Double-layer felt PE film composite waterproof process

Abstract

The invention belongs to the field of waterproof processes, and provides a double-layer felt PE film composite waterproof process which comprises a first layer of cement glue, a first layer of felt, a PO film, a second layer of felt and a second layer of cement glue. The composite waterproof layer is formed by using the two layers of felt structures and the PE film in cooperation with the cement glue, the advantage of being low in material use cost is achieved, in the construction process of the composite waterproof layer, only a spray gun, a roller, a steel nail and other basic tools are used, construction is more convenient, the construction technology is simpler and more effective, meanwhile, high-temperature curing and other operations are not needed, and the construction cost is reduced. The composite waterproof layer can be naturally dried to complete construction in a normal-temperature environment, can be used in a low-temperature environment in winter and different base layers such as color steel tiles, tiles and concrete without dismantling an original roof, and only needs to be brushed with cement glue and repair of the felt layer and the PE film when the composite waterproof layer locally leaks, and does not need to be integrally dismantled; therefore, the composite waterproof layer has the advantages of being low in construction cost and higher in construction adaptability.

Description

Technical Field

[0001] The invention belongs to the field of waterproofing technology, in particular to a double-layer felt PE film composite waterproofing technology. Background Art

[0002] Roof waterproofing is a crucial step in construction projects. It aims to prevent rainwater, snowwater and other external water sources from penetrating into the building, ensuring the stability of the building structure and the comfort of the indoor environment. Regular inspection and maintenance of the roof waterproofing layer can detect and address leakage problems in a timely manner and extend the service life of the waterproofing layer.

[0003] However, traditional SBS membranes, waterproof coatings or asphalt waterproofing layers require complex processes for high-temperature curing, resulting in long construction periods and high labor and material costs. This is especially difficult to operate when constructing on irregular roofs such as color-coated steel tiles and tiled houses. Conventional waterproofing layers are prone to leakage due to temperature differences, ultraviolet aging or cracking of the base layer, and need to be completely dismantled for maintenance, resulting in high costs and long construction times.

[0004] To this end, those skilled in the art have proposed a double-layer felt PE film composite waterproofing process to solve the problems raised in the background technology. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a double-layer felt PE membrane composite waterproofing process to solve the problems of complex construction of the waterproof layer and difficult subsequent maintenance in the prior art.

[0006] A double-layer felt PE film composite waterproofing process includes the following steps:

[0007] Step 1: Clean the base layer. Clean the construction surface of the roof where the waterproof layer is laid, and clean up the debris, oil stains, and loose objects to keep the roof waterproof layer flat and tidy.

[0008] Step 2: Spray the first layer of cement glue by using a spray gun or spraying machine to spray the cement glue on the construction surface of the roof waterproof layer. The cement glue spraying thickness is 2mm, so that the edges and corners of the roof waterproof layer construction surface are evenly sprayed with cement glue.

[0009] Step three, laying the composite waterproof layer, first laying the first layer of felt, laying the 5mm thick felt flat on the construction surface of the roof waterproof layer, and located on the cement glue covering layer sprayed in step two, the overlap at the edges of the felt is greater than or equal to 10cm, and is fixed with steel nails or cement glue dots; then laying PE film, laying a 0.15mm thick PE film on the first layer of felt, aligning the edge of the PE film with the edge of the first layer of felt, and sealing the seam with tape; finally, laying the second layer of felt, laying a 5mm thick second layer of felt on the PE film, and staggering the seams of the second layer of felt and the first layer of felt, and the overlap at the edge of the second layer of felt is also greater than or equal to 10cm, and is fixed with steel nails or cement glue dots;

[0010] Step 4: Spray the second layer of cement glue. Use a spray gun or spray machine to evenly spray the cement glue on the surface of the first layer of felt, PE film and the second layer of felt. The thickness of the second layer of cement glue is 2-3mm, and the second layer of cement glue completely covers the gaps in the felt.

[0011] Step 5: Maintenance and acceptance. After the construction of the first layer of felt, PE film and the second layer of felt composite layer, as well as the first layer of cement glue and the second layer of cement glue is completed, naturally maintain for 10-30 hours. Avoid trampling and water accumulation during the maintenance period. After 5-7 days, check the surface flatness of the composite waterproof layer and whether there are cracks, as well as check the integrity of the PE film.

