Bituminous Membranes
StressPly Flex SA
StressPly Flex SA is a premium self-adhesive bitumen membrane flat roof system combining self-adhesive technology with hot air welding. It delivers the same durability and waterproofing performance as torch-on systems, without the naked flame. Ideal for occupied buildings, heat-sensitive substrates, and Safe2Torch compliance, ensuring safe installation without compromising protection.
Tensile strength
700/500 N/50mm (L/T) · EN 12311-1.
Waterproofing
Watertight at a head of at least 60 kPa · EN 1928 · BBA-assessed.
Fire performance
BROOF(t4) · EN 13501-5.
Low-temperature flexibility
Cold flexibility to −25°C · EN 1109.
Puncture resistance
Static puncture resistance of at least 15 kg · EN 12730.
Long service life
30+ years, BBA-assessed under normal service conditions · BBA 22/6553.
Why specify StressPly Flex SA?
Flame-Free installation
Self-adhesive application removes the need for torching during membrane installation, reducing fire risk on sensitive projects.
Suitable for live envrionments
Installation can be carried out where hot works restrictions apply, helping maintain normal building operations during refurbishment.
Safe2Torch compliant
Designed to support NFRC Safe2Torch guidance where combustible substrates or high-risk details require a flame-free approach.
Complete waterproofing protection
Delivers the same multi-layer waterproofing principles as traditional built-up membrane systems, with a fully bonded waterproofing assembly.
System Components
Multi-layer flame-free system using self-adhesive technology and hot air welding for safe installation on heat-sensitive substrates.
StressPly Flex SA
Mineral Cap Sheet
Self adhesive cap sheet containing SBS rubber compound for maximum durability and waterproofing performance. The mineral slate finish provides UV protection and weather resistance, available in charcoal and brown finishes. Self adhesive lap technology allows sealing without naked flame, while maintaining the same robust protection as torch-on systems. Ideal for installation over heat-sensitive insulation and combustible deck materials.
SA Dual Release Base Sheet
Self-Adhesive Underlayment
High-performance underlayment featuring polyester reinforcement and SBS modifiers providing excellent tear and puncture resistance while allowing roof structure flexibility. Designed with self adhesive upper and lower surfaces for completely flame-free application, eliminating risks associated with hot air or torch installation on sensitive substrates. The reinforced construction ensures long-term system integrity across demanding refurbishment and new build applications.
SA Flex Vapour Barrier
Air and Vapour Control Layer (AVCL)
SBS modified metal-lined vapour control layer designed for self-adhesive applications, eliminating flame requirements at every layer of the system. This high-performance membrane prevents water vapour infiltration that leads to condensation damage and insulation performance loss. The metal-lined construction provides vapour resistance while self-adhesive technology ensures safe installation without compromising protection or system integrity.
Quick Reference
| Layer | Tensile strength - L/T (N/5cm) | Thickness (mm) | Low Temp. Flex (°C) | Length (m) | Width (m) |
|---|---|---|---|---|---|
| StessPly SA Flex | 700/500 | 3.5 | -25 | 10 | 1.0 |
| SA Dual Release Base Sheet | 400/300 | 3.0 | -25 | 10 | 1.0 |
| SA Flex Vapour Barrier | 1400/1400 | 3.0 | -25 | 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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