Fixing and buying guide

Who this product is for

This flashing is designed for anyone installing or replacing a CK06 VELUX roof window on a pitched roof. It suits both professional installers and experienced DIY builders who are comfortable working at height and have basic roofing knowledge. The product is essential if your roof is covered in slate, clay tile, concrete tile or sheet materials.

Compatibility and sizing

This flashing is specifically engineered for CK06 window sizes with a 55x118cm aperture dimension. Before purchasing, confirm your VELUX window size matches CK06 specification. The flashing is designed for pitched roof installations and will not suit flat roofs. Check that your existing or planned roof covering material is slate, clay tile, concrete tile or sheet material, as these are the only compatible surfaces.

• Window size: CK06 only
• Aperture dimensions: 55x118cm
• Suitable roof materials: slate, clay tile, concrete tile, sheet coverings
• Roof type: pitched roofs only

What is included and pre-installation checks

This product is a single twin and combination flashing unit. Before installation, inspect the flashing for any damage during transit. Ensure your roof aperture is correctly sized and prepared to the CK06 specification. Check that surrounding roof material is in good condition and that you have adequate access and safety equipment for working on a pitched roof. Have your VELUX window frame ready for installation, as the flashing must be fitted as part of the window installation process.

• Check window size matches CK06 specification
• Verify aperture dimensions are 55x118cm
• Inspect flashing for transport damage
• Confirm roof material compatibility before ordering

Installation overview

The flashing is designed for straightforward installation on standard pitched roof pitches as part of your VELUX window installation. The twin and combination function in a single unit simplifies the weatherproofing process by eliminating the need for separate components. Installation should be carried out in accordance with VELUX instructions to ensure the weathertight seal is properly achieved. Proper fitting is critical for long-term weather protection and to prevent water ingress around the window perimeter.