Fixing and buying guide

What this product is and who needs it

This flashing is an essential component for securing VELUX skylights to your roof structure. It creates a weather-tight seal around the skylight frame, preventing water penetration and ensuring long-term performance. You will need this flashing if you are installing or replacing a VELUX EDL MK04 0000 skylight or compatible VELUX models on a timber roof.

Compatibility and sizing

The 78 x 98cm dimensions are designed to fit standard roof spaces. This flashing is compatible with the VELUX EDL MK04 0000 skylight and multiple other VELUX skylight models. Before purchasing, confirm your skylight model matches the compatibility list and verify that your roof timber is graded F16 or above, as this is the minimum requirement for safe installation.

• Size: 78 x 98cm (30.5 x 38.6 inches)
• Suitable for timber grades F16 and above
• Compatible with VELUX EDL MK04 0000 and range of VELUX models
• Fits standard roof spaces

Pre-installation checks

Before fitting, inspect your roof timber to confirm it meets the F16 grade minimum. Check that your VELUX skylight model is listed as compatible with this flashing. Ensure the roof opening dimensions align with the 78 x 98cm flashing size. Verify that all components of your skylight kit are present and undamaged.

• Confirm roof timber grade is F16 or above
• Check skylight model compatibility
• Verify roof opening dimensions match flashing size
• Inspect flashing for damage before installation

Application and durability

This flashing is suitable for both new build and retrofit roof installations. The high-quality plastic construction provides durability and long-term weather resistance. Once properly installed around your VELUX skylight frame, it creates a secure, weather-tight seal that protects your roof structure from water ingress and maintains consistent performance regardless of application type.