How and where to use guide
VELUX Recessed Flashings W/ Installation Productions 134x98cm EDN UK04 2000
Typical applications
This recessed flashing system is intended for installation with 134×98cm VELUX roof windows and compatible Sun Tunnel daylight systems. It is suitable for use on pitched roofs in new build construction and refurbishment work on residential properties across the UK. The recessed design allows the window to sit flush with the roof surface, creating a neat appearance whilst the slate flashing ensures the installation blends with typical UK roof materials.
- New build residential roof window installations
- Refurbishment projects upgrading existing roof openings
- VELUX roof window and Sun Tunnel system integration
- Pitched roofs requiring weather-tight window sealing
Installation and fitting
The BDX 2000F installation frame provides the structural support and positioning for the 134×98cm window opening. The 8mm slate flashing is integrated into the kit to create the weather-tight seal between the window frame and roof surface. Installation should follow VELUX guidance to ensure the frame is correctly positioned and the flashing is properly seated to prevent water ingress. The recessed design means the window sits within the roof plane rather than projecting above it, which simplifies the flashing arrangement and improves the overall roof appearance.
- Use the BDX 2000F frame to establish correct window position and opening size
- Ensure the 8mm slate flashing is properly seated and sealed around the window perimeter
- Follow VELUX installation instructions for your specific roof type and pitch
- Check that the recessed installation does not compromise roof ventilation or structural integrity
Weather performance and maintenance
The 8mm slate flashing is engineered to withstand typical UK roof conditions including rain, wind, and temperature variation. The recessed design minimises exposure of the flashing edges and reduces the risk of water pooling around the window frame. After installation, inspect the flashing seal periodically, particularly following severe weather, to ensure it remains weather-tight. Keep the roof area around the window clear of debris and moss to maintain effective water drainage.
- Inspect flashing seal annually and after severe weather events
- Clear moss, leaves, and debris from the roof around the window
- Check that water drains freely away from the flashing
- Do not apply excessive force or load to the window frame or flashing
Limitations and site considerations
This flashing kit is specifically designed for 134×98cm VELUX roof windows and Sun Tunnel systems. It is not suitable for other window sizes or manufacturers. The recessed installation requires adequate roof space and structural support at the installation point. Ensure the roof pitch and construction are compatible with VELUX specifications before ordering. The kit is designed for pitched roof applications and is not suitable for flat roofs or other roof types without appropriate adaptation.
- Only use with 134×98cm VELUX roof windows and compatible Sun Tunnel systems
- Confirm roof pitch and construction compatibility before installation
- Not suitable for flat roofs without additional measures
- Ensure adequate structural support at the window opening location