extend beyond the highest point of the arc surface of the support rod 1 and overlap the support rod 1 or the waterproof layer 2. When rainwater penetrates to the surface of the waterproof layer 2, the rainwater flows along the arc surface of the waterproof layer 2, reducing the possibility of rainwater accumulating in the waterproof layer 2 for a long time, thereby improving the waterproofing effect at the joint of the waterproof layer 2. Furthermore, when rainwater penetrates to the top of the waterproof layer 2, the rainwater flows along the surface of the top waterproof cloth to the waterproof cloth on the other side, further reducing the possibility of rainwater penetrating to the joint of the waterproof cloth.

[0023] Reference Figure 4 and Figure 5 To facilitate the drying of the desiccant 5 inside the support rod 1, a ventilation pipe 6 is installed inside the support rod 1. The length direction of the ventilation pipe 6 is parallel to the length direction of the support rod 1, and both ends of the ventilation pipe 6 extend out of the support rod 1. An air outlet 7 is opened on the peripheral wall of the ventilation pipe 6, and the ventilation pipe 6 is connected to the inside of the support rod 1 through the air outlet 7. An air inlet 8 is opened at both ends of the ventilation pipe 6. When the ambient temperature is high and the humidity is low, the temperature of the insulation layer 14 and the waterproof layer 2 rises when the sunlight shines on the roof. The heat is transferred to the support rod 1, heating the desiccant 5 inside the support rod 1 to evaporate the moisture in the desiccant 5. The air in the environment enters the ventilation pipe 6 through the air inlet 8 on one side of the ventilation pipe 6 and flows inside the ventilation pipe 6. During the air flow, the evaporated moisture is carried away, thereby dehydrating the desiccant 5, so as to facilitate the reuse of the desiccant 5 in the future.

[0024] Reference Figure 4 and Figure 5 To facilitate air entry into the ventilation duct 6, the two sides of the ventilation duct 6 are bent into an L shape towards the ground. The air inlet 8 is opened on the vertical pipe of the ventilation duct 6, and the axis of the air inlet 8 is perpendicular to the axis of the vertical pipe of the ventilation duct 6. The air inlet 8 is located on the vertical pipe of the ventilation duct 6, which is more convenient for air to flow into the ventilation duct 6 than the air inlet 8 is opened at the end of the ventilation duct 6.

[0025] Reference Figure 4 and Figure 5When the ambient humidity is high, to reduce the amount of moisture in the air entering the desiccant 5, the waterproof structure also includes an opening / closing element 9 for sealing or opening the air inlet 8. The air inlet 8 penetrates both sides of the ventilation duct 6 and is symmetrical along the axis of the ventilation duct 6. The opening / closing element 9 includes a plug head 91 slidably mounted on the ventilation duct 6. The plug head 91 is made of rubber and its diameter is larger than the diameter of the air inlet 8. The plug head 91 is slidably mounted on the ventilation duct 6 through the air inlet 8, and the sliding direction of the plug head 91 is parallel to the axial direction of the air inlet 8. The opening / closing element 9 also includes an electric push rod 92 installed in the roof structure layer 10, and the plug head 91 is coaxially mounted. The plug head 91, positioned on the output shaft of the electric push rod 92, has a length greater than the diameter of the ventilation duct 6. When the air inlet 8 is opened or closed, the electric push rod 92 is activated, causing the plug head 91 to move within the air inlet 8. Once the plug head 91 enters the ventilation duct 6 from one side of the air inlet 8, the air inlet 8 is opened, allowing ambient air to enter the ventilation duct 6, thus causing airflow within the ventilation duct 6 to carry out moisture from the desiccant 5. When the plug head 91 spans two air inlets 8, the air inlets 8 are closed, isolating the external environment and reducing the possibility of external moisture entering the ventilation duct 6.

[0026] Reference Figure 4 and Figure 5 To further improve the sealing performance of the air inlet 8, the vertical pipe of the ventilation pipe 6 is wrapped with a sealing ring 11. The sealing ring 11 is fixed on the vertical pipe, and a through hole 12 corresponding to the air inlet 8 is opened on the sealing ring 11. The diameter of the through hole 12 is smaller than the diameter of the plug head 91. Under the action of the sealing ring 11, the edge of the air inlet 8 is covered, reducing the possibility of rainwater in the environment penetrating into the air inlet 8.

[0027] Reference Figure 4 and Figure 5 Furthermore, both end faces of the sealing ring 11 are inclined in the direction away from the sealing ring 11 and connected to the ventilation pipe 6; the two ends of the sealing ring 11 are inclined so that the rainwater flowing along the ventilation pipe 6 can flow along the inclined surface of the sealing ring 11 to the surface of the sealing ring 11, thereby allowing the rainwater to be discharged quickly from the sealing ring 11, so as to reduce the possibility of rainwater penetrating into the ventilation pipe 6.

