How and where to use guide
VELUX Twin and Combination Flashings 78x118cm EKN MK06 S0021E
Typical applications and installation
This flashing is used to seal the perimeter of VELUX roof windows and Sun Tunnel systems installed on pitched roofs with slate or similar tile coverings. The recessed 8mm profile is designed to sit flush with the roof surface, allowing roof tiles or slates to overlap the flashing edge naturally. Installation involves positioning the flashing around the window or tunnel opening before laying roof coverings, ensuring the flashing sits level and secure. The flashing must be installed in accordance with VELUX fitting instructions specific to your roof window model to guarantee weather-tightness and structural integrity.
- Use on pitched roofs with slate, tile or similar coverings
- Install before laying final roof coverings to ensure proper overlap
- Ensure flashing is level and fully supported on roof structure
- Compatible only with specified VELUX roof window and Sun Tunnel systems
- Suitable for both new build and refurbishment roof projects
Weather-tightness and roof performance
The recessed 8mm slate design is engineered to maintain a weather-tight seal in typical UK roof conditions. The profile allows roof coverings to overlap the flashing edge, directing water runoff away from the window frame and preventing water ingress. Proper installation is critical to performance; the flashing must sit flush against the roof structure with no gaps or movement. Regular inspection of the roof covering around the flashing is recommended to ensure tiles or slates remain secure and overlapped correctly, particularly after severe weather or high winds.
- Recessed profile directs water away from window frame
- Requires proper overlap of roof coverings for weather protection
- Inspect periodically to confirm roof coverings remain secure
- Do not use on flat roofs or non-pitched applications
- Engineered for standard UK climate conditions
Compatibility and on-site handling
This flashing is specifically designed for VELUX roof window and Sun Tunnel systems and must only be used with compatible models. Before ordering, confirm the flashing code matches your window specification. On site, handle the flashing carefully to avoid denting or distorting the profile, which could compromise the weather seal. Store the flashing flat and protected from weather until installation. Do not attempt to force the flashing to fit non-compatible windows or to adapt it for use on flat roofs or other applications outside its design specification.
- Confirm compatibility with your VELUX roof window or Sun Tunnel model before installation
- Handle carefully to prevent damage to the recessed profile
- Store flat and protected from weather on site
- Not suitable for flat roofs, dormer windows or non-VELUX systems
- Follow VELUX installation instructions for your specific window model