What is the construction process of waterproof and breathable membrane

1. After selecting a good waterproof and breathable membrane, try to avoid penetrations and openings in the waterproof and breathable membrane during the construction process, and try to ensure the integrity of the waterproof and breathable membrane. If openings or penetrations are necessary, seal the penetrations and openings with butyl tape.

2. Since the waterproof and breathable membrane has no obvious flame retardant effect, we should try to avoid the use of welding on the curtain wall project connectors. Arrange open flame operations (including welding) before the construction of the waterproof and breathable membrane. Avoid open flames, welding or high temperatures on the membrane. Operation. If there are special needs, the membrane should be effectively shielded and heat insulation measures should be taken to prevent the material from being exposed to fire or high temperature.
3. Clean the dust and oil on the corner code before construction, and ensure that the corner code is clean to ensure the bonding effect between the corner code and the waterproof breathable membrane. If it cannot be cleaned, the waterproof breathable film and the base layer will not be firm, which will affect the waterproof breathable film. air tightness. Where the corner code passes through the waterproof and breathable membrane, the integrity of the waterproof and breathable membrane should be ensured as much as possible. The curve of the waterproof breathable membrane will be flooded to completely seal the corner code with the waterproof and breathable film. The bonding between the sealing part and the corner code shall not be less than 2cm.

4. When laying the waterproof and breathable membrane, you can choose the loose laying method according to the actual situation. Fix the waterproof breathable membrane and the thermal insulation cotton with rock wool nails. The rock wool nails at the fixed location are sealed with butyl tape. The area of the sealing area is Butyl tape completely covers the nail head as standard.

5. During roof construction, the waterproof and breathable membrane should be laid along the water direction of the roof, with an overlap length of 10cm. When the high-strength aluminum alloy bracket of the roof passes through the waterproof and breathable membrane, the intersection between the aluminum alloy bracket and the waterproof and breathable membrane should be Seal with butyl tape all around. In addition, the waterproof and breathable membrane should not be exposed to ultraviolet light for a long time, and the exterior facing project should be completed as soon as possible.