Fixing and buying guide

What this product is and who needs it

This is a roof flashing designed for builders, roofers, and serious DIY installers fitting VELUX roof windows or roof lights into pitched roofs. The twin and combination function means it accommodates both standard window installations and combination setups, making it a versatile choice for mixed projects or where installation type may vary. If you are installing a CK06 size VELUX window into a tiled or slated pitched roof, this flashing provides the critical weathertight seal that prevents water penetration around the window perimeter.

Compatibility and sizing

This flashing is sized for CK06 VELUX roof windows and roof lights only. The 55x118cm dimensions are specific to this window size, so confirm your window size before ordering. The flashing is designed for pitched roofs finished with tiles or slates and integrates directly with VELUX window frame systems. It is not suitable for flat roofs or non-VELUX window installations.

• Window size: CK06 only
• Roof type: Pitched roofs with tiles or slates
• Compatible with VELUX window frames
• Dual function for standard and combination installations

What is in the pack and pre-installation checks

You will receive one Twin and Combination Flashing measuring 55x118cm. Before installation, verify that your VELUX window is size CK06 and that your roof is pitched with tile or slate covering. Check that the window frame is ready to receive the flashing and that the roof opening is correctly sized and prepared. Ensure you have the correct orientation marked on the flashing and that all fixing materials and sealants required for your specific roof type are available on site.

• Inspect the flashing for damage before installation
• Confirm window size is CK06
• Check roof pitch and tile or slate condition
• Prepare the roof opening and window frame according to VELUX instructions
• Have all fixing and sealant materials ready

Installation guidance

Installation must follow standard roofing practice and VELUX guidelines. Correct orientation of the flashing is critical to ensure water runs away from the window and does not pool or penetrate. The flashing must be securely fixed to prevent movement and water ingress. The aluminium and lead composite construction provides durability, but proper installation is essential for long-term weather protection. If you are unfamiliar with roof flashing installation, consult VELUX technical documentation or engage a qualified roofer to ensure the work meets building standards and warranty requirements.