Fixing and buying guide

Who this product is for

This flashing is for anyone installing or replacing a CK06 VELUX roof window on a pitched roof. It is suitable for both new build installations and retrofit projects where a weathertight seal between the window and roof covering is required. You will need this product if your roof pitch is 55° or less.

Compatibility and sizing

This flashing is designed specifically for CK06 roof windows and measures 55×118cm. Before ordering, confirm that your window is a CK06 size and that your roof pitch does not exceed 55°. The flashing integrates directly with your roof covering, whether tiles or slates, so check that your roof structure can accommodate the flashing profile.

• Window size: CK06 only
• Flashing dimensions: 55×118cm
• Maximum roof pitch: 55°
• Material: Aluminium (corrosion resistant)

What is included and pre-installation checks

You receive one Standard Flashing unit sized for CK06 windows. Before installation, verify that your CK06 window frame is ready and that the roof opening is correctly dimensioned. Check that your roof pitch does not exceed 55° and that your roof covering (tiles or slates) is in good condition around the installation area. Ensure you have the correct roof window size and that the flashing dimensions match your opening.

• One Standard Flashing unit (55×118cm)
• Confirm CK06 window size compatibility
• Check roof pitch is 55° or less
• Inspect roof structure and covering condition
• Verify correct opening dimensions

Installation and fixing

Installation requires careful alignment of the flashing with your roof tiles or slates to ensure proper water run-off and weathertightness. The aluminium flashing must be positioned to integrate the window frame directly into the roof covering. Precise alignment is critical to prevent water ingress at the junction. Follow VELUX installation guidance carefully, as improper installation can compromise the weathertight seal and lead to water damage. Consider professional installation if you are unfamiliar with roof window flashing work.

• Align flashing carefully with roof tiles or slates
• Ensure proper water run-off from the flashing
• Integrate window frame directly into roof covering
• Maintain weathertight seal at all junctions
• Professional installation recommended for pitched roof work