How and where to use guide
VELUX Twin and Combination Flashings 55x78cm EKL CK02 0021E
Typical applications and suitability
This flashing is specifically engineered for pitched roof installations incorporating twin or combination VELUX roof windows. It is suitable for properties with standard tile or slate roof coverings where multiple windows require a single integrated flashing solution. The 55x78cm size is appropriate for standard pitched roof applications. This product is not suitable for flat roofs or non-standard roof coverings.
- Twin or combination roof window installations on pitched roofs
- Tile and slate roof coverings only
- Standard pitched roof pitches and tile courses
- Properties requiring weathertight integration of multiple window openings
Installation and alignment
Correct installation requires careful alignment with both the roof pitch and existing tile courses to ensure proper water shedding and maintain structural integrity. The integrated design combines upper and lower flashing profiles in a single unit, reducing the number of installation steps compared to separate flashing components. Positioning must account for the roof's angle and the regular spacing of tiles or slates to avoid gaps that could compromise weathertightness.
- Align flashing carefully with roof pitch before securing
- Position to match existing tile or slate courses
- Ensure upper and lower profiles are correctly seated
- Check that water drainage paths are clear and unobstructed
Weathertightness and drainage maintenance
The flashing maintains a weathertight seal around multiple window openings whilst allowing proper ventilation. To preserve performance, regularly inspect the flashing for debris accumulation, particularly around the drainage channels. Clear any moss, leaves or other material that could obstruct water flow. Check that the seal between the flashing and roof covering remains intact, particularly after severe weather or roof movement.
- Inspect flashing regularly for debris or blockages
- Clear drainage channels to maintain water shedding
- Check seal integrity around window openings
- Ensure ventilation paths remain unobstructed
On-site handling and installation tips
Handle the flashing carefully during transport and on site to avoid damage to the integrated profiles. Before installation, verify that the roof opening dimensions and pitch match the specifications for this 55x78cm unit. Ensure all necessary fixings and sealants suitable for your specific roof covering are available before commencing work. The integrated design saves installation time, but precision in alignment is essential to achieve the weathertightness benefits of this single-unit solution.
- Verify roof opening size and pitch compatibility before starting
- Handle flashing carefully to avoid profile damage
- Have all fixings and compatible sealants ready
- Allow adequate time for careful alignment despite reduced installation steps