Fixing and buying guide

What this product is and who needs it

These are timber flashings that seal the gap between a VELUX rooflight frame and your roof surface. They prevent water ingress and weather damage at the rooflight perimeter. You need them if you are installing or replacing a VELUX rooflight, skylight or compatible solar panel on any roof type. They are essential for a weathertight installation and are suitable for both trade installers and experienced DIY customers familiar with rooflight fitting.

Compatibility and sizing

These flashings are specifically designed for VELUX rooflights and skylights, and are compatible with VELUX solar panel installations. The 134 x 98cm size is fixed, so you must verify that your rooflight model matches this flashing size before purchase. They work on flat roofs, pitched roofs and walls, giving you flexibility across different roof pitches and applications. Check your rooflight documentation or contact VELUX directly if you are unsure of the correct flashing size for your window.

• Confirm your VELUX rooflight model number before ordering
• Suitable for flat, pitched roofs and wall installations
• Compatible with VELUX solar panel systems
• Fixed size 134 x 98cm — not adjustable

What you receive and material

You receive timber flashings with weather-resistant treatment applied. The timber construction allows for secure fixing to your roof structure and provides a traditional, durable seal around the rooflight. The weather-resistant treatment protects the timber from rain, frost and UV exposure, extending the life of the installation. Multiple timber grades and finishes are available, so you can select an option that suits your building aesthetic and budget.

Pre-installation checks

Before fitting, inspect the rooflight frame and surrounding roof area for damage, rot or poor condition. Ensure the roof surface is clean and dry. Confirm that the rooflight is correctly positioned and level before securing the flashings. Check that all fixing points on the roof structure are sound and capable of taking fasteners. Have appropriate roofing sealant, flashing tape and fasteners ready — these are typically not included with the flashings themselves.

• Verify rooflight model matches this flashing size
• Inspect roof structure and rooflight frame for damage
• Ensure roof surface is clean and dry before fitting
• Gather sealant, tape and fasteners separately