Roof waterproof structure and construction method thereof

Abstract

The invention relates to the technical field of waterproof construction, and discloses a roof waterproof structure and a construction method thereof.The roof waterproof structure comprises a roof, and a slope making layer, a waterproof coating layer, a waterproof roll layer, a heat preservation layer and a protection layer are sequentially and upwards arranged from the roof; a vent pipe with one end penetrating and extending to the outer side of the protective layer is arranged in the roof. By arranging the vent pipe, the vent pipe and the surrounding structure design of the vent pipe comprehensively consider multiple aspects such as waterproofness, air permeability and durability, the design measures not only improve the waterproof effect of the roof, but also enhance the adaptability and durability of the structure, powerful guarantee is provided for long-term stable operation of the roof, and the service life of the roof is prolonged. The problem of leakage at the joint of the pipe root of the vent pipe in traditional waterproof construction after long-term use is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof construction, in particular to a roof waterproof structure and a construction method thereof. Background Art

[0002] The roof is the outer protective structure of the top layer of the building. It is used to resist the influence of adverse factors such as rain, snow, wind, frost, solar radiation, temperature changes, etc. in nature, to ensure a good use environment inside the building. The roof should meet the functional requirements of being strong and durable, waterproof, heat-insulating, heat-insulating, fire-proof and able to resist various adverse influences.

[0003] At present, during the construction of roof waterproofing, after the air permeable pipe has been used for a long time, the waterproof material may age due to factors such as ultraviolet rays and temperature changes over time, or the structure may deform due to factors such as temperature changes and loads, resulting in cracks or looseness at the connection between the air permeable pipe and the waterproof layer, causing leakage problems at the pipe root connection. Summary of the invention

[0004] 1. Technical issues to be resolved The purpose of the present invention is to solve the problem that during the current roof waterproofing construction, after the ventilation pipe has been used for a long time, the waterproof material may age due to factors such as ultraviolet rays and temperature changes over time, or the structure may be deformed due to factors such as temperature changes and load effects, resulting in cracks or looseness at the connection between the ventilation pipe and the waterproof layer, causing leakage at the pipe root connection, and to propose a roof waterproofing structure and a construction method thereof.

[0005] (II) Technical solution The technical solution of the present invention to solve the above technical problems is as follows: A roof waterproof structure and a construction method thereof, comprising a roof, a slope leveling layer, a waterproof coating layer, a waterproof coiled material layer, a thermal insulation layer, and a protective layer arranged in sequence from the roof upwards, wherein a vent pipe having one end penetrating through and extending to the outside of the protective layer is arranged inside the roof.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Preferably, the slope leveling layer is C20 fine stone concrete with a slope of 3% and a thickness of 30 mm at the thinnest point.

[0008] The above technical solution has a slope of 3%, which is conducive to the drainage of the roof. The c20 fine stone concrete has a relatively fine surface after hardening, and the compressive strength should reach 20MPa. The above design not only meets the drainage requirements, but also ensures the strength and stability of the structure.

[0009] Preferably, the waterproof coating layer is a polyurethane waterproof coating with a coating thickness of 1.5 mm.

[0010] For the above technical solution, a coating thickness of 1.5 mm is a relatively reasonable choice, which can not only ensure the waterproof effect but also meet the construction requirements.

[0011] Preferably, the overlapping width of the long and short sides of the waterproof membrane layer is not less than 80mm, the seams of two adjacent membranes are staggered by more than 600MM, the edges of the membranes are closed, and after the construction and maintenance of the waterproof layer are completed, the water storage test time must not be less than 24 hours, and the water storage height must not be less than 30mm.

[0012] The above technical solution ensures that the connection between the rolls is tight, prevents moisture from penetrating from the overlap, avoids the formation of continuous leakage paths at the joints, improves the integrity and reliability of the waterproof layer, and closes the edges to prevent moisture from penetrating from the edges. The waterproof layer can still maintain good waterproof performance under long-term water pressure.

