How and where to use guide

VELUX Underfelt Collar 78x118cm BFX MK06 1000 should be used according to the intended application and site requirements. How and where to use: - Prepare surfaces and adjoining assemblies before installation. - Install to manufacturer guidance and relevant site standards. - Check fit, alignment, and finish quality before handover. - Additional context: The VELUX Underfelt Collar BFX MK06 1000 completes VELUX rooflight installation, providing a weather-tight seal and insulation layer. Installed on rafters or joists, it prevents heat loss and moisture ingress around the rooflight opening. Suitable for timbe...