How and where to use guide
VELUX Twin and Combination Flashings 134x98cm EKW UK04 S0222
Typical applications and suitability
This flashing is designed specifically for VELUX roof ventilator installations on domestic and commercial pitched roofs. It is suitable for roof pitches between 30 and 60 degrees and works with structural timber grades F16, F24, and F36. The 134 x 98 cm dimensions accommodate standard VELUX ventilator units. Use this flashing when installing new VELUX ventilators or replacing existing flashings to maintain a watertight seal and prevent water damage to the roof structure and interior spaces below.
- VELUX roof ventilator installations on pitched roofs between 30–60 degrees
- Compatible with timber grades F16, F24, and F36
- New installations and replacement of existing flashings
- Domestic and commercial roofing applications
Installation and adjustment
The twin and combination design of this flashing allows straightforward installation and adjustment to suit your specific roof pitch and ventilator position. Position the flashing around the VELUX ventilator unit before securing to the roof structure, ensuring the watertight seal is properly formed. The combination style accommodates different roof angles within the 30–60 degree range, reducing the need for multiple flashing types on roofs with varying pitches. Ensure the flashing sits flush against the roof surface and ventilator unit to maintain the watertight seal.
- Position flashing around VELUX ventilator before final securing
- Adjust to suit roof pitch between 30–60 degrees
- Ensure flush contact with roof surface and ventilator unit
- Twin design allows flexibility for varied roof angles
Maintenance and on-site tips
Inspect the flashing regularly to ensure the watertight seal remains intact and free from debris, leaves, or moss growth that could compromise water drainage. Check that the flashing sits properly against the ventilator unit and roof surface, particularly after severe weather or roof work. Keep gutters and roof surfaces around the ventilator clear to allow water to drain away effectively. If the seal shows signs of deterioration or water ingress occurs, the flashing should be inspected and resealed or replaced as necessary to prevent damage to the roof structure and interior.
- Inspect regularly for debris, leaves, or moss around the flashing
- Ensure water drains away from the flashing and ventilator unit
- Check the seal remains intact after severe weather
- Replace if deterioration or water ingress is detected