[0013] Preferably, a sleeve is provided on the outside of the air permeable tube, an expansion joint is left between the sleeve and the roof, a sealing material is embedded in the expansion joint, a coating is provided on the outside of the sealing material and the sleeve, a waterproof additional layer is provided on the outside of the coating, the top of the waterproof additional layer is painted with, a metal hoop is fixedly installed on the top of the sleeve, the gap between the sleeve and the air permeable tube is filled with asphalt hemp, a sealant is provided on the top of the gap, the caulking depth of the sealant is 15 mm, and a fine stone concrete protection width of 40 mm is provided on the outside of the sleeve.

[0014] The above technical scheme protects the vent pipe from direct erosion by the external environment and provides an additional waterproof barrier. The expansion joint adapts to the roof deformation caused by temperature changes, load changes and other factors. The sealing material can deform with the slight changes in the gap to maintain the sealing. The coating and additional layers can further enhance the waterproof effect. The metal hoops and asphalt hemp can provide good sealing effects. The sealant can maintain the sealing with the slight changes in the gap. The fine stone concrete protects the casing from direct erosion by the external environment.

[0015] Preferably, the waterproof layer should be inserted into the drain cup by no less than 50 mm. After the mortar solidifies, the rain shield should be sealed around with building sealant.

[0016] In the above technical solution, the waterproof layer should be attached to the drain cup by no less than 50mm to ensure a tight connection between the drain cup and the roof waterproof layer to prevent moisture from seeping in through the gap between the drain cup and the waterproof layer. By inserting the waterproof layer a certain distance into the drain cup, a continuous waterproof barrier can be formed to effectively prevent moisture penetration.

[0017] Preferably, after the insulation layer, roof insulation construction and roof waterproofing construction are completed, 85mm thick extruded polystyrene boards are dry-laid and fixed with glue, adjacent boards are staggered and spliced, and the gaps between the boards should be filled tightly with similar materials. After the insulation boards are laid, a layer of polyester fiber non-woven fabric is dry-laid, and the fabric surface must be flat and leave appropriate deformation allowance.

[0018] In the above technical solution, the 85mm thick extruded polystyrene board is designed to meet specific insulation needs. Dry laying can avoid various problems caused by wet operations, such as long drying time and easy cracking. Staggered splicing can avoid the gaps between the panels to form a continuous channel, thereby improving the integrity and waterproof performance of the insulation layer. The gaps between the panels are densely filled with similar materials to prevent the penetration of air and moisture, further improving the insulation and waterproof effects of the insulation layer. The polyester fiber non-woven fabric can effectively protect the insulation layer from damage by the external environment. The flat cloth surface can ensure its close fit with the insulation layer, and leaving a deformation margin can adapt to slight deformations of the roof, thereby improving the durability and stability of the protective layer.

[0019] Preferably, the protective layer, the roof protective layer construction, the roof concrete rigid protective layer, is equipped with a single-layer bidirectional steel bar with a diameter of 6.5@200, and the cast-in-place C20 concrete is 40mm thick. The separation joints are well reserved, and the vertical and horizontal spacing of the separation joints should not be greater than 6m*6m. The steel mesh is disconnected at the separation joints, and the concrete of the separation plates is poured at one time. After the construction of the concrete protective layer is completed, it is covered with a layer of plastic film. After the concrete is poured for 12-24 hours, it should be immediately wet-cured, and the curing time should not be less than 14 days. A steel mesh is first constructed in the drainage ditch, and then a 2.5 cement waterproof mortar protective layer is laid, and the slope is retained according to 1%.

[0020] In the above technical solution, the protective layer is used to protect the waterproof layer from damage by the external environment, such as ultraviolet rays, temperature changes, mechanical damage, etc. It is equipped with a steel mesh and a separation joint to ensure its overall performance and durability. The concrete of the separation plate should be poured at one time to avoid leakage problems caused by construction joints. It should be retained at a slope of 1% to ensure smooth drainage and prevent water accumulation.

[0021] Preferably, the following construction methods are included: S1. For the slope construction of roof construction, cement mortar is used to make the highest and lowest control points, and lines are drawn to find the slope and reinforce the ribs. At the same time, a height control line is drawn on the surrounding parapets using an ink fountain, and fine stone concrete is used for slope construction based on the control line and reinforcement.