[0012] Preferably, in step 2 and step 4, the material ratio of the first layer of cement glue and the second layer of cement glue is cement: water: glue, with a weight ratio of 100:150:0.5.

[0013] Preferably, the PE film in step three and step four can be replaced by a PO film.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention forms a composite waterproof layer by using a two-layer felt structure and a PE film in combination with cement glue, which has the advantage of low material usage cost. In the construction process of the composite waterproof layer, only basic tools such as spray guns, rollers, and steel nails are used, making the construction more convenient, the construction process simpler and more effective, and the labor cost lower. At the same time, no high-temperature curing and other operations are required, and the construction can be completed by natural drying at room temperature. In the low temperature environment in winter, and on different base layers such as color steel tiles, tiles, and concrete, it is not necessary to dismantle the original roof. In addition, when the composite waterproof layer leaks locally, it is only necessary to apply cement glue and repair the felt layer and PE film, without the need to dismantle the entire layer. This makes the composite waterproof layer have the advantages of low construction cost and stronger construction adaptability.

[0016] 2. The present invention sets a waterproof layer with a multi-layer composite structure. The felt layer has a low water absorption rate and can absorb cement glue to form a closed-cell structure, thereby enhancing pressure resistance and crack resistance. The PE film can completely block the water vapor penetration path, and it can still be waterproof even if the felt is partially damaged. The cement glue layer can form a rigid protective layer after hardening, which is wind-resistant and aging-resistant, with a service life of 10-15 years. The PE film is resistant to ultraviolet rays and acid and alkali, and the cement layer has excellent freeze-thaw resistance and is adaptable to areas with large temperature differences. Therefore, the composite waterproof layer has better protection effect and can adapt to a variety of environments with large temperature differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a construction flow chart of the waterproofing process of the present invention. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0019] Example:

[0020] As attached Figure 1 As shown:

[0021] The present invention provides a double-layer felt PE film composite waterproofing process, comprising the following steps:

[0022] Step 1: Clean the base layer. Clean the construction surface of the roof where the waterproof layer is laid, and remove any debris, oil stains, and loose objects. Keep the roof waterproof layer flat and tidy, so that the waterproof layer can be more easily attached to the construction surface of the roof waterproof layer. This can also prevent debris from affecting the coverage of the waterproof layer, thereby improving the adhesion of the waterproof layer and optimizing the waterproof effect of the waterproof layer.

[0023] Step 2: Spray the first layer of cement glue by using a spray gun or spraying machine to spray the cement glue on the construction surface of the roof waterproof layer. The cement glue spraying thickness is 2mm, so that the edges and corners of the roof waterproof layer construction surface are evenly sprayed with cement glue.

[0024] Step 3: Lay the composite waterproof layer. First, lay the first layer of felt. Lay the 5mm thick felt flat on the construction surface of the roof waterproof layer and on the cement glue covering layer sprayed in step 2. The overlap of the felt edges is greater than or equal to 10cm, and it is fixed with steel nails or cement glue dots to achieve the effect of full coverage of the roof waterproof layer construction surface. The edges are also in a fixed state and will not warp. Then lay the PE film. Lay a 0.15mm thick PE film on the first layer of felt. Align the edges of the PE film with the edges of the first layer of felt and seal the seams with tape. The PE film can isolate water vapor and block the leakage path. Increase the sealing of the composite waterproof layer and improve the waterproof effect. The PE film can be replaced with a PO film, making the PE film replaceable and improving the convenience of selecting construction materials for the composite waterproof layer. Finally, lay the second layer of felt. Lay a 5mm thick second layer of felt on the PE film, and stagger the joints between the second layer of felt and the first layer of felt. The overlap at the edge of the second layer of felt is also greater than or equal to 10cm. Use steel nails or cement glue to fix them in dots. The staggered paving structure at the joints can ensure that the joints between the first layer of felt and the second layer of felt are covered and paved, thereby avoiding the problem of alignment leakage at the joints.

