Fixing and buying guide

Who this is for

This flashing is suitable for builders, roofing contractors, and experienced DIY users installing or replacing a VELUX roof window of this specific size. It is appropriate for both new-build and retrofit installations in domestic and commercial settings where a secure weathertight seal is required around the window opening.

Compatibility and sizing

The FK06 flashing is engineered specifically for VELUX roof windows measuring 66×118cm. It is compatible with timber roof construction using structural grades F16, F24, and F32. Before ordering, confirm your window size and timber grade to ensure correct fit. This flashing will not suit windows of different dimensions or alternative roof window manufacturers.

• Window size: 66×118cm only
• Compatible timber grades: F16, F24, F32
• Material: Plastic construction
• Available in multiple colours to match roofing finishes

What you need to check before installation

Inspect the roof opening to confirm it matches the 66×118cm specification and that your timber structure is one of the compatible grades. Check that the flashing colour you have selected matches your roofing material or desired finish. Ensure the roof surface is clean and free from debris before fitting, and that you have all necessary fixings and sealants to hand. Review the VELUX installation instructions specific to this window size and flashing type.

• Verify window opening dimensions are exactly 66×118cm
• Confirm timber grade is F16, F24, or F32
• Check flashing colour matches your roofing
• Prepare the roof surface and gather fixings and sealant

Installation overview

Installation of the FK06 flashing is straightforward for builders and experienced DIY users. The plastic construction is durable and weather-resistant, designed to sit securely around the window frame and integrate with the roof covering. Follow the detailed instructions provided with the product and ensure the flashing is properly sealed to create the weathertight barrier that protects your building from water ingress. If you are unfamiliar with roof window installation, consider engaging a qualified roofer or installer.