[0022] S2. For the slope construction of the roof building, cement mortar is used to make the highest and lowest control points, and lines are drawn to find the slope and reinforce the ribs. At the same time, a height control line is popped out on the surrounding parapets using an ink fountain. According to the control line and reinforcement, C20 fine stone concrete is used for slope construction, with a slope of 3% and a thickness of 30mm at the thinnest point.

[0023] S3. Waterproof coating layer. During construction, apply polyurethane waterproof coating evenly in layers on the slope layer for multiple times. After each waterproof coating layer solidifies, apply the next coat.

[0024] S4. Waterproof membrane layer. When the coating solidifies, lay the waterproof membrane. First, lay the additional layer at the gutter of the parapet, and other additional layer locations such as stairwells and anti-slopes, and at the roots of roof ventilation pipes, downspouts, etc. After the additional layer is laid, pop up the baseline of each membrane section. The laying method should be parallel to the ridge from bottom to top, and the membrane and waterproof coating layer should be firmly adhered. Press with tools, and after one side is adhered, use the same method to lay and close the edges of the membrane.

[0025] S5. A casing must be set for the ventilation pipe passing through the roof, and an expansion joint must be left between the roof leveling layer. It must be filled with sealing materials and additional layers of coating and rolled waterproofing must be added. The upper waterproof layer of the pipe must be fastened with a metal hoop. The gaps between the ventilation pipes in the casing must be filled tightly with asphalt hemp, and the top must be caulked with sealant. Finally, the casing must be protected with fine stone concrete on all sides during molding.

[0026] S6. After the roof insulation construction and roof waterproofing construction are completed, dry-lay the extruded polystyrene board and fix it with glue. Adjacent boards should be staggered and spliced. The gaps between the boards should be filled tightly with similar materials. After the insulation board is laid, dry-lay a layer of polyester fiber non-woven fabric. The fabric surface should be flat and leave appropriate deformation allowance.

[0027] S7. Construction of roof protection layer, rigid protection layer of roof concrete, with single-layer bidirectional steel bars inside, cast-in-place C20 concrete, and well-prepared separation joints. The steel mesh is disconnected at the separation joints, and the casting thickness of the rigid waterproof layer is uniform. The concrete of each separation plate is cast in one time, and no construction joints shall be left. It shall be compacted and smoothed during pouring, and smoothed for the second time after initial setting. When smoothing and pressing, do not sprinkle water on the concrete surface, add cement slurry or spread dry cement to prevent construction cracks. After the construction of the concrete protection layer is completed, cover it with a layer of plastic film and carry out wet water maintenance after the concrete is poured.

[0028] (III) Beneficial effects Compared with the prior art, the technical solution of this application has the following beneficial technical effects: The present invention arranges a ventilation pipe, and the ventilation pipe and the surrounding structural design comprehensively consider multiple aspects such as waterproofness, air permeability and durability. These design measures not only improve the waterproof effect of the roof, but also enhance the adaptability and durability of the structure, provide a strong guarantee for the long-term stable operation of the roof, and effectively solve the leakage problem existing at the root connection of the ventilation pipe after long-term use in traditional waterproof construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a main structural cross-sectional view of the present invention; Figure 2 It is a cross-sectional view of the ventilation tube structure of the present invention.

[0030] In the figure: 1. Roof; 2. Slope leveling layer; 3. Waterproof coating layer; 4. Waterproof membrane layer; 5. Insulation layer; 6. Protective layer; 7. Air vent; 8. Casing; 9. Expansion joint; 10. Sealing material; 11. Coating; 12. Additional waterproof layer; 13. Metal hoop; 14. Asphalt hemp; 15. Sealant; 16. Fine stone concrete. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the embodiment, Figure 1-2 A roof waterproof structure and a construction method thereof are provided, comprising a roof 1, a slope leveling layer 2, a waterproof coating layer 3, a waterproof roll material layer 4, a thermal insulation layer 5, and a protective layer 6 arranged in sequence from the roof 1 upwards, and an air vent 7 with one end penetrating through and extending to the outside of the protective layer 6 is arranged inside the roof 1.

