Fixing and buying guide

Who this product is for

This flashing is essential for anyone installing or maintaining a 55x78cm VELUX roof window on a pitched roof. It suits both new build projects and retrofit installations where you need to create a secure, weathertight junction between the window and roof. If you are replacing an existing VELUX window or upgrading the flashing on an older installation, this standard EDL CK02 kit is the correct choice for your window size.

Compatibility and sizing

This flashing is manufactured specifically for 55x78cm VELUX roof windows. Before ordering, confirm your window dimensions match this size exactly. The EDL CK02 is the standard flashing type for this window size on pitched roofs. Do not use this flashing with smaller or larger VELUX windows, as it will not create a proper weathertight seal. Check your existing window frame or VELUX documentation to verify the correct size before purchase.

What is included and pre-installation checks

This is a complete flashing kit containing all components needed for a weathertight installation. Before you begin, inspect the flashing for any damage during transit and check that your roof structure is sound and ready to receive the window. Ensure the roof opening is cut to the correct dimensions for a 55x78cm window and that the surrounding roof area is clean and free from debris. Have VELUX installation instructions to hand, as proper fitting is essential for weathertightness.

• Complete aluminium flashing kit with all necessary components
• Suitable for pitched roof applications only
• Requires standard roof window installation tools and materials
• Follow VELUX guidance carefully to ensure weathertight seal

Material and durability

The flashing is manufactured from durable aluminium, which provides excellent corrosion resistance and long-term performance in exposed roof conditions. Aluminium is lightweight, easy to work with during installation, and requires minimal maintenance once fitted. This material choice ensures the flashing will protect your window and roof structure reliably for many years.