How and where to use guide
Velux EDLS FFK08 2000 Pro+ Slate Flashing for 2-in-1 Studio Window Incl. BDX & BFX - 1270x1400mm
Typical applications and suitability
This flashing kit is intended for use on pitched slate roofs where a Velux EDLS FFK08 2000 Pro+ 2-in-1 studio window is being installed. The 1270×1400mm dimensions suit standard window openings in this range. It is suitable for both new build projects where the roof structure is being constructed and refurbishment work where an existing window is being replaced or a new opening is being created. The flashing is engineered to perform in typical UK roof conditions and integrates visually with slate coverings to maintain a neat, consistent roof finish.
- New build pitched roof installations with slate covering
- Refurbishment and replacement projects on existing slate roofs
- Velux 2-in-1 studio window systems only—check compatibility before ordering
- Suitable for standard UK roof pitches and weather exposure
Installation overview and key steps
Correct installation of the flashing kit is essential for weather-tightness and long-term performance. The BDX and BFX components must be fitted as part of the complete window installation sequence. The flashing sits between the window frame and the slate roof surface, with slates cut and positioned to overlap the flashing in the correct sequence. Installation should follow Velux's detailed instructions supplied with the window and flashing kit. Ensure the roof opening is accurately sized to the 1270×1400mm specification and that the roof structure is sound and level before beginning. All fixings must be secure and any gaps sealed appropriately to prevent water ingress.
- Verify window opening dimensions match 1270×1400mm specification
- Install BDX and BFX components in the sequence specified by Velux instructions
- Ensure slate cutting and overlap sequence is correct for weather protection
- Check all fixings are tight and secure before final slate installation
- Do not proceed if roof structure is damaged or out of level
On-site handling and maintenance
Handle the flashing components carefully during transport and on site to avoid denting or distorting the metal, which could compromise the weather seal. Store the kit in a dry location before installation. Once installed, the flashing requires no routine maintenance beyond periodic inspection to ensure slates remain properly seated and no debris has accumulated around the window perimeter. Check after severe weather or high winds that all components remain secure and that no water staining or damp is visible inside the property around the window frame.
- Protect flashing components from damage during handling and storage
- Inspect periodically to ensure slates remain properly seated
- Clear any debris or moss from around the window perimeter
- Check for signs of water ingress or damp after severe weather
- Do not attempt to repair or modify the flashing—contact Velux if damage occurs
Limitations and important notes
This flashing kit is engineered specifically for Velux EDLS FFK08 2000 Pro+ 2-in-1 studio windows and slate roof applications. It is not suitable for use with other window systems or roof coverings such as tiles, felt, or metal. The 1270×1400mm dimensions are fixed; if your opening differs, a different flashing kit will be required. Proper installation by a competent roofer or installer is essential—poor installation will result in water ingress and structural damage. The flashing forms part of a complete weather-tight system and must be used with all other components specified by Velux for your window model.
- Compatible with Velux EDLS FFK08 2000 Pro+ 2-in-1 studio windows only
- Designed for slate roofs—not suitable for tiles or other coverings
- Fixed dimensions 1270×1400mm—cannot be cut or modified
- Installation by a competent roofer is strongly recommended
- Must be used with all other Velux components specified for your window