Description
The WonderBuilds 4kg A Film Underlay is a high-performance waterproofing membrane designed for use as part of a multi-layer roofing system. Boasting high-quality polyester reinforcement, this underlay is strong & durable and is suited to use in new builds or refurbishments alike.
Easily applied using torch on methods, this SBS modified bitumen coated underlay can be applied to a wide range of substrates. An environmentally friendly option that doesn’t compromise on performance, the WonderBuilds 4kg A Film Underlay is a reliable and cost-effective waterproofing solution you can trust.
Why Choose this WonderBuilds 4kg A Film Underlay 8m x 1m?
- High-performance underlay solution
- Polyester reinforcement
- Quick & easy installation
- Strong & durable
- Cost-effective
Product Specifications:
Roll Dimensions: 8m x 1m
Weight (kg/m²): 4
Cold Flexibility (°C): -15 to -18
Tensile Strength (N/50mm): 600 (LD) / 400 (TD)
Elongation at Break (%): 35 (LD) / 35 (TD)
Resistance to Static Loading (kg): 10
Resistance to Impact Loading (mm): 900
Flow Resistance at Elevated Temperature (°C): 110
Dimensional Stability (%): ± 0.8
External Fire Performance: F Roof
Reaction to Fire: Class F
Watertightness Method A (10 kPa): Pass
Water Vapour Transmission (µ): 20,000
Have a Question?
Be the first to ask a question about this.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.