Fixing and buying guide

What this product is and who it is for

This is a specialist roof flashing for use with VELUX roof windows and Sun Tunnel systems. It is intended for builders, roofers, and serious DIY installers working on slate roofs who need to install or replace a roof window or Sun Tunnel with a professional, weather-tight finish. The flashing ensures water runs safely away from the window frame and maintains the integrity of the slate roof surface.

Compatibility and sizing

This flashing is a twin and combination type measuring 550 x 980mm (55 x 98cm) and is designed specifically for VELUX roof windows and Sun Tunnel systems. Before ordering, confirm that your roof window or Sun Tunnel model is compatible with the EKN CK04 S0021E flashing. The 8mm recessed design is engineered for slate roof tiles. Do not use on other roof materials or with incompatible window systems.

• Flashing dimensions: 550 x 980mm
• Recess depth: 8mm for slate integration
• Suitable for VELUX roof windows and Sun Tunnels only
• Check your window or Sun Tunnel model number against VELUX compatibility charts before purchase

Pre-installation checks

Inspect the flashing on delivery for any damage or defects. Check that the recessed profile is clean and free from debris. Ensure your roof opening dimensions and window frame are compatible with this flashing size. Verify that your slate roof is in sound condition and that the roof structure can support the installation. Have all necessary roof window or Sun Tunnel components ready before beginning work.

• Inspect for transport damage
• Confirm roof opening dimensions match flashing size
• Check slate roof condition and structural integrity
• Gather all window or Sun Tunnel installation components

Installation overview

This flashing must be installed by a competent roofer or experienced installer familiar with slate roof work and VELUX systems. The recessed 8mm design requires careful integration with existing slate tiles to maintain weather-tightness and roof appearance. Installation involves positioning the flashing around the window frame, securing it to the roof structure, and ensuring all joints are sealed. Refer to VELUX installation instructions and follow best practice for slate roof work. Improper installation may result in water ingress and damage to the building.