SBS APP Modified Bitumen Waterproof Membrane 2.0mm 3mm 3.8mm 4mm Thick Building Material

Building Material Roof SBS APP Modified Bitumen Waterproof Membrane

Precautions for waterproof membrane construction

Requirements for surface treatment

1. Dryness control

• The moisture content of the base layer is ≤10%, which can pass the simple test of "1㎡ roll material covered for 3-4 hours without watermark".
• Moisture-curing adhesive or interface isolation agent should be used for wet base surfaces.

2. Flatness and cleanliness

• The base layer should be hard and flat, without sharp objects, sand holes or cracks, and the corners should be made into arcs (radius ≥50mm).
• Thoroughly clean dust, oil and other debris to ensure that there are no visible water drops.

Construction environment and time

1. Weather conditions

• Construction is strictly prohibited on rainy, snowy and windy days above level 5.
• Anti-cracking measures should be taken during negative temperature construction to avoid excessive stretching of the coil.

2. Temperature limit

• The ambient temperature for hot melt construction should not be lower than 0℃, and hot melt is prohibited for coils with a thickness of less than 3mm.

Material selection and paving technology

1. Material adaptability

• Select the type of roll material according to the climate: SBS for cold areas, APP for high temperature areas, and self-adhesive for complex scenes.
• Check the quality of the tire base (polyester felt is better than composite tire) and the uniformity of impregnation.

2. Paving specifications

• Use the "pull-paving method" or "roll-paving method", vent while paving to avoid hollowing.
• Overlap width ≥80-100mm (short side and long side), and the overlap must be fully glued or overflow with hot melt adhesive.

The construction of waterproof membranes must strictly follow the process of "substrate treatment-material adaptation-standard paving-detail enhancement-safety protection", and flexibly adjust the process according to environmental conditions.