[0033] Reference Figure 1-2 The slope layer is C20 fine stone concrete with a slope of 3% and a thickness of 30 mm at the thinnest point; Through the above structural setting, by designing the slope to 3%, this slope is conducive to the drainage of the roof. The c20 fine stone concrete is characterized by good fluidity, easy construction, and a relatively fine surface after hardening. Under the standard curing of 28 days, the compressive strength of this concrete should reach 20MPa. The above design not only meets the drainage requirements, but also ensures the strength and stability of the structure.

[0034] Reference Figure 1-2 , wherein the waterproof coating layer is a polyurethane waterproof coating with a coating thickness of 1.5 mm; Through the above-mentioned structural setting, the polyurethane waterproof coating: it has excellent waterproof performance, weather resistance and chemical corrosion resistance, can form a tough and dense waterproof film, and effectively prevent water penetration. In addition, the polyurethane waterproof coating also has good adhesion and elasticity, and can adapt to the slight deformation of the building. The coating thickness is one of the important factors affecting the waterproof performance of the waterproof coating layer. If the coating thickness is too thin, it may lead to poor waterproof effect; if the coating thickness is too thick, it may increase the construction difficulty and cost. The coating thickness of 1.5mm is a relatively reasonable choice, which can not only ensure the waterproof effect, but also meet the construction requirements.

[0035] Reference Figure 1-2 Among them, the overlapping width of the long and short sides of the waterproofing membrane layer shall not be less than 80mm, the joints of two adjacent membranes shall be staggered by more than 600MM, and the edges of the membranes shall be closed. After the construction and maintenance of the waterproof layer, the water storage test time shall not be less than 24 hours, and the water storage height shall not be less than 30mm; Through the above-mentioned structural setting, the overlapping width of the long side and the short side of the waterproof membrane is not less than 80mm, which is to ensure the tight connection between the membranes and prevent moisture from penetrating from the overlapping joints. The joints of two adjacent membranes need to be staggered by more than 600mm. This requirement is to avoid the formation of continuous leakage paths at the joints and improve the integrity and reliability of the waterproof layer. The edges of the membranes need to be specially closed, which usually includes the use of sealing materials or special clamps to fix and seal the edges of the membranes to prevent moisture from penetrating from the edges. The test time shall not be less than 24 hours to ensure that the waterproof layer can still maintain good waterproof performance under long-term water pressure. The water storage height is not less than 30mm. This is to simulate the water level that may be encountered in actual use and to test the waterproof effect of the waterproof layer at this water level.

[0036] Reference Figure 1-2 , wherein, a casing is arranged on the outside of the vent pipe, an expansion joint is reserved between the casing and the roof, a sealing material is embedded in the expansion joint, a coating is arranged on the outside of the sealing material and the casing, a waterproof additional layer is arranged on the outside of the coating, the top of the waterproof additional layer is painted with, a metal hoop is fixedly installed on the top of the casing, the gap between the casing and the vent pipe is filled with asphalt hemp, a sealant is arranged on the top of the gap, the caulking depth of the sealant is 15mm, and a fine stone concrete protection width of 40mm is arranged on the outside of the casing; Through the above-mentioned structural setting, a sleeve is provided on the outside of the air vent to protect the air vent from direct erosion by the external environment and provide an additional waterproof barrier. An expansion joint is left between the sleeve and the roof to adapt to roof deformation caused by temperature changes, load changes and other factors and to prevent damage to the waterproof layer caused by deformation. The expansion joint is embedded with sealing materials, such as elastic sealant, which can deform with slight changes in the gap to maintain sealing. The coating and additional layers can further enhance the waterproof effect. The metal hoop on the top of the sleeve is used to fix the sleeve and prevent it from loosening or falling off. The gap is filled with asphalt hemp, which can provide a good sealing effect. The sealant with a depth of 15mm can maintain sealing with slight changes in the gap and ensure that the sealant can fully fill the gap and provide sufficient sealing effect. The fine stone concrete protection width is 40mm, which is to protect the sleeve from direct erosion by the external environment and provide additional mechanical strength.

