Fixing and buying guide

What this product is and who it is for

This is a specialist flashing designed specifically for multiple VELUX roof window installations on pitched roofs. It is for builders, roofers, and serious DIY installers who are fitting two windows side by side or combining different VELUX window types and need a single, integrated weathertight seal rather than individual flashings. The factory-fitted construction means the flashing arrives ready to install, saving time on site.

Compatibility and sizing

This flashing is sized at 78x98cm and is compatible with VELUX window configurations of this dimension. It works with both tile and slate pitched roof coverings. Before ordering, confirm that your window arrangement matches this size specification and that you are installing on a pitched roof. Check your VELUX window model numbers against the compatibility information to ensure this twin or combination flashing is the correct choice for your installation.

• Designed for 78x98cm VELUX window configurations
• Suitable for pitched roofs only
• Compatible with standard tile and slate roof coverings
• Verify window dimensions and roof type before purchase

Pack contents and pre-installation checks

This product is a single factory-fitted flashing unit. Upon delivery, inspect the flashing for any damage to the weathertight seal or frame. Check that the dimensions and product code EKW MK04 match your order. Ensure your roof opening is prepared to the correct size and that the surrounding roof structure is sound and ready to receive the flashing. Have all necessary roof covering materials (tiles or slates) and fixing components ready before installation begins.

• Inspect flashing for damage on arrival
• Confirm product code EKW MK04 and 78x98cm dimensions
• Prepare roof opening to specification
• Gather roof covering materials and fixings in advance

Installation benefits

The factory-fitted construction of this flashing eliminates on-site assembly, reducing installation time and the risk of assembly errors. The integrated design ensures a consistent weathertight seal across both windows or combined window types, providing reliable long-term weather protection. This approach is particularly valuable in retrofit work where precise sealing is critical.

• Factory-fitted reduces on-site assembly time
• Consistent weathertight performance across multiple windows
• Suitable for new build and retrofit installations
• Minimises risk of installation errors