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SIGnature Underlay25

£74.10 £61.75
Out of stock
  • Buy 10 for £70.39 £58.66 each and save 5%
  • Buy 25 for £66.88 £55.73 each and save 10%
  • Buy 50 for £63.53 £52.94 each and save 14%

SIGnature Underlay25 12m x 1m prevents penetration of water vapour and damage to roof construction available for delivery across the UK. Buy online now.

SIGnature Underlay 25 is a polyester carrier, reinforced, SBS, torch applied intermediate or base layer (dependent on specification). 


How do i apply the SIGnature Underlay 25?

Apply SIGnature25 by melting the heat dispersible backing and coating to create a molten flow in front of the roll. The flame of the torch should be applied at the low point where the roll meets the substrate or underlay. As the film and bitumen melt, roll the roofing forward. A bead of bitumen must exude from all lap joints to ensure a seal.

How long is the warranty?

Using this underlay option will qualify for a 25-year warranty if used in conjunction with the SIGnature Fire Rated Cap Sheet. 


Benefits of using SIGnature Underlay 25:

  • High tensile polyester base
  • Prevents penetration of water vapour and damage to roof construction
  • SBS bitumen coating offering excellent low temperature flexibility
More Information
Manufacturer's part numberSG200300
Price Pack UnitRoll
Total Size12m x 1m
Shipping Group FrontendSPS
Customer Questions
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Data Sheet (303.29 kB)
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