How and where to use guide
VELUX Twin and Combination Flashings 134x98cm EKW UK04 0021E
Typical applications and installation location
These twin and combination flashings are intended for pitched roof installations where two VELUX roof windows are positioned vertically or where a combination of different window types are installed in close proximity. The 134x98cm dimensions suit standard UK roof pitches and are compatible with VELUX roof window ranges. Installation involves positioning the flashing system around the window openings to create a unified weatherproofing envelope that prevents water ingress at the critical junction between the roof structure and window frames.
- Dual-window installations on pitched roofs with standard UK angles
- Combination installations mixing different VELUX window types
- Situations where individual flashings would create complex overlaps or gaps
- New build and retrofit applications on pitched roof structures
Installation and on-site considerations
The integrated design of these combination flashings simplifies the installation process compared to fitting separate flashings for each window. The system is engineered to work as a coordinated unit, reducing installation complexity and the potential for gaps or misalignment between individual flashing components. Ensure the roof structure and window openings are prepared to the correct dimensions and that the flashing is positioned to allow proper integration with the roof covering and window frames. Follow VELUX installation guidance to ensure all weatherproofing seals are correctly seated and secured.
- Verify window opening dimensions match the 134x98cm flashing format
- Position flashing to integrate with roof covering and window frames
- Ensure all weatherproofing seals are correctly seated during installation
- Use compatible VELUX roof windows as specified by the manufacturer
Weatherproofing and maintenance
The integrated weatherproofing design prevents water penetration around window perimeters, a critical function in pitched roof installations where water run-off is continuous. The aluminium and synthetic component construction is engineered for long-term outdoor performance. Regular inspection of the flashing system, particularly after severe weather, will help ensure seals remain intact and water drainage pathways are clear of debris. Any damage to the flashing or seals should be addressed promptly to maintain weatherproofing integrity.
- Integrated design eliminates gaps between separate flashing components
- Aluminium and synthetic materials provide durable weatherproofing
- Inspect seals and drainage pathways regularly, especially after storms
- Clear any debris from around the flashing to maintain water run-off