How and where to use guide
VELUX Twin and Combination Flashings 55x78cm EKW CK02 S0122
Typical applications and suitability
This flashing is specifically engineered for flat roof rooflight installations where a VELUX unit requires secure integration with the roof deck. The 55x78cm dimensions accommodate standard rooflight openings. The timber-grade construction provides durable performance in exposed roof conditions, delivering long-term protection against the elements. Confirm your rooflight model and opening dimensions match this flashing size before purchase to avoid fitting issues on site.
- Flat roof rooflight installations only
- Standard VELUX rooflight models requiring 55x78cm flashing
- Exposed roof locations subject to wind-driven rain and snow
- New installations or rooflight replacement projects
Installation and fixings
Install the flashing in line with VELUX manufacturer guidance to ensure watertight performance. The flashing must be secured to the roof deck using suitable fixings appropriate to your roof construction and local building regulations. Position the flashing to create a seamless seal between the rooflight unit and the surrounding roof surface, ensuring water is directed away from the opening. Timber-grade construction requires careful handling on site to prevent damage during installation.
- Use fixings specified by VELUX for your roof type
- Follow VELUX installation instructions precisely
- Ensure flashing sits flush and level with roof surface
- Check watertight seal before completing installation
- Protect timber during storage and handling to prevent moisture damage
Maintenance and durability
The timber-grade construction delivers reliable long-term performance when properly installed and maintained. Inspect the flashing annually, particularly after severe weather, to confirm the seal remains intact and no water ingress has occurred around the rooflight perimeter. Keep gutters and roof surfaces clear of debris to prevent water pooling around the flashing. Any damage to the timber or seal should be addressed promptly to maintain watertight protection.
- Annual inspection of flashing seal and timber condition
- Clear debris from roof and gutters to prevent water pooling
- Address any timber damage or seal deterioration immediately
- Monitor for water staining or damp around rooflight interior
Limitations and important notes
This flashing is designed exclusively for flat roof applications and VELUX rooflight integration. Do not use on pitched roofs or with non-VELUX rooflight units. The 55x78cm size is fixed and cannot be cut or modified on site. Confirm timber grade and treatment type against your project specification before ordering, as these affect durability in your specific climate and exposure conditions. Installation must comply with current building regulations and VELUX manufacturer requirements.
- Flat roof applications only
- Compatible with VELUX rooflights only
- Fixed dimensions—cannot be cut or resized
- Verify timber grade and treatment before ordering
- Installation must follow VELUX guidance and building regulations