VELUX BFX MK04 1000 Underfelt Collar 78x98cm

Ensure a weather-tight seal between roof window and roof with the VELUX BFX underfelt collar

The VELUX BFX 1000 underfelt collar is a pleated material that ensures a flexible and tight seal to the underfelt of the roof, whatever it's construction. It also comes with a transverse drainage gutter that helps lead water away from the head of the roof window if a tile or slate is broken above the window.

Underfelt collar – BFX

• Ensures a weather-tight seal between the roof window and the roof
• Can also be purchased separately from the insulation collar (BDX)
• Pleated material ensures a flexible and tight seal to the underfelt of the roof, whatever its construction
• Made from diffusion open material to minimise risk of condensation
• Comes with transverse drainage gutter to lead water away from the head of the window if a tile or slate is damaged above the roof window
• Welded corners ensure a watertight and simple installation