Fixing and buying guide

What this product is and who it is for

A recessed flashing kit creates a professional, weather-tight seal between a VELUX roof window and your roof tiles. This kit is for builders, roofers, and experienced DIY installers carrying out new build or refurbishment work with VELUX UK08 roof windows. The recessed design means the window sits flush with the roof surface for a clean finish, rather than sitting proud of it.

Compatibility and sizing

This flashing is designed exclusively for VELUX UK08 roof windows and compatible Sun Tunnel systems. The kit dimensions are 1340×1400mm (width by height), which matches the UK08 window size. Before ordering, confirm your roof window model is UK08 and check that your roof pitch and tile type are suitable for recessed installation. The 90mm tile flashing depth is engineered for standard UK roof tile profiles.

• Compatible only with VELUX UK08 roof windows and compatible Sun Tunnel systems
• Dimensions: 1340×1400mm
• 90mm recessed tile flashing depth
• Check your roof window model before purchase

What is included and pre-installation checks

The kit contains a recessed tile flashing and a BDX 2000F installation frame. Before you begin, inspect all components for damage, ensure your roof structure is sound and able to support the window, and verify that your roof tiles and pitch are compatible with recessed flashing installation. Check that the opening in your roof is correctly sized and prepared to receive a UK08 window. Have adequate roof ventilation planned, as the installation frame will affect airflow around the window.

• Kit includes 90mm tile flashing and BDX 2000F installation frame
• Inspect components on delivery for any transport damage
• Verify roof opening is correctly sized for UK08 windows
• Confirm roof structure is sound and suitable for recessed installation
• Check roof pitch and tile type compatibility

Fixing and installation

This is a specialist installation requiring roofing experience. The flashing must be integrated into the roof tile course, with the installation frame secured to the roof structure to create a weather-tight seal. The recessed design means careful cutting and fitting of tiles around the flashing is essential. We recommend professional installation by a qualified roofer or VELUX-trained installer to ensure the window performs correctly and your roof remains weather-tight. Improper installation can lead to water ingress and structural damage.

• Professional roofing installation recommended
• Flashing integrates into the tile course for a flush finish
• BDX 2000F frame must be securely fixed to roof structure
• Careful tile cutting and fitting required around the flashing
• Weather-tight seal is critical to long-term performance