How and where to use guide
VELUX Standard Flashings 134x98cm EDP UK04 0000
Typical applications and roof types
These flashings are designed for pitched roof installations where VELUX rooflights are being fitted into new or existing roof structures. They work across various roof pitches and angles, making them suitable for most domestic and light commercial UK roofing projects. The flashings accommodate different timber grades and building requirements, allowing flexibility in construction specifications. Standard grey and brown finish options mean you can match the flashing to your roof covering and building aesthetic.
- New rooflight installations on pitched roofs
- Retrofit rooflight projects on existing properties
- Roofs with varying pitches and angles
- Both softwood and hardwood timber roof structures
Installation and positioning
The flashing must be positioned around the rooflight opening to create a continuous watertight seal. Correct installation is critical to prevent water penetration at the junction between the rooflight frame and roof covering. The flashing sits beneath the roof tiles or slates above the rooflight and overlaps the covering below, directing water away from the opening. Ensure the flashing is level and properly secured to the roof structure before laying roof coverings.
- Position flashing to overlap roof covering above and below the rooflight
- Ensure watertight seal is maintained around the entire opening
- Secure flashing to roof structure before installing roof coverings
- Check alignment with rooflight frame before final fixing
Weather protection and durability
The FSC-certified timber construction provides robust, long-term weather protection when properly installed and maintained. The watertight seal is the primary defence against rain penetration, so maintaining the integrity of the flashing and its connection to roof coverings is essential. The timber will weather naturally over time; applying appropriate timber treatments or finishes can extend service life and maintain appearance, particularly for exposed edges.
- Watertight seal prevents water ingress around rooflight opening
- FSC-certified timber offers durability and environmental responsibility
- Inspect flashing annually for any gaps or damage to roof covering
- Consider timber treatment or finish maintenance to extend life
Limitations and on-site considerations
These flashings are engineered specifically for VELUX rooflights and must be used with compatible rooflight frames and sizes. The 134 x 98 cm dimensions are fixed, so verify your rooflight size before ordering. Installation requires competent roofing work; improper fitting will compromise the watertight seal and lead to water damage. The flashing is not suitable for flat roofs or rooflight installations outside the UK building context for which it is designed.
- Confirm rooflight size matches 134 x 98 cm flashing dimensions
- Use only with VELUX rooflights for which designed
- Not suitable for flat roof applications
- Installation should be carried out by competent roofers familiar with rooflight fitting