VELUX Underfelt Collar 78x140cm BFX MK08 1000

Description

The VELUX BFX MK08 1000 Underfelt Collar is a 780x1400mm flashing component designed to integrate with compatible VELUX roof window and Sun Tunnel systems. It combines an underfelt collar with transverse drainage gutter to create a weather-tight seal at the roof penetration point, ensuring reliable performance in UK roof conditions. Suitable for both new build and refurbishment projects, this collar supports a neat, visually consistent roof finish that meets professional installation standards. When used as part of a wider VELUX daylight and ventilation solution, it contributes to long-term weather protection and system integrity.