How and where to use guide
VELUX Twin and Combination Flashings 78x98cm EKW MK04 0021E
Typical applications
Use this flashing when installing twin roof windows or combining different window types on pitched roofs. The 78x98cm size accommodates compatible VELUX window configurations positioned side by side. It is suitable for both new build projects and retrofit installations where you need to integrate multiple windows into a single weathertight assembly. The flashing works with standard tile and slate roof coverings commonly found on UK pitched roofs.
- Twin roof window installations on pitched roofs
- Combined installations mixing different VELUX window types
- New build and retrofit projects
- Roofs with tile or slate coverings
Installation and on-site use
The flashing arrives factory-fitted, which means the main assembly work is completed at manufacture. This reduces on-site assembly time and ensures consistent performance. Position the flashing to align with your roof pitch and the compatible VELUX window sizes you are installing. Ensure the flashing integrates properly with your existing tile or slate roof covering to maintain the weathertight seal across the entire installation. Follow VELUX installation guidance specific to your roof type and window configuration.
- Factory-fitted construction minimises on-site assembly
- Align flashing with roof pitch and window positions
- Integrate with tile or slate roof coverings
- Verify compatibility with your specific VELUX window sizes before installation
Maintenance and performance
The weathertight seal provided by this flashing depends on correct installation and ongoing maintenance. Regularly inspect the flashing and surrounding roof area for debris, moss, or damage that could compromise the seal. Keep gutters and roof surfaces clear to ensure water drains properly away from the flashing. Check that the flashing remains properly seated and that no gaps have developed between the flashing and roof covering.
- Inspect flashing regularly for debris or damage
- Keep roof surfaces and gutters clear
- Ensure water drains properly away from the installation
- Check for gaps between flashing and roof covering
Limitations and compatibility
This flashing is designed specifically for the 78x98cm window configuration and compatible VELUX window sizes. It is intended for pitched roofs only and is not suitable for flat roofs. Verify that your chosen VELUX windows are compatible with this flashing size before ordering. The flashing is designed to work with standard tile and slate coverings; compatibility with other roof materials should be confirmed with VELUX technical guidance.
- Designed for 78x98cm and compatible VELUX window sizes only
- Pitched roofs only, not suitable for flat roofs
- Confirm window compatibility before installation
- Standard tile and slate roof coverings; check compatibility with other materials