How and where to use guide
VELUX Twin and Combination Flashings 94x160cm EKP PK10 0021E
Typical applications and roof types
These combination flashings are suitable for pitched roof installations on properties with traditional tile or slate finishes. The EKP PK10 specification is engineered for standard pitched roof pitches commonly found in UK residential construction. The 94x160cm aperture size is designed for situations where two roof windows are installed in close proximity, such as on sloped roofs where vertical stacking or side-by-side positioning creates a dual-window arrangement. This flashing system is particularly effective on projects where reducing installation complexity and minimising additional sealant work is a priority.
- Pitched roof installations with tile or slate finishes
- Dual roof window installations with standard spacing
- Residential and commercial roofing projects
- Situations where integrated weatherproofing reduces on-site joinery
Installation and on-site use
The flashing system comprises integrated upper and lower components that work together to create a unified seal. During installation, position the flashing around the roof window aperture, ensuring the upper and lower elements align correctly with the window frame and surrounding roof structure. The aluminium and synthetic rubber composition provides durability and flexibility to accommodate roof movement. The unified design minimises the need for additional sealant and separate flashing pieces, streamlining the installation process on multi-window projects. Ensure the flashing sits flush against both the window frame and the roof surface to maintain the water-resistant barrier.
- Position upper and lower components to align with window frame and roof structure
- Ensure the flashing creates a continuous seal around the aperture
- Minimise additional sealant requirements by using the integrated design
- Check that all components sit flush to maintain weatherproofing integrity
Maintenance and performance
The aluminium and synthetic rubber materials are designed to withstand exposure to UK weather conditions. Periodically inspect the flashing to ensure the seal remains intact and that no debris has accumulated around the window-to-roof interface. The integrated upper and lower components should be checked to confirm they remain properly seated. Clean the flashing surface as part of routine roof maintenance to prevent moss or lichen growth that could compromise water drainage. The unified design reduces the number of joints and seams compared to separate flashings, which lowers maintenance requirements and improves long-term weather resistance.
- Inspect the flashing seal regularly for signs of wear or separation
- Clear debris from around the window-to-roof interface
- Clean the flashing surface to maintain water drainage
- Check that upper and lower components remain properly aligned