Description
The WonderBuilds 180 Sanded Underlay is a high-performance waterproofing solution designed for use in built-up roofing systems. Saturated and coated with SBS modified bitumen, the underlay is finished with fine grain sand on both sides and is reinforced using high-quality polyester.
Strong and durable, this membrane meets the requirements for new builds and refurbishments alike. The versatile WonderBuilds 180 Sanded Underlay is compatible with most Pour and Roll and Torch On materials.
Why Choose this WonderBuilds 180 Sanded Underlay 20m x 1m?
- High-performance waterproofing solution
- Polyester reinforced
- Sand coating on both sides
- Quick & easy to install
- Strong & durable
Product Specifications:
Material: SBS modified bitumen
Base Carrier: 180g spunbond polyester
Upper Face Finish: Fine mineral granules
Lower Face Finish: Silica sand
Roll Dimensions: 20m x 1m
Weight (kg/m²): 1.8
Visible Defects: Pass
Watertightness: Pass
Straightness: Pass
Tensile Strength (N/50mm): 890 (LD) / 590 (TD)
Elongation at Maximum Load (%): 38 (LD) / 46 (TD)
Resistance to Tearing (N): 150 (LD) / 140 (TD)
External Fire Performance: TROOF (t4)
Fire Reaction: Class F
Cold Flexibility (°C): ≤ -5
Flow Resistance at Elevated Temp (°C): -0.3
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