StressPly Evolution

StressPly Evolution is an elastomeric SBS modified, bitumen waterproofing membrane that is suitable to use across a wide range of waterproofing applications.

Formulated with SBS modifiers, StressPly Evolution benefits from enhanced thermal, mechanical and anti-ageing characteristics, giving the multi-layered system excellent tensile strength, tear and puncture resistance and elongation properties.


  • 20 year Single-Point Guarantee
  • BBA Certified
  • Contains recycled content
  • Excellent thermal, mechanical and ageing characteristics

System Components

Torch Flex Vapour Barrier

Vapour Control Layer (VCL)

Torch Flex Vapour Barrier is an SBS modified metal lined vapour control layer, for torch-on applications. A high-performance membrane that prevents water vapour from entering the waterproofing system, which can lead to the disruptive formation of condensation.

Torch Flex Evolution Base


Torch Evolution Base includes polyester reinforcement and SBS modifiers providing excellent strength and resistance to tearing and puncturing whilst allowing for flexibility of the roof structure. Both the upper and lower surfaces are finished with a laminated polyethylene film to identify the optimum temperature for application.

StressPly Evolution

Mineral Cap Sheet

Our high-performance StressPly Evolution cap sheet can be used on warm and cold roof applications. Supplied with thermo-fusible film on the underside to assist with the installation and finished with mineral slate granules.

Case Study

Porth Veor Manor

Porth Veor Manor was granted planning permission to add several luxury self-catering apartments in a corner of the hotel grounds, offering spectacular beach views from the hotel cliff-top setting.

See how the StressPly Evolution waterproofing membrane was used to support a new-build green roof system in this beautiful corner of the Cornish coastline.

Get in touch with your local
Garland Technical Manager

Quick Reference

Tensile strength - L/T (N/5cm)
Thickness (mm)
Low Temp. Flex (°C)
Length (m)
Width (m)
StressPly Evolution Cap
Torch Evolution Base
Torch Evolution VCL