[0037] Reference Figure 1-2 , among which, insulation layer 4, roof insulation construction, after the roof waterproofing construction is completed, dry-lay 85mm thick extruded polystyrene board and fix it with glue, adjacent panels are staggered and spliced, and the gaps between the panels should be filled with similar materials. After the insulation board is laid, dry-lay a layer of polyester fiber non-woven fabric, the fabric surface should be flat and leave appropriate deformation margin; Through the above structural setting, the extruded polystyrene board has the characteristics of high thermal resistance, low linear expansion rate, high compressive strength, etc. The 85mm thick extruded polystyrene board is designed to meet specific insulation needs. Dry laying is to place it directly on the base without using wet materials such as cement mortar during the laying process. This can avoid various problems caused by wet operations, such as long drying time and easy cracking. In order to ensure the stability of the extruded polystyrene board on the roof, it is necessary to use adhesive to fix it. When laying the extruded polystyrene board, the adjacent panels should be staggered to avoid the gaps between the panels to form a continuous channel, thereby improving the integrity and waterproof performance of the insulation layer. The gaps between the panels should be filled tightly with similar materials such as extruded polystyrene board scraps or special caulking materials. This can prevent the penetration of air and moisture and further improve the thermal insulation and waterproof effects of the insulation layer. After the insulation board is laid, a layer of polyester fiber non-woven fabric needs to be dry-laid as a protective layer. Polyester fiber non-woven fabric has good air permeability and anti-aging properties, and can effectively protect the insulation layer from damage by the external environment. The cloth surface needs to be flat and have an appropriate deformation allowance. The flat cloth surface can ensure a close fit between it and the insulation layer, and leaving a deformation allowance can adapt to slight deformations of the roof, thereby improving the durability and stability of the protective layer.

[0038] Reference Figure 1-2Among them, protective layer 5, roof protective layer construction, roof concrete rigid protective layer, with a single-layer bidirectional steel bar with a diameter of 6.5@200, cast-in-place C20 concrete 40mm thick, well-prepared separation joints, the vertical and horizontal spacing of the separation joints should not be greater than 6m*6m, the steel mesh is disconnected at the separation joints, and the concrete of the separation plates is poured at one time. After the construction of the concrete protective layer is completed, it is covered with a layer of plastic film. After the concrete is poured for 12-24 hours, it should be immediately wet-cured, and the curing time should not be less than 14 days. A steel mesh is first constructed in the drainage ditch, and then a 2.5 cement waterproof mortar protective layer is laid, and the slope is retained according to 1%.

[0039] Through the above-mentioned structural setting, the protective layer is used to protect the waterproof layer from damage by the external environment, such as ultraviolet rays, temperature changes, mechanical damage, etc. It is equipped with a steel mesh and a separation joint to ensure its overall performance and durability. The concrete of the separation plate should be poured at one time to avoid leakage problems caused by construction joints. It should be retained at a slope of 1% to ensure smooth drainage and prevent water accumulation.

[0040] Working principle: S1. For the slope construction of roof construction, cement mortar is used to make the highest and lowest control points, and lines are drawn to find the slope and reinforce the ribs. At the same time, a height control line is drawn on the surrounding parapets using an ink fountain, and fine stone concrete is used for slope construction based on the control line and reinforcement.

[0041] S2. For the slope construction of the roof building, cement mortar is used to make the highest and lowest control points, and lines are drawn to find the slope and reinforce the ribs. At the same time, a height control line is popped out on the surrounding parapets using an ink fountain. According to the control line and reinforcement, C20 fine stone concrete is used for slope construction, with a slope of 3% and a thickness of 30mm at the thinnest point.

[0042] S3. Waterproof coating layer. During construction, apply polyurethane waterproof coating evenly in layers on the slope layer for multiple times. After each waterproof coating layer solidifies, apply the next coat.

[0043] S4. Waterproof membrane layer. When the coating solidifies, lay the waterproof membrane. First, lay the additional layer at the gutter of the parapet, and other additional layer locations such as stairwells and anti-slopes, and at the roots of roof ventilation pipes, downspouts, etc. After the additional layer is laid, pop up the baseline of each membrane section. The laying method should be parallel to the ridge from bottom to top, and the membrane and waterproof coating layer should be firmly adhered. Press with tools, and after one side is adhered, use the same method to lay and close the edges of the membrane.

