PVC/TPO waterproofing membrane construction process

1. TPO waterproofing membrane is a thermoplastic polyolefin waterproofing membrane.

It is a new waterproofing membrane made of thermoplastic polyolefin (TPO) synthetic resin that combines ethylene propylene rubber and polypropylene using advanced polymerization technology, and is added with antioxidants, anti-aging agents, and softeners. It can be made into an enhanced waterproofing membrane with polyester fiber mesh cloth as internal reinforcement material. It belongs to the waterproofing product of synthetic polymer waterproofing membrane.

TPO waterproofing membrane combines the performance advantages of EPDM and PVC, with the weather resistance and low temperature gentleness of the former and the weldability of the latter. This material is different from traditional plastics. It shows high elasticity of rubber at room temperature and can be formed like plastic at high temperature.

Therefore, this material has good processing performance and mechanical properties, and has high-strength welding performance.

After adding a layer of polyester fiber fabric between the two layers of TPO material, its physical properties, fracture strength, fatigue resistance, and puncture resistance can be enhanced.

In practical applications, this product has the comprehensive characteristics of anti-aging, high tensile strength, high elongation, construction on wet roofs, no need for protective layer for exposure, convenient construction, and no pollution. It is very suitable as a waterproof layer for light energy-saving roofs.

2. PVC waterproofing membrane is polyester fiber reinforced polyvinyl chloride (PVC).

Waterproofing membrane is a thermoplastic PVC membrane. The membrane uses polyester fiber fabric as reinforcement. Through a special extrusion coating process, the double-sided polyvinyl chloride plastic layer and the middle polyester reinforcement are combined into one to form a polymer membrane.

The advanced polyvinyl chloride plastic layer combined with the mesh structure of polyester fiber fabric gives the membrane excellent dimensional stability and low thermal expansion coefficient.

Improve the long-term performance of the membrane directly exposed to the natural environment. Construction method: hot air welding, so as to ensure the effect of the weld.

1. PVC waterproofing membrane has high tensile strength, good elongation, and small thermal dimensional change rate.

2. It has good weldability, and the seam becomes one with the parent material after hot air welding.

3. It has good water vapor diffusion, condensate is easy to release, and moisture and humidity left in the base are easy to discharge.

4. It is resistant to aging, UV radiation, chemical corrosion, and root penetration.

5. It has good flexibility at low temperature (-20℃).

6. It has a long service life (25 years on the roof and more than 50 years underground) and no environmental pollution.

7. The colored surface reflects UV radiation, and the surface of the PVC waterproofing membrane absorbs less heat and has a low temperature.

8. Excellent flexibility and stretchability, high tensile strength, excellent dimensional stability, high mechanical strength, erosion resistance, root penetration resistance, weather resistance, UV resistance, and hail resistance.

Construction process

1. Clean the base

The base needs to be flat, and the rock wool board needs to meet the density and strength requirements.

The surface layer requires no garbage, debris and sharp objects, and is fixed with a special rock wool sleeve.

2. Test welding of the coil

Before construction, test welding of the coil is required according to local climatic conditions.

Determine the best welding temperature and welding speed, and the welding is required to reach a molten bite state.

3. Laying the coiled material

The coiled material is required to overlap along the water. It needs to be left still for a period of time before welding to release the stress of the coiled material.

For large-surface coiled materials, an automatic hot air welder can be used for welding, with a welding width of 40mm and an effective welding width of not less than 25mm.

The coiled material is fixed at 50mm along the edge of the coiled material, and the spacing is in accordance with the design requirements. The sleeve is covered with a waterproof layer.

4. Detailed node processing

To ensure the quality of welding, the welding nozzle needs to be cleaned, and the welding nozzle can be cleaned with an iron brush.

The corners, pipe roots, water outlets, skylights and T-shaped overlaps should be treated with emphasis. The welding parts of the material should be kept clean. If contaminated, cotton cloth dipped in anhydrous alcohol can be used to clean it before welding.

5. Inspection and acceptance

When the construction is completed, the inspection hook is required to inspect and accept the overlapped parts. There should be no leakage, skipped welding and weld burn. If any problems are found, reinforcement treatment can be carried out.