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Velux Underfelt Collar BFX 1000 CK01 55 x 70cm

Velux Underfelt Collar BFX 1000 CK01 55 x 70cm Product code: BFX CK01 1000
Product code: BFX CK01 1000
£34.02 (inc. VAT) £28.35 (ex. VAT)

Velux Underfelt Collar BFX 1000 CK01 55 x 70cm more

In stock

Available To Order Online Or Call 01295 235536


7 Working Days


10 Years


he BFX Underfelt Collar ensures a fast connection between the VELUX Roof Window and the roofing felt/membrane. It helps to protect against drafts and wind driven rain and snow around the window installation.

It comes as one piece making fitting easy, especially around the window corners.

The tranverse drainage gutter included also prevents any water ingress around the roof opening caused by missing or broken slates or tiles above the window.

Product features

  • Can be used in all roofing constructions in roof pitches between 15º and 90º.
  • Is well suited for roofs with or without battens.
  • Can be used for both ventilated and unventilated constructions.
  • The underfelt collar is pleated and can be easily dressed round the battens of the roof, irrespective of the batten distance.


  • Special diffusion open underfelt of polypropylene and galvanised steel drainage gutter.
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