How and where to use guide
VELUX Twin and Combination Flashings 94x140cm EKL PK08 S0222
Typical applications and roof types
This flashing system is designed for pitched roof window installations on domestic and light commercial properties. It is suitable for standard tile and slate roof pitches where a single VELUX window or multiple window configurations require weatherproofing. The integrated design makes it ideal for new-build installations or retrofit projects where simplifying the flashing assembly is a priority. The 940×1400mm aperture size matches PK08 VELUX windows, so confirm your window dimensions before ordering.
- Pitched roof installations with standard tile or slate coverings
- Single or multiple VELUX window configurations
- New-build and retrofit applications
- Domestic and light commercial properties
Installation and on-site handling
The twin and combination flashing is supplied as a single integrated unit, which simplifies the installation sequence compared to separate upper and lower flashings. Position the flashing around the window aperture, ensuring it sits correctly on the roof pitch and integrates with the surrounding roof covering. The aluminium and polymer composite construction is durable but should be handled carefully on site to avoid damage. Ensure the flashing is fully bedded and sealed according to VELUX installation guidance to maintain weatherproofing performance. Check that water shedding pathways are clear and unobstructed before completing the installation.
- Handle the integrated flashing unit carefully to avoid bending or denting
- Position the flashing to suit the roof pitch and window aperture alignment
- Ensure full bedding and sealing around the perimeter
- Verify water shedding pathways are clear and unobstructed
- Follow VELUX installation guidance for your specific roof type
Performance and maintenance
The integrated design reduces thermal bridging and maintains the window's thermal performance by minimising the number of separate components and joints. The flashing is engineered to provide consistent water shedding across standard roof pitches, protecting the window frame and roof structure from water ingress. After installation, inspect the flashing periodically—particularly after severe weather—to ensure seals remain intact and debris has not accumulated around the window perimeter. Clean gutters and roof surfaces regularly to prevent water pooling or blockages that could compromise performance.
- Inspect seals and joints periodically, especially after severe weather
- Clear debris and leaves from around the window and flashing
- Check that water drains freely from the lower flashing
- Do not apply excessive force or attempt to adjust the flashing after installation
Limitations and important notes
This flashing is sized specifically for 940×1400mm apertures (PK08 windows) and is not suitable for other window dimensions. It is designed for pitched roof applications only and is not appropriate for flat roofs or non-standard roof pitches. The integrated twin and combination design is optimised for standard tile and slate roof coverings; compatibility with other roof materials should be verified before purchase. Always refer to the product code EKLPK08S0222 when ordering to ensure the correct flashing for your window size and roof type.
- Confirm your window aperture is 940×1400mm (PK08) before ordering
- Not suitable for flat roofs or non-standard roof pitches
- Designed for standard tile and slate roof coverings
- Do not attempt to modify or cut the flashing to fit other window sizes