How and where to use guide
VELUX Recessed Flashings 94x160cm EDJ PK10 0000
Suitable applications and roof types
These recessed flashings are engineered specifically for flat roof installations where a roof window or opening measuring 47 x 100mm needs weather protection. The recessed design is particularly effective on flat roofs as it allows water to run off the flashing surface and away from the opening rather than pooling. They are not suitable for pitched or sloped roofs. Always verify your roof opening dimensions match the 47 x 100mm specification before ordering, as incorrect sizing will compromise the weather seal.
- Flat roof applications only
- Roof opening size: 47 x 100mm
- Flashing dimensions: 94 x 160cm
- Suitable for professional and serious DIY installation
Installation and fixing
Installation must follow current best practice and VELUX manufacturer guidance. The flashing should be positioned to create a recessed seal around the roof opening, with the recessed design allowing water to shed away from the opening. You must use appropriate fixings suitable for your roof construction material, whether that is timber, concrete, or metal decking. Ensure the flashing sits flush and level, and all fixings are secure and corrosion-resistant. Do not attempt installation in adverse weather conditions, and allow adequate time for any sealants or adhesives to cure fully before exposing the roof to water.
- Follow VELUX manufacturer installation guidance
- Use corrosion-resistant fixings appropriate to your roof type
- Ensure flashing sits level and flush with roof surface
- Allow sealants to cure fully before water exposure
- Install in dry conditions for best results
Maintenance and durability
The durable construction of these flashings is designed for long-term performance on flat roofs. Periodically inspect the flashing and surrounding roof area to ensure the seal remains intact and water is shedding correctly. Check that fixings remain tight and that no debris has accumulated around the flashing that might trap water. In areas with heavy rainfall or where guttering is nearby, more frequent inspection may be warranted. Clean the flashing surface gently if algae or moss growth occurs, using soft brushing rather than pressure washing, which could damage the seal.
- Inspect flashing and seal regularly
- Check fixings remain secure
- Clear debris that could trap water
- Clean gently if algae growth occurs
- Do not use high-pressure washing
Important limitations and safety
These flashings are designed for flat roofs only and will not perform correctly on pitched roofs. The 47 x 100mm opening size is specific, so measure your roof opening carefully before installation. Working at height on roofs carries significant risk; ensure you use appropriate fall protection and scaffolding. If you are not confident in roof work, engage a qualified roofer. Always follow current building regulations and best practice standards for your region. Confirm all product dimensions and specifications against your project requirements before ordering.
- Flat roofs only – not suitable for pitched roofs
- Verify roof opening is exactly 47 x 100mm
- Use fall protection when working at height
- Comply with current building regulations
- Consult a qualified roofer if unsure