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Description

This high-performance, cost-effective waterproofing membrane designed for use in built-up roofing systems. Manufactured with a sanded glass-fibre base and SBS-modified bitumen coating, it delivers outstanding flexibility and durability, making it suitable for both new build and remedial roofing applications.

This underlay is engineered for excellent low-temperature flexibility down to -20°C, ensuring reliable performance in colder conditions. Its high resistance to foot marking enhances its durability, making it ideal for roofing systems that require long-term strength and resilience. The glass-fibre reinforcement provides exceptional stability and structural integrity, further improving its effectiveness as a waterproofing solution.

With its environmentally friendly composition and adaptability to a wide range of substrates, this Wonderbuild underlay is a practical and high-quality choice for modern roofing applications.
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Features

  • Low temperature flexibility at -20°C
  • High resistance to foot marking
  • Glass-fibre reinforcement
  • SBS modified bitumen coating

Specifications

Type

Roofing Underlay

Brand

Wonderbuilds

Manufacturer Code

WB25TSU

Material

Bitumen

Length

16000mm

Width

1000mm

Colour

Black

Weight

2.5kgm²

Reaction to Fire

E

Moisture Resistant

Yes

Pack Type

Roll

Tensile Strength

400L / 170T N/5cm

Wonderbuilds 2.5kg T -20C Torch On Sand Underlay 16x1m

A high-performance glass-fibre based waterproofing membrane designed for use within roofing systems.
£69.69

per Roll or £4.36 per m² + VAT

Qty

equals 16 m²

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