NORfast is a revolutionary retro-fit seal.
Using dual air pocket technology, NORfast effectively creates a seal between the door and the stop, which boosts the acoustic performance of the door by up to 48dB.
NORfast provides excellent fire and smoke sealing, tested up to 30 minutes in accordance with BS 476: Part 22: 1987: and BS 476: Part 31: 1987 (please refer to our 'downloads' to find further information).
Designed to include a PVC-housed intumescent strip, NORfast is capable of expanding or swelling (intumescing) under extreme heat, which provides a greater seal in the event of fire.
The recommended gap tolerance is 3mm - 4mm.
No. Since the NORfast is a continuous acoustic seal it acts as a smoke seal, better in some ways than standard intumescent smoke seals.
The NORfast doesn‘t need a rout as it uses self adhesive on its base to adhere straight to the frame.
Yes, due to the fitment position of this seal, it is unaffected by door furniture.
Absolutely correct! Not only does the NORfast have all the acoustic and smoke sealing, along with the draught excluding of a NOR710, it also carries with it a strip of our intumescent seal, adding Fire Protection to an already great product.