VELUX BFX 1000 Underfelt Collar
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The VELUX BFX 1000 underfelt collar and transverse drainage gutter ensures a weather-tight seal between the roof window and the roof. The diffusion open material will help to minimise the risk of condensation.
- The transverse drainage gutter leads water away from the head of the roof window if a tile or slate is broken above the window
- Pleated material ensures a flexible and tight seal to the underfelt of the roof, whatever it's construction
- Ensures a weather-tight seal between the roof window and the roof