[0028] Reference Figure 4 and Figure 5 To facilitate the opening and closing of the air inlet 8 by the plug head 91, the end of the plug head 91 used to insert into the air inlet 8 is shaped like a frustum, and the minimum diameter of the frustum is smaller than the diameter of the through hole 12 and the air inlet 8.

[0029] Reference Figure 3 and Figure 4Fixing nails 13 are provided on the arc surface of the support rod 1. The length of the fixing nails 13 is less than the thickness of the waterproof layer 2. The waterproof layers 2 on both sides of the support rod 1 are inserted into the fixing nails 13. When the waterproof layer 2 overlaps the support rod 1, the waterproof layer 2 is inserted into the fixing nails 13 to fix the waterproof layer 2 to the support rod 1, reducing the possibility of the waterproof layer 2 shifting position when the insulation layer 14 is laid. Furthermore, after the fixing nails 13 enter the waterproof layer 2, the fixing nails 13 act as a supporting skeleton within the waterproof layer 2, reducing the possibility of deformation, lifting, or bending of the waterproof layer 2, thereby improving the waterproof effect of the waterproof layer 2.

[0030] Reference Figure 3 To facilitate the overlap of the waterproof layer 2 on the support rod 1 and adjacent waterproof layers 2, the end faces of the edges of the waterproof layers 2 on both sides of the support rod 1 are inclined upwards and facing the direction closer to the body of the waterproof layer 2. The waterproof layer 2 that overlaps the upper waterproof layer 2 overlaps the support rod 1 after passing the inclined surface of the lower waterproof layer 2. The edge of the waterproof layer 2 is inclined, which makes it easier for the adjacent waterproof layer 2 to be laid on the bonding layer 3 along the inclined surface, thereby reducing the possibility of abrupt changes in the flatness of the waterproof layer 2.

[0031] The implementation principle of a roof waterproofing structure according to an embodiment of this application is as follows: After the roof structure layer 10 is completed, the position of the support rod 1 is planned on the bonding layer 3 according to the width and overlap length of the waterproof layer 2. Then the support rod 1 is fixed on the bonding layer 3. When laying the waterproof layer 2, the waterproof layer 2 along the length of the support rod 1 should be a complete waterproof strip to reduce the splicing seams of the waterproof layer 2. Then the waterproof layer 2 is laid on the bonding layer 3. When laying the waterproof layer 2, the edge of the waterproof layer 2 is fixed to the support rod 1. Then the waterproof layer 2 on the other side is fixed to the adjacent waterproof layer 2 to complete the construction of the splicing seam of the waterproof layer 2. After the waterproof layer 2 is completed, the construction of the insulation layer 14 and so on is carried out.

[0032] This application discloses a roof waterproofing construction method, referring to... Figure 1 The roof waterproofing construction method utilizes the roof waterproofing structure and also includes: S1: After the roof structure layer 10 and the bonding layer 3 are completed, the waterproof layer 2 is constructed; the position of the support rod 1 is marked on the bonding layer 3 according to the width and overlap length of the waterproof layer 2. S2: Fix the support rod 1 to the bonding layer 3, and then lay the waterproof layer 2. After the waterproof layer 2 on one side of the support rod 1 overlaps the support rod 1, the edge of the waterproof layer 2 exceeds the highest point of the support rod 1. Then insert the waterproof layer 2 into the fixing nail 13, and then carry out the construction of the other side of the waterproof layer 2. The edge of the other side of the waterproof layer 2 near the support rod 1 overlaps the top of the waterproof layer 2, and overlaps the support rod 1 through the inclined surface of the waterproof layer 2, and is fixed to the support rod 1. S3: Then, on the waterproof layer 2, construct the insulation layer 14, the slope layer, and the leveling protective layer; S4: During the construction of the insulation layer 14, an arc-shaped groove is opened on the bottom surface of the insulation layer 14 to fit the waterproof layer 2 after it is lifted. The waterproof layer 2 is pressed onto the bottom surface of the insulation layer 14 and into the arc-shaped groove to complete the roof construction.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A roof waterproofing structure, characterized in that: The device includes a support rod (1) and a waterproof layer (2). The support rod (1) is fixedly mounted on the bonding layer (3). The length direction of the support rod (1) is parallel to the length direction of the joint of the waterproof layer (2). The vertical section of the support rod (1) is arched. The flat surface of the support rod (1) is fixed on the bonding layer (3). The joints of adjacent waterproof layers (2) are all located on the arc surface of the support rod (1). After the joints of adjacent waterproof layers (2) are overlapped, they are fixed on the arc surface of the support rod (1). The support rod (1) is hollow and closed at both ends. The support rod (1) is filled with a desiccant (5). The flat surface of the support rod (1) has multiple water absorption holes (4).

