Fixing and buying guide

What this product is and who it is for

This is a coupled recessed flashing for VELUX roof window and Sun Tunnel installations. It is intended for builders, roofers, and serious DIY customers installing or upgrading roof windows on pitched roofs. The flashing ensures water runs safely away from the window frame and integrates neatly with slate, tile, or similar pitched roof coverings. It is suitable for new build projects and refurbishment work on existing properties.

Compatibility and sizing

This flashing is engineered to work with compatible VELUX roof window and Sun Tunnel systems. The 780×1180mm (78×118cm) dimensions are fixed, so you must verify that your VELUX window or accessory is compatible with the MK06 size designation before purchase. Check your window documentation or contact VELUX technical support if you are unsure of the correct flashing size for your installation.

• Product code: EKN MK06 S0021E
• Flashing type: Twin and combination
• Profile: Recessed 8mm slate
• Applications: Pitched roof windows and Sun Tunnels

Pre-installation checks

Before fitting, confirm that your roof structure and window opening are prepared to the correct dimensions and that the surrounding roof covering is in good condition. Inspect the flashing for any damage in transit. Ensure you have the correct VELUX window or Sun Tunnel unit on site and that all other components (such as the window frame, insulation collar, and any additional flashings) are present and compatible. Check that your pitched roof pitch falls within the range specified by VELUX for this flashing type.

• Verify window or Sun Tunnel compatibility with MK06 size
• Inspect flashing for transport damage
• Confirm roof opening dimensions match product specifications
• Check roof pitch is suitable for pitched roof installation

Installation and weather performance

The recessed 8mm slate profile is designed to sit flush with standard UK roof coverings such as slate, tile, or similar materials, creating a seamless transition that sheds water effectively. The flashing must be installed in accordance with VELUX fitting instructions to ensure a weather-tight seal. Proper installation is critical to long-term roof performance and to prevent water ingress around the window frame. This flashing is engineered to perform reliably in typical UK roof conditions when fitted correctly.

• Follow VELUX installation instructions precisely
• Ensure flashing sits flush with roof covering
• Seal all joints and edges to prevent water ingress
• Suitable for new build and refurbishment applications