How and where to use guide

VELUX Underfelt Collar 55x78cm BFX CK02 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: Developed to complement common VELUX roof window and accessory ranges. Supports a weather tight and visually consistent roof finish. Suitable for use in both refurbishment and new build projects. Engineered for reliable service life in typical UK roof condi...