Bituminous Membranes
StressPly Signature
Engineered with a high SBS modifier content for cold flexibility down to -30°C (EN 1109), this bitumen membrane flat roof system is designed for coastal exposure and extreme temperature swings, keeping the building watertight (EN 1928).
High tensile strength
1350 N/50mm (longitudinal) · EN 12311-1 · exceeds the 750 N/50mm BS 8747 threshold.
Waterproofing
Watertight at a head of at least 60 kPa · EN 1928.
Fire performance
BROOF(t4) · EN 13501-5.
Low-temperature flexibility
Cold flexibility to −30°C · EN 1109.
Puncture resistance
Static puncture resistance of at least 25 kg · EN 12730.
Long service life
30+ years, BBA-assessed under normal service conditions · BBA 22/6245.
Why specify StressPly Signature?
Flexible to -30℃
Maintains flexibility at temperatures down to -30°C, supporting membrane performance in cold weather conditions.
High SBS modifier content
Formulated with a high SBS modifier content to increase membrane flexibility and elongation characteristics.
Multi-layer build-up
A multi-layer waterproofing assembly comprising AVCL, underlay, and cap sheet designed to function as a complete system.
System Components
StressPly Signature combines high SBS modifier content, low-melt technology, and a multi-layer membrane build-up to create a bituminous waterproofing system for refurbishment and new-build applications
StressPly Signature
Mineral Cap Sheet
SBS modified bitumen membrane with cold flexibility to -30°C (EN 1109) and UV protection. The mineral slate finish supports long-term performance.
Torch Flex Ultra-Vent
Reinforced Underlayment
Torch-on base sheet with low-melt strips that allow trapped vapour to disperse throughout the system, preventing blistering and ensuring system longevity.
Torch Flex Vapour Barrier
Air and Vapour Control Layer (AVCL)
SBS modified metal-lined vapour control layer preventing water vapour infiltration that can cause condensation damage and system failure.
Quick Reference
| Layer | Tensile strength - L/T (N/5cm) | Thickness (mm) | Low Temp. Flex (°C) | Length (m) | Width (m) |
|---|---|---|---|---|---|
| StressPly Signature | 1100/900 | 5.5 | -30 | 5 | 1.0 |
| Torch Flex Ultra Vent | 900/700 | 3.5 | -20 | 8 | 1.0 |
| Torch Flex Vapour Barrier | 1400/1400 | 3.0 | -20 | 10 | 1.0 |
Need specification advice?
Your local Garland UK Technical Manager can help assess your roof, develop the appropriate specification, and recommend the right StressPly system for your project.
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