Bituminous Membranes
StressPly Evolution
High-performance elastomeric SBS modified bitumen membrane that delivers exceptional flexibility and strength across diverse waterproofing applications. Advanced formulation provides superior thermal stability, mechanical resilience, and anti-aging properties for long-term building protection.
Why specify StressPly Evolution?
Recycled content
Manufactured using recycled polymer-modified bitumen, supporting circular economy objectives and project sustainability targets.
Reinforced durability
Composite reinforcement enhances dimensional stability, puncture resistance and long-term membrane performance.
Thermal flexibility
Engineered to accommodate thermal movement while maintaining flexibility across seasonal temperature fluctuations.
Multi-layer protection
Built-up waterproofing assembly provides resilient protection through multiple waterproofing layers and redundant system design.
System Components
Three-layer engineered protection system
StressPly Evolution
Mineral Cap Sheet
UV protection and weatherproofing
Mineral slate granule finish with thermo-fusible installation film. Suitable for warm, inverted and cold roof applications.
Torch Flex Evolution Base
Reinforced Underlayment
Polyester reinforcement with SBS modifiers delivers exceptional tear and puncture resistance.
Torch Flex Vapour Barrier
Vapour Control Layer (VCL)
Prevents condensation damage
SBS modified metal-lined barrier stops water vapour infiltration that causes system failure.
Quick Reference
| Layer | Tensile strength - L/T (N/5cm) | Thickness (mm) | Low Temp. Flex (°C) | Length (m) | Width (m) |
|---|---|---|---|---|---|
| StressPly Evolution Cap | 1000/800 | 4.2 | -25 | 6 | 1.0 |
| Torch Evolution Base | 850/650 | 4.0 | -15 | 8 | 1.0 |
| Torch Evolution VCL | 600/400 | 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.
Read about our
systems in action.
Discover how we’ve transformed buildings across every sector, delivering lasting protection and peace of mind to our clients.
