Homeowner
Professional
Dealer Extranet
Free installer training
VELUX logo
Product information
Tools and services
Support
Partner resources
BFX underfelt collar

BFX underfelt collar

  • Commercial Description
    BFX underfelt collar closes the gap between the roof window and underfelt in the roof construction thereby creating a watertight seal between the roof window, battens and the roofing underfelt. It is made of diffusion open material and is easy to fit.

Benefits

Ensures a perfect fit and watertight seal between the roof window, battens and the roofing underfelt
Easy to fit. Simply place on top of the roof window and unfold
The drainage gutter is included in the BFX. This leads the water away from the head of the roof window if there is a leak above

Installation Guide Asset

Assets: 4
BFX 1000F
LINK
Installation instruction for flashing for installation BFX W34/0000
LINK
Installation instruction for BFX 1000
LINK
Installation instruction for flashing for installation BFX 1010
LINK

EPD Assets

Assets: 1
EPD BFX Under roof felt
LINK

CAD drawing

Assets: 1
CAD Drawing
LINK

CE Marking Asset URL

Assets: 1
https://resources.velux.ie/ce-marking
LINK

Size Chart

Assets: 1
Poster with VELUX roof windows (product size chart) Standard roof windows and Special function roof windows
LINK