Waterproof and breathable membrane construction technology

1. After selecting a good waterproof and breathable membrane, try to avoid penetration and opening on 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, welding of the curtain wall engineering connectors should be avoided as much as possible, and the open flame operation (including welding) should be arranged before the construction of the waterproof and breathable membrane. Open flames, welding or high temperature should be avoided on the membrane. Operation. If there are special needs, the film 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 up the dust and oil on the corners before construction to ensure that the corners are clean to ensure the bonding effect between the corners and the waterproof and breathable membrane. If it cannot be cleaned, the waterproof and breathable membrane and the base layer are not firm, which will affect the waterproof and breathable membrane 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 far as possible. The waterproof and breathable membrane is flooded to completely seal the corner code with the waterproof and breathable membrane. The sealing part and the corner code should be bonded by no less than 2cm.

4. When laying the waterproof and breathable membrane, according to the actual situation, you can choose to lay the loose paving method, and fix the waterproof and breathable membrane and the insulation wool with rock wool nails. The rock wool nails at the fixed place are sealed with butyl tape. Butyl tape completely covers the nail heads as standard.

5. During roof construction, the laying of the waterproof and breathable membrane should be along the water direction of the roof, with a lap length of 10cm. Wrap a butyl strip around it to seal. In addition, the waterproof and breathable membrane should not be exposed to ultraviolet rays for a long time, and the exterior finishing project should be completed as soon as possible.