Fixing and buying guide
VELUX Twin and Combination Flashings 66x118cm EBP FK06 0021B
Who this product is for
This flashing is suitable for builders, roofers, and experienced DIY customers installing or repairing roof openings. It works for new builds, extensions, and roof repairs where a standard 66×118cm opening is required.
- Pitched roofs up to 30 degrees maximum pitch
- Flat roof installations
- New builds and renovation projects
- Standard roof opening sizes
Sizing and compatibility
The 66×118cm dimensions are designed for standard roof openings. Before ordering, measure your roof opening carefully to confirm this size is suitable for your installation. The flashing is compatible with both flat and pitched roof structures up to 30 degrees pitch. If your roof pitch exceeds 30 degrees or your opening size differs significantly from these dimensions, you will need a different flashing specification.
- Measure your roof opening before purchase
- Maximum roof pitch: 30 degrees
- Standard opening size: 66×118cm
- Check roof structure compatibility
Product construction and durability
The flashing is manufactured from FSC-certified softwood timber, 32mm thick, with a natural oil-based finish. This treatment provides inherent rot and insect resistance, extending the product lifespan and reducing maintenance. The timber-framed design allows the flashing to integrate naturally with your roof structure whilst maintaining a watertight seal against wind-driven rain and snow.
- FSC-certified 32mm thick softwood frame
- Natural oil-based protective finish
- Rot and insect resistant
- Watertight seal against weather
Pre-installation checks
Before fitting, inspect your roof opening to ensure it matches the 66×118cm specification and that your roof pitch does not exceed 30 degrees. Check that the roof structure is sound and level, and that the surrounding roof surface is clean and free from debris. The combination flashing design allows for adjustment during installation, but proper preparation of the opening will ensure the best fit and seal. Ensure you have appropriate safety equipment and access arrangements for working at height.
- Confirm roof opening size matches 66×118cm
- Verify roof pitch is 30 degrees or less
- Inspect roof structure for soundness
- Clean the roof opening area thoroughly
- Plan safe access and working arrangements