Fixing and buying guide

What this product is and who needs it

VELUX Standard Flashings are timber-based flashing kits that integrate rooflights into pitched roof structures. They are essential for anyone installing or replacing a VELUX UK04 rooflight, whether on new build or renovation projects. These flashings prevent water ingress around the rooflight opening and provide structural integration between the rooflight frame and roof covering. Builders, roofers, and experienced DIY installers working on residential or commercial properties will require this product.

Compatibility and sizing

These flashings are specifically designed for VELUX UK04 rooflights and measure 134 x 98 cm to match that rooflight size. They are compatible with roofs pitched at various angles, making them adaptable to most UK roof designs. Before purchase, confirm your rooflight model is UK04 and measure your roof pitch to ensure compatibility. The flashings accommodate different timber grades and building specifications, offering flexibility across construction types.

Material, finishes and pre-installation checks

The flashings are manufactured from FSC-certified softwood or hardwood timber, available in standard grey or brown finishes to suit different roof aesthetics and building styles. Before installation, inspect the flashing for damage or warping and ensure your rooflight frame is clean and level. Check that roof timbers around the opening are sound and properly sized to support the flashing. Verify that your roof covering material (tiles, slates, or felt) is compatible with the flashing type, and confirm adequate ventilation around the rooflight opening to prevent condensation.

• FSC-certified timber ensures sustainable sourcing
• Grey and brown finishes available for aesthetic choice
• Inspect for damage before fixing
• Ensure roof structure is level and sound
• Confirm roof covering compatibility

Installation and weather protection

The flashing creates a durable, watertight seal that protects against weathering and water ingress. Installation involves positioning the flashing around the rooflight opening and securing it to the roof structure and covering material according to VELUX guidance. The robust timber construction provides long-term roofing performance when properly installed and maintained. Ensure all joints are sealed and the flashing is fully integrated with your roof covering to maximise weather protection.

• Creates watertight seal around rooflight
• Durable construction for extended service life
• Requires proper sealing of all joints
• Must be fully integrated with roof covering