How and where to use guide

VELUX Underfelt Collar 55x98cm BFX CK04 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 is a weatherproofing component designed for CK04 roof windows on pitched roofs. Measuring 55x98cm, it creates a secure seal between the window frame and roof underlay, preventing water ingress at the critical junction. This collar...