Fixing and buying guide

What this product is and who it is for

This is a standard slate flashing system engineered specifically for VELUX roof windows and Sun Tunnel systems. It is intended for builders, roofers, and experienced DIY installers working on new build or refurbishment projects where a VELUX roof window needs to be installed into a slate roof. The kit provides the complete flashing assembly and installation products needed for a weather-tight seal around the window opening.

Compatibility and sizing

This flashing is compatible with standard VELUX roof window ranges and VELUX Sun Tunnel systems. The flashing dimensions are 660×1180mm (66×118cm), which corresponds to the FK06 size designation. Before ordering, confirm that your VELUX roof window matches this size specification. Check your window documentation or measure the opening carefully to ensure correct compatibility.

• Designed for VELUX roof windows and Sun Tunnel systems only
• Size: 660×1180mm — verify your window size before purchase
• Suitable for slate roof applications
• Engineered for UK roof conditions

Pack contents and preparation

This is a complete kit containing the standard slate flashing and all necessary installation products required for fitting. No additional flashing components or sealants need to be sourced separately. Before installation, inspect all components for damage in transit and lay them out to confirm nothing is missing. Ensure the roof opening is prepared to the correct dimensions and that the roof structure is sound and ready to receive the window and flashing assembly.

Pre-installation checks

Verify that your VELUX roof window is the correct size (FK06, 660×1180mm) and that it is compatible with this standard flashing system. Check that the slate roof is in good condition and that the opening has been cut to the correct size. Confirm that all installation products are present in the kit and undamaged. Review VELUX installation instructions before beginning work to ensure proper sequencing and weather-tight assembly.

• Confirm window size matches FK06 specification
• Inspect roof opening dimensions and condition
• Check all kit components are present and undamaged
• Have VELUX installation instructions available during fitting