Fixing and buying guide

Use this buying guide for VELUX Vapour Barrier 78x98cm BBX MK04 0000 before ordering. What to check before buying: - Confirm dimensions and compatibility with adjoining components. - Verify fixings, adhesives, and accessories required for installation. - Match quantity to project area and allow for cuts/wastage. - Product overview: The Velux BBX MK04 0000 Vapour Barrier Collar - 780x980mm is designed to work with compatible roof window or Sun Tunnel systems, supporting a neat, professional installation and reliable long term performance.