[0044] S5. A casing must be set for the ventilation pipe passing through the roof, and an expansion joint must be left between the roof leveling layer. It must be filled with sealing materials and additional layers of coating and rolled waterproofing must be added. The upper waterproof layer of the pipe must be fastened with a metal hoop. The gaps between the ventilation pipes in the casing must be filled tightly with asphalt hemp, and the top must be caulked with sealant. Finally, the casing must be protected with fine stone concrete on all sides during molding.

[0045] S6. After the roof insulation construction and roof waterproofing construction are completed, dry-lay the extruded polystyrene board and fix it with glue. Adjacent boards should be staggered and spliced. The gaps between the boards should be filled tightly with similar materials. After the insulation board is laid, dry-lay a layer of polyester fiber non-woven fabric. The fabric surface should be flat and leave appropriate deformation allowance.

[0046] S7. Construction of roof protection layer, rigid protection layer of roof concrete, with single-layer bidirectional steel bars inside, cast-in-place C20 concrete, and well-prepared separation joints. The steel mesh is disconnected at the separation joints, and the casting thickness of the rigid waterproof layer is uniform. The concrete of each separation plate is cast in one time, and no construction joints shall be left. It shall be compacted and smoothed during pouring, and smoothed for the second time after initial setting. When smoothing and pressing, do not sprinkle water on the concrete surface, add cement slurry or spread dry cement to prevent construction cracks. After the construction of the concrete protection layer is completed, cover it with a layer of plastic film and carry out wet water maintenance after the concrete is poured.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A roof waterproof structure and a construction method thereof, characterized in that: The invention comprises a roof (1), and is provided with a slope leveling layer (2), a waterproof coating layer (3), a waterproof coiled material layer (4), a thermal insulation layer (5), and a protective layer (6) in sequence from the roof (1) upwards. The roof (1) is provided with a vent pipe (7) having one end penetrating through and extending to the outside of the protective layer (6).

2. A roof waterproof structure and construction method thereof according to claim 1, characterized in that: The slope leveling layer (2) is C20 fine stone concrete with a slope of 3% and a thickness of 30 mm at the thinnest point.

3. A roof waterproof structure and construction method thereof according to claim 1, characterized in that: The waterproof coating layer (3) is a polyurethane waterproof coating, and its coating thickness is 1.5 mm.

4. A roof waterproof structure and construction method thereof according to claim 1, characterized in that: The overlapping width of the long and short sides of the waterproofing roll material layer (4) is not less than 80 mm, the joints of two adjacent roll materials are staggered by more than 600 mm, and the edges of the roll materials are closed. After the construction and maintenance of the waterproof layer are completed, a water storage test time must not be less than 24 hours, and the water storage height must not be less than 30 mm.

5. A roof waterproof structure and construction method thereof according to claim 1, characterized in that: A sleeve (8) is arranged on the outside of the ventilation tube (7), an expansion joint (9) is left between the sleeve (9) and the roof (1), a sealing material (10) is embedded in the expansion joint (9), a coating (11) is arranged on the outside of the sealing material (10) and the sleeve (8), a waterproof additional layer (12) is arranged on the outside of the coating (11), the top of the waterproof additional layer (12) is painted with, a metal hoop (13) is fixedly installed on the top of the sleeve (8), the gap between the sleeve (8) and the ventilation tube (7) is filled with asphalt hemp (14), a sealant (15) is arranged on the top of the gap, the caulking depth of the sealant (15) is 15 mm, and the outer side of the sleeve (8) is provided with fine stone concrete (16) with a protection width of 40 mm.

6. A roof waterproof structure and construction method thereof according to claim 1, characterized in that: The waterproof layer should not be less than 50mm into the drain cup. After the mortar solidifies, the rain guard should be sealed with building sealant.

