Fixing and buying guide

What this product is and who it is for

This is a recessed slate flashing for use with VELUX roof windows and Sun Tunnel systems. It is designed for builders, roofers, and serious DIY customers installing or upgrading roof windows on pitched roofs with slate or slate-effect coverings. The flashing manages water run-off and prevents weather ingress at the window perimeter, maintaining both performance and visual consistency across the roof line.

Compatibility and sizing

This flashing is engineered specifically for compatible VELUX roof window and Sun Tunnel systems. The 660×1180mm format is sized for standard roof pitches. Before ordering, confirm that your VELUX window or Sun Tunnel system is compatible with the FK06 flashing type and that your roof pitch and dimensions match this specification. Check the window or system documentation or contact VELUX technical support if you are uncertain.

• Product code: EKN FK06 S0021E
• Dimensions: 660×1180mm
• Profile: Recessed 8mm slate
• Suitable for new build and refurbishment projects

Pre-installation checks

Inspect the flashing for damage before installation. Ensure your roof structure is sound, level, and ready to receive the window and flashing assembly. Confirm that the roof pitch and opening dimensions are correct and that the surrounding roof material (slate or equivalent) is in good condition. Have all necessary fixings, sealants, and tools to hand before beginning work.

• Check flashing for transport damage
• Verify roof pitch and opening dimensions match the 660×1180mm format
• Ensure roof structure is sound and level
• Confirm compatibility with your VELUX window or Sun Tunnel system

Installation and weather protection

The recessed 8mm slate profile is engineered to integrate seamlessly with slate roof coverings, sitting flush with the surrounding material. This design reduces visual impact and supports long-term weather protection by minimising standing water and directing run-off safely away from the window frame. Follow VELUX installation guidance carefully to ensure the flashing is correctly positioned and sealed, as improper installation may compromise weather-tightness.