Fixing and buying guide
VELUX Recessed Flashings W/ Installation Productions 78x140cm EDJ MK08 2000
What is included and who needs this product
This is a complete recessed flashing kit for roof window installation. You need this product if you are fitting a 78×140cm VELUX roof window (MK08 2000 size) into a pitched tile roof and require a weather-tight, integrated flashing solution. The kit includes both the 90mm tile flashing and the BDX 2000F installation frame, so no additional flashing components are required for a standard installation.
- Complete kit: tile flashing and installation frame supplied together
- Sized specifically for 78×140cm roof window openings
- Suitable for new build and refurbishment applications
- Designed for pitched tile roofs
Compatibility and sizing
This flashing kit is engineered for VELUX roof windows and Sun Tunnel systems in the MK08 2000 size (78×140cm). Before ordering, confirm that your roof window model matches this size specification. The 90mm flashing depth is designed for standard tile roof construction. Check that your roof pitch and tile profile are compatible with recessed flashing installation; this product is not suitable for flat roofs or non-tile pitched roofs.
- Window size: 78×140cm (MK08 2000) only
- Installation frame: BDX 2000F
- Flashing depth: 90mm for typical tile roofs
- Verify your VELUX window model before purchase
Pre-installation checks and preparation
Before fitting, inspect the roof opening to ensure it matches the 78×140cm specification and that the surrounding roof structure is sound and level. Check that tiles around the opening are in good condition and that there is adequate space for the 90mm flashing depth. Ensure you have the correct VELUX roof window unit ready for installation. Review the installation instructions supplied with the kit to familiarise yourself with the BDX 2000F frame assembly and flashing positioning.
- Confirm roof opening dimensions are 78×140cm
- Check roof structure is level and structurally sound
- Inspect surrounding tiles for damage
- Verify roof pitch is suitable for recessed flashing
- Have VELUX window unit ready before starting
Installation and weather-tightness
The recessed flashing system is designed to create a weather-tight seal when installed correctly with the BDX 2000F frame. The 90mm tile flashing integrates into the roof tile profile to shed water reliably. Follow the manufacturer's installation instructions precisely to ensure proper seating of the flashing and frame, correct positioning of any underlays or membranes, and secure fixing. Proper installation is essential for long-term weather performance in UK roof conditions.
- Follow VELUX installation instructions step by step
- Ensure flashing sits correctly in tile profile
- Secure frame and flashing according to specification
- Check all seals and joints are properly formed
- Test weather-tightness before completing roof work