[0025] Step 4: Spray the second layer of cement glue. Use a spray gun or spray machine to evenly spray the cement glue on the surface of the first layer of felt, PE film and the second layer of felt. The thickness of the second layer of cement glue is 2-3mm, and the second layer of cement glue completely covers the gaps in the felt.

[0026] Step 5: Curing and acceptance: After the construction of the first layer of felt, the PE film and the second layer of felt composite layer, and the first layer of cement glue and the second layer of cement glue is completed, naturally cure for 10-30 hours. Avoid trampling and water accumulation during the curing period.

[0027] After 5-7 days, check the surface flatness of the composite waterproof layer and whether there are any cracks, as well as the integrity of the PE film.

[0028] refer to Figure 1 The material ratio of the first layer of cement glue and the second layer of cement glue is cement: water: glue, and the weight ratio is 100:150:0.5. For example, 100 kg of cement is mixed with 150 kg of water and 0.5 kg of glue. The glue can be selected from construction glue and PVA, etc., which can form a high-strength bonding layer after curing, and has the effect of increasing waterproofness;

[0029] At the same time, according to the construction conditions at the construction site, an appropriate amount of fiber material can be added to the first layer of cement glue and the second layer of cement glue, so that the fiber material forms a three-dimensional network structure in the cement glue. When microcracks occur in the matrix, the fibers can span the cracks and bear tensile stress, limiting the expansion of the cracks. The addition of fiber material can significantly reduce the cracks generated in the cement glue during drying, shrinkage or temperature changes, thereby improving the overall crack resistance of the material. Secondly, the fiber material can be selected from glass fiber, polypropylene PP, etc.

[0030] refer to Figure 1 The first layer of felt and the second layer of felt can be selected as 5mm thick needle-punched non-woven felt, which has the function of absorbing cement glue, forming a closed-cell structure, and improving pressure resistance and waterproofness.

[0031] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0032] A few final points should be made:

[0033] First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0034] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0035] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

[0036] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A double-layer felt PE film composite waterproofing process, characterized in that: The steps include: Step 1: Clean the base layer. Clean the construction surface of the roof where the waterproof layer is laid, and clean up the debris, oil stains, and loose objects to keep the roof waterproof layer flat and tidy. Step 2: Spray the first layer of cement glue by using a spray gun or spraying machine to spray the cement glue on the construction surface of the roof waterproof layer. The cement glue spraying thickness is 2mm, so that the edges and corners of the roof waterproof layer construction surface are evenly sprayed with cement glue. Step 3: Lay the composite waterproof layer. First, lay the first layer of felt. Lay the 5mm thick felt flat on the construction surface of the roof waterproof layer and on the cement glue cover sprayed in step 2. The overlap at the edge of the felt is greater than or equal to 10cm and fixed with steel nails or cement glue dots; Then lay the PE film, lay a 0.15mm thick PE film flat on the first layer of felt, align the edge of the PE film with the edge of the first layer of felt, and seal the seam with tape; Finally, lay the second layer of felt. Lay a 5mm thick second layer of felt on the PE film, and stagger the seams between the second layer of felt and the first layer of felt. The overlap at the edge of the second layer of felt should also be greater than or equal to 10cm. Fix it with steel nails or cement glue dots. Step 4: Spray the second layer of cement glue. Use a spray gun or spray machine to evenly spray the cement glue on the surface of the first layer of felt, PE film and the second layer of felt. The thickness of the second layer of cement glue is 2-3mm, and the second layer of cement glue completely covers the gaps in the felt. Step 5: Curing and acceptance: After the construction of the first layer of felt, the PE film and the second layer of felt composite layer, and the first layer of cement glue and the second layer of cement glue is completed, naturally cure for 10-30 hours. Avoid trampling and water accumulation during the curing period. After 5-7 days, check the surface flatness of the composite waterproof layer and whether there are any cracks, as well as the integrity of the PE film.

2. A double-layer felt PE film composite waterproofing process as claimed in claim 1, characterized in that: In step 2 and step 4, the material ratio of the first layer of cement glue and the second layer of cement glue is cement: water: glue, which is 100:150:0.5 by weight.

3. A double-layer felt PE film composite waterproofing process as claimed in claim 1, characterized in that: The PE film in steps 3 and 4 can be replaced by a PO film.

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