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High performance polyester reinforced, rubber modified roofing underlay designed to be used in torching applications. It includes adhesive strips on the underside, which allow trapped vapour to disperse throughout the roofing system. The unique adhesive qualities of the thermoplastic bitumen strips ensure that the bonding quality equals that of a traditional roofing system using conventional venting underlays.

It can be used in conjunction with Torch Flex Ultra Bond vapour barrier and StressPly® membranes to create a roof system with a low installation cost which doesn't compromise on the quality and life expectancy of the completed system.

Standard product features


Bitumen modified with thermoplastic rubber (SBS).


Reinforced and stabilized non-woven polyester mat.

Size (l x w):

8 x 1 m.


3 mm.

Technical properties:

  • Breaking elongation (L/ T): 45/ 45%.
  • Dimensional stability: ±0.2%.
  • Low temperature flexibility: -20°C.
  • Resistance to tearing (L/ T): 150/ 150 N.
  • Tensile strength (L/ T): 900/ 700 N/ 50 mm.
  • Watertightness: 60 kPa.

Product specification

An important note about specifying



Garland UK


+44 (0)1174 401050

Product reference

Torch Flex Ultra-Vent


[Not required]
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