Fixing and buying guide

What this product is and who it is for

This is a flashing kit for VELUX rooflight installations. It creates the weather-tight seal between the rooflight frame and the surrounding roof or wall structure. It is suitable for builders, roofers, and experienced DIY customers installing or replacing VELUX roolights on flat roof or wall applications where timber framing is present.

Compatibility and sizing

The 78 x 98cm dimensions are designed for standard VELUX rooflight openings. Before ordering, confirm that your rooflight opening matches these dimensions. The flashings are compatible with timber grades F16, F24, F32, F36, F40, F44, F48, F52, F60, F64, F72, F80, F90, and F96, as well as S2S (stress-graded) stock. Check your project specification and timber grade to ensure compatibility.

• Size: 78 x 98cm (30 x 38.6 inches)
• Material: High-quality plastic construction
• Compatible with F16 through F96 timber grades and S2S stock
• Suitable for flat roof and wall installations

What is included and pre-installation checks

This is a Twin and Combination Flashing kit. Before installation, verify that the rooflight opening dimensions match 78 x 98cm and that your timber framing grade is listed in the compatibility range. Ensure the roof or wall surface is clean, dry, and ready to receive the flashing. Have suitable fixings available—follow current site practice and VELUX installation guidance for the specific fixing method appropriate to your roof construction and timber type.

Installation and fixing

Install the flashings using suitable fixings appropriate to your roof type and timber grade. The high-quality plastic construction provides durability and weather resistance when correctly fitted. Follow current best practice and VELUX technical guidance for your specific application. Ensure the flashing is fully seated and secured to create a complete weather-tight seal around the rooflight frame.