Home > Companies > Garland UK > StressPly® Flex Plus

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.

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.

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Garland UK


+44 (0)1174 401050

Product reference

StressPly® Flex Plus


[Brown mineral]
[Green mineral]
[Grey mineral]


[Not required]
[Garland Garla-Prime®]
For maximum surface adhesion.

Manufacturer details

The Garland Company UK Ltd,
Second Way,
Bristol, BS11 8DF
Tel +44 (0)1174 401050
Fax +44 (0)1174 401057
NBS Plus