Bituminous Membranes
StressPly Flex Plus
Multiple reinforced layers delivering fail-safe waterproofing protection. StressPly Flex Plus, a reinforced bitumen membrane flat roof system, provides protection where it matters most, with each layer engineered to accommodate thermal movement without membrane breaks. Suitable for both warm and inverted roof systems, this multi-layer build-up ensures long-term performance across demanding applications.
High tensile & tear strength
1000/800 N/50mm · BS 8747 · nail tear 450/450
Dependable waterproofing
Passes 1m head · BBA / EN 13707
Fire performance
BROOF(t4) · DD CEN/TS 1187 Test 4 · EN 13501-5
Puncture & low-temp
Static 20kg · dynamic 1000mm · −25°C
Durable, long-term performance
BBA durability · certified since 2008 · incl. blue roof / SUDS
Why specify StressPly Flex Plus?
Multi-layer waterproofing
A multi-layer waterproofing assembly comprising AVCL, underlay, and cap sheet designed to function as a complete waterproofing assembly.
Reinforced construction
Composite polyester and glass fibre reinforcement provides flexibility and tensile strength (up to 1000 N/50mm) within the membrane structure.
Mineral slate finish
A mineral-finished cap sheet provides UV protection to the exposed waterproofing layer.
Warm & inverted roof compatible
Suitable for specification within both warm roof and inverted roof constructions across refurbishment and new-build projects.
System Components
Multi-layer engineered protection with reinforcement in each layer, delivering multi-layer waterproofing integrity for long-term performance.
StressPly Flex Plus
Mineral Cap Sheet
SBS modified bitumen membrane with cold flexibility and UV protection. The mineral slate finish provides weather resistance and long-term performance.
Torch Flex Ultra-Vent
Reinforced Underlayment
High-performance 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 Flex Plus | 1000/800 | 5.2 | -25 | 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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