How and where to use guide
VELUX Twin and Combination Flashings 55x98cm EKW CK04 0021E
Suitable applications and roof types
These flashings are designed for pitched roof installations where a VELUX window or roof opening requires watertight sealing. They are compatible with timber roof construction using F16, F24, or F36 grades, which covers the majority of domestic and light commercial pitched roof projects. The 55x98cm size suits standard roof openings and the combination flashing element accommodates varying roof pitches, making this product versatile across different roof angles and configurations.
- Pitched roof installations with standard roof openings
- Timber-framed roofs graded F16, F24, or F36
- Both DIY and professional roofing projects
- Roofs with varying pitches and angles
Installation and on-site adjustment
The twin flashing design facilitates straightforward installation with the ability to adjust on-site to suit your specific roof conditions. Position the flashing around the roof opening, ensuring the durable weather-resistant coating faces outward to shed water effectively. The combination element of the flashing allows you to accommodate the particular angle and pitch of your roof, which is essential for maintaining the watertight seal. Take time during installation to ensure the flashing sits flush against the roof surface and timber frame.
- Position flashing around the roof opening before securing
- Use the combination element to adjust for your roof pitch
- Ensure the weather-resistant coating faces outward
- Check that the flashing sits flush against roof and timber frame
- Make on-site adjustments as needed before final fixing
Weather resistance and maintenance
The durable weather-resistant finish on these flashings is engineered to perform reliably across varied weather conditions. To maintain long-term performance, inspect the flashing periodically, particularly after severe weather, to ensure it remains properly seated and that no debris has accumulated around the edges. The watertight seal depends on the flashing remaining in good contact with the roof surface, so check that no movement or lifting has occurred. Clean away any moss, leaves, or dirt that may collect around the flashing to prevent water pooling.
- Inspect flashing regularly for movement or lifting
- Clear debris and leaves from around the flashing edges
- Check the watertight seal remains intact after severe weather
- Ensure no water pooling occurs around the flashing perimeter
Limitations and compatibility
These flashings are specifically designed for timber roof grades F16, F24, and F36. Do not use on roofs constructed with other timber grades or non-timber roof structures without confirming compatibility. The 55x98cm size is suited to standard roof openings; if your opening dimensions differ significantly, you may need alternative flashing sizes. The flashing is designed for pitched roofs and is not suitable for flat roof applications.
- Compatible only with F16, F24, and F36 timber grades
- Designed for pitched roofs, not flat roofs
- 55x98cm size suits standard roof openings
- Confirm timber grade and roof pitch before purchase