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StressPly® Flex Plus

Third party certifications:
  • BBA Agrément Certificate

    Certificate type

Garland UK

High strength, polyester reinforced, SBS rubber modified roofing membrane.

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+44 (0)1174 401050 www.garlandukltd.co.uk

A high strength, polyester reinforced, SBS rubber modified roofing membrane designed to be used in low slope roofing as the top component of a multi-ply roofing system. This product is heavier and thicker than the standard Garland StressPly Flex product, offering increased protection from punctures, maintaining waterproofing integrity.

StressPly Flex Plus can be used in conjunction with other Garland high performance roofing products, as well as with conventional polyester felt underlayment. It can be used to repair splits, cracks or other deteriorated areas of existing asphalt based roofing systems. It comprises a high percentage of quality blended SBS rubber compound which ensures superior low temperature flexibility reinforced by high strength polyester.


  • Excellent low temperature flexibility.
  • High strength.
  • Long term resistance to splits and tears.


Garland Garla-Prime®: To be specified separately (if required).

General information

Excellent low temperature flexibility

High strength

Long term resistance to splits and tears


Bitumen modified with thermoplastic rubber (SBS)

Uniclass 2015 Reinforced bitumen roofing sheets (Pr_25_57_08_75)
Specification data
Product Reference

StressPly® Flex Plus


Brown mineral

Green mineral

Grey mineral

Standard product features


Bitumen modified with thermoplastic rubber (SBS).


Reinforced and stabilized non-woven polyester mat.

Size (l x w):

5 x 1 m.


5 mm.


6 kg/m².

Technical properties:

  • Breaking elongation (L/ T): 50/ 50%.
  • Dimensional stability: ±0.3%.
  • Low temperature flexibility: -20°C.
  • Reaction to fire (to BS 476-3): EXT.F.AC.
  • Resistance to tearing (L/ T): 200/ 200 N.
  • Tensile strength (L/ T): 1200/ 1000 N/50 mm.
  • Watertightness: 60 kPa.

Third party certifications

Additional certifications:

  • Certificate: 08/4569 : Stressply Flex and Stressply Flex Plus Roof Waterproofing Membranes