How and where to use guide
VELUX Twin and Combination Flashings 78x118cm EKL MK06 0021E
Typical applications and suitability
This flashing is designed for pitched roof installations where a 78x118cm VELUX MK06 window is being fitted. The twin and combination design makes it ideal for new-build work and renovation projects where you need a complete, integrated flashing solution without sourcing multiple separate components. It works with standard pitched roof pitches and is particularly suited to applications where simplified specification and reduced installation complexity are priorities.
- New-build pitched roof window installations
- Renovation and retrofit projects with existing MK06 frame systems
- Applications requiring integrated upper and lower weatherproofing
- Standard pitched roof constructions
Installation and on-site use
The flashing must be installed to work with the VELUX MK06 window frame system. Ensure the roof opening is prepared to the correct dimensions for a 78x118cm window before fitting. The integrated design means both upper and lower weatherproofing elements are combined, so installation follows a single sequence rather than requiring separate upper and lower flashing components. Position the flashing to create a weather-tight seal, with particular attention to water run-off management on the pitched roof surface. Follow VELUX installation guidance specific to the MK06 frame and EKL flashing system to ensure proper integration with your roof structure and any insulation or membrane layers.
- Confirm roof opening dimensions match 78x118cm specification
- Install with VELUX MK06 frame system only
- Ensure water run-off is directed away from the window seal
- Integrate with roof membrane and insulation layers as per VELUX guidance
- Check all seals are complete before weather exposure
Maintenance and durability
Once installed, the flashing requires routine inspection to ensure the weatherproofing seal remains intact. Check that debris, moss, or leaves do not accumulate around the flashing edges, as this can impede water drainage. Inspect the seal periodically, particularly after severe weather, to confirm no water ingress has occurred around the window perimeter. The integrated design reduces the number of joints and potential weak points compared to separate flashing components, which can improve long-term durability if installed correctly.
- Inspect flashing seal annually and after severe weather
- Clear debris from around the flashing to maintain water drainage
- Check for any signs of water ingress or staining around the window frame
- Ensure no damage to the flashing has occurred from roof traffic or maintenance work
Limitations and important notes
This flashing is sized and designed specifically for 78x118cm VELUX MK06 windows on pitched roofs. It is not suitable for other window sizes, frame types, or flat roof applications. The dual-function design is optimised for standard pitched roof constructions; non-standard roof pitches or unusual structural conditions may require alternative flashing solutions. Always verify that your window frame is MK06 type before ordering, as using an incorrect flashing specification will compromise weatherproofing performance.
- Size-specific: 78x118cm only — not suitable for other dimensions
- Frame-specific: VELUX MK06 only — incompatible with other frame systems
- Pitched roof application only — not for flat roofs
- Verify frame type before installation to avoid specification errors