7. A roof waterproof structure and construction method thereof according to claim 1, characterized in that: After the insulation layer (4) is constructed and the roof waterproofing is completed, an 85 mm thick extruded polystyrene board is dry-laid and fixed with adhesive. Adjacent boards are spliced ​​with staggered seams. The gaps between the boards should be filled tightly with similar materials. After the insulation board is laid, a layer of polyester fiber non-woven fabric is dry-laid. The fabric surface should be flat and have an appropriate deformation margin.

8. A roof waterproof structure and construction method thereof according to claim 1, characterized in that: The protective layer (5) is constructed by a roof protective layer, a rigid protective layer of concrete, with a single-layer bidirectional steel bar with a diameter of 6.5@200, and a cast-in-place C20 concrete with a thickness of 40 mm. The separation joints are well reserved, and the vertical and horizontal spacing of the separation joints should not be greater than 6m*6m. The steel mesh is disconnected at the separation joints, and the concrete of the separation plate is poured once. After the construction of the concrete protective layer is completed, a layer of plastic film is covered. After the concrete is poured for 12-24 hours, it should be immediately wet-cured. The curing time should not be less than 14 days. A steel mesh is first constructed in the drainage ditch, and then a 2.5 cement waterproof mortar protective layer is laid, and the slope is retained according to 1%.

9. A roof waterproof structure and construction method thereof according to claim 1, characterized in that: The following construction methods are included: S1. For the slope construction of roof construction, cement mortar is used to make the highest and lowest control points, and lines are drawn to find the slope and reinforce the ribs. At the same time, a height control line is drawn on the surrounding parapets using an ink fountain, and fine stone concrete is used for slope construction based on the control line and reinforcement. S2. For the slope construction of the roof building, cement mortar is used to make the highest and lowest control points, and lines are drawn to find the slope and reinforce the ribs. At the same time, a height control line is popped out on the surrounding parapets using an ink fountain. According to the control line and reinforcement, C20 fine stone concrete is used for slope construction, with a slope of 3% and a thickness of 30mm at the thinnest point. S3. Waterproof coating layer. During construction, apply polyurethane waterproof coating evenly in layers on the slope layer for multiple times. After each waterproof coating layer solidifies, apply the next coat. S4. Waterproof membrane layer. When the coating solidifies, lay the waterproof membrane. First, lay the additional layer at the gutter of the parapet, and other additional layer locations such as stairwells and anti-slopes, and at the roots of roof ventilation pipes, downspouts, etc. After the additional layer is laid, pop up the baseline of each membrane section. The laying method should be parallel to the ridge from bottom to top, and the membrane and waterproof coating layer should be firmly adhered. Press with tools, and after one side is adhered, use the same method to lay and close the edges of the membrane. S5. A casing must be set for the ventilation pipe passing through the roof, and an expansion joint must be left between the roof leveling layer. It must be filled with sealing materials and additional layers of coating and rolled waterproofing must be added. The upper waterproof layer of the pipe must be fastened with a metal hoop. The gaps between the ventilation pipes in the casing must be filled tightly with asphalt hemp, and the top must be caulked with sealant. Finally, the casing must be protected with fine stone concrete on all sides during molding. S6. After the roof insulation construction and roof waterproofing construction are completed, dry-lay the extruded polystyrene board and fix it with glue. Adjacent boards should be staggered and spliced. The gaps between the boards should be filled tightly with similar materials. After the insulation board is laid, dry-lay a layer of polyester fiber non-woven fabric. The fabric surface should be flat and leave appropriate deformation allowance. S7. Construction of roof protection layer, rigid protection layer of roof concrete, with single-layer bidirectional steel bars inside, cast-in-place C20 concrete, and well-prepared separation joints. The steel mesh is disconnected at the separation joints, and the casting thickness of the rigid waterproof layer is uniform. The concrete of each separation plate is cast in one time, and no construction joints shall be left. It shall be compacted and smoothed during pouring, and smoothed for the second time after initial setting. When smoothing and pressing, do not sprinkle water on the concrete surface, add cement slurry or spread dry cement to prevent construction cracks. After the construction of the concrete protection layer is completed, cover it with a layer of plastic film and carry out wet water maintenance after the concrete is poured.

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