How and where to use guide
VELUX Twin and Combination Flashings 114x118cm EBW SK06 0021B
Suitable applications and roof types
These flashings are primarily designed for flat roof installations but can also be used on pitched roofs where necessary. They are specifically compatible with EBW roofing materials and should be selected when installing or replacing roof openings with this roofing system. The 114x118cm size is appropriate for standard roof opening dimensions. Always verify that your roof opening matches the flashing dimensions before ordering to ensure a proper fit.
- Flat roof applications (primary use)
- Pitched roof applications (where required)
- Compatible with EBW roofing materials only
- Standard roof opening sizes up to 114x118cm
Installation and positioning
Install the flashing during roof construction or when replacing existing roofing materials. The flashing must be positioned to overlap the roofing material correctly, creating a continuous weather-tight barrier. Position the flashing so that water will run down and away from the opening rather than pooling or running back towards the roof structure. On pitched roofs, ensure the flashing is angled appropriately to shed water downslope. Secure the flashing according to the manufacturer's instructions to prevent wind uplift.
- Install during new roof construction or re-roofing work
- Ensure proper overlap with EBW roofing materials
- Position to direct water away from the opening
- Secure firmly to prevent wind damage
Weather resistance and durability
The durable plastic construction is engineered to withstand wind-driven rain and snow loads typical of UK weather conditions. The material resists degradation from UV exposure and temperature fluctuations. However, correct installation is essential for the flashing to perform as intended. Any gaps, misalignment, or inadequate securing will compromise the weather-tight seal and allow water ingress.
- Plastic construction resists wind-driven rain and snow
- Tolerates UK weather extremes and UV exposure
- Performance depends on correct installation
- Check regularly for any movement or gaps after severe weather
Maintenance and on-site tips
Inspect the flashing annually and after severe weather events to ensure it remains secure and properly sealed. Clear any debris, moss, or leaves that accumulate around the flashing, as these can trap moisture and compromise the seal. Do not attempt to repair damaged plastic flashings with temporary sealants; replace the flashing if it becomes cracked or warped. Store the flashing flat and protected from direct sunlight before installation to prevent warping.
- Inspect annually for movement, cracks, or gaps
- Clear debris and vegetation from around the flashing
- Replace rather than repair if plastic becomes damaged
- Store flat and out of direct sunlight before use