The pleated underfelt collar BFX ensures a flexible and tight connection between the underfelt and the top of your sun tunnel.
With the pleated underfelt VELUX BFX Collar, you ensure that you have a flexible and tight seal to the underfelt of the roof and the top of your sun tunnel, whatever the construction. This kit also includes a drainage gutter which aids in leading water away from the top of the room window if a tile or slate is broken above the window.
Features & Benefits:
- Strong connection between the Sun Tunnel and roof.
- Maintains a professional finish to the roof.
- Suitable for both sizes of Sun Tunnel: 10” and 14”
- A weathertight seal in ensured from the welded corners
- Easy to install