2. The roof waterproofing structure according to claim 1, characterized in that: The edges of the waterproof layer (2) on both sides of the support rod (1) extend past the highest point of the arc surface of the support rod (1) and overlap the support rod (1) or the waterproof layer (2).

3. The roof waterproofing structure according to claim 1, characterized in that: A ventilation pipe (6) is provided inside the support rod (1). The length direction of the ventilation pipe (6) is parallel to the length direction of the support rod (1), and both ends of the ventilation pipe (6) extend out of the support rod (1). An air outlet (7) is provided on the peripheral wall of the ventilation pipe (6), and an air inlet (8) is provided at both ends of the ventilation pipe (6). The waterproof structure also includes an opening and closing component (9) for sealing or opening the air inlet (8).

4. A roof waterproofing structure according to claim 3, characterized in that: The ventilation pipe (6) is bent into an L shape on both sides toward the ground. The air inlet (8) is opened on the vertical pipe of the ventilation pipe (6), and the axial direction of the air inlet (8) is perpendicular to the axis of the vertical pipe of the ventilation pipe (6).

5. A roof waterproofing structure according to claim 4, characterized in that: The air inlet (8) penetrates both sides of the ventilation pipe (6) and is symmetrical along the axis of the ventilation pipe (6). The opening and closing device (9) includes a plug (91) slidably disposed on the ventilation pipe (6). The plug (91) is made of rubber and its diameter is larger than that of the air inlet (8). The plug (91) is slidably disposed on the ventilation pipe (6) through the air inlet (8). The sliding direction of the plug (91) is parallel to the axis of the air inlet (8). The opening and closing device (9) also includes an electric push rod (92) disposed in the roof structure layer (10). The plug (91) is coaxially disposed on the output shaft of the electric push rod (92). The length of the plug (91) is larger than that of the ventilation pipe (6).

6. A roof waterproofing structure according to claim 5, characterized in that: The vertical pipe of the ventilation pipe (6) is wrapped with a sealing ring (11). The sealing ring (11) has a through hole (12) corresponding to the air inlet (8). The diameter of the through hole (12) is smaller than the diameter of the plug head (91). Both end faces of the sealing ring (11) are inclined in the direction away from the sealing ring (11) and are connected to the ventilation pipe (6).

7. A roof waterproofing structure according to claim 6, characterized in that: The plug (91) is inserted into the air inlet (8) at a frustum-shaped end, and the minimum diameter of the frustum is smaller than the diameter of the through hole (12) and the air inlet (8).

8. A roof waterproofing structure according to claim 1, characterized in that: The support rod (1) has a fixing nail (13) on its arc surface. The length of the fixing nail (13) is less than the thickness of the waterproof layer (2). The waterproof layers (2) on both sides of the support rod (1) are inserted into the fixing nail (13).

9. A roof waterproofing structure according to claim 8, characterized in that: The edge faces of the waterproof layers (2) on both sides of the support rod (1) are inclined upwards and are close to the body of the waterproof layer (2). The waterproof layer (2) that overlaps the upper part of the waterproof layer (2) overlaps the support rod (1) after passing the inclined surface of the lower waterproof layer (2).

10. A method for waterproofing roofs, characterized in that: Using the roof waterproofing structure as described in claim 9, it further includes: S1: After the roof structure layer (10) and the bonding layer (3) are completed, the waterproof layer (2) is constructed; the position of the support rod (1) is marked on the bonding layer (3) according to the width and overlap length of the waterproof layer (2); S2: Fix the support rod (1) on the bonding layer (3), and then lay the waterproof layer (2). After the waterproof layer (2) on one side of the support rod (1) overlaps on the support rod (1), the edge of the waterproof layer (2) exceeds the highest point of the support rod (1). Then insert the waterproof layer (2) into the fixing nail (13), and then carry out the construction of the other side of the waterproof layer (2). The edge of the other side of the waterproof layer (2) near the support rod (1) overlaps on the top of the waterproof layer (2), and overlaps on the support rod (1) through the inclined surface of the waterproof layer (2), and is fixed on the support rod (1). S3: Then, on the waterproof layer (2), the insulation layer (14), the slope layer, and the leveling protective layer are constructed; S4: When constructing the insulation layer (14), an arc-shaped groove is opened on the bottom surface of the insulation layer (14) to accommodate the waterproof layer (2) after it is lifted. The waterproof layer (2) is pressed onto the bottom surface of the insulation layer (14) and the arc-shaped groove to complete the roof construction.

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