How and where to use guide
VELUX Recessed Flashings 78x140cm EDN MK08 0000
Typical applications and installation
This recessed flashing is used to seal the gap between a rooflight or skylight frame and the surrounding roof structure. It is installed during new build roof construction or when replacing and re-flashing existing rooflights in renovation work. The flashing sits recessed into the roof plane, creating a flush integration that improves both appearance and water drainage. Installation requires the roof opening to be prepared to accommodate the 78cm × 140cm flashing dimensions, with the timber structure graded as F16 or F24 to ensure compatibility and adequate load-bearing capacity.
- New build rooflight installations in domestic and commercial properties
- Renovation and re-flashing projects for existing skylights
- Roof penetrations where a neat, flush finish is required
- Standard pitched roof construction with F16 or F24 timber grades
Structural and material compatibility
The 8mm thickness provides the structural integrity needed for roof applications, ensuring the flashing does not deflect under roof loads or foot traffic during installation and maintenance. The flashing is specifically designed for use with timber grades F16 and F24, which are standard structural timber grades used in UK roof construction. Ensure your roof structure meets these timber grade specifications before installation. The recessed design means the flashing integrates into the roof plane rather than sitting proud of it, reducing wind resistance and improving weather performance.
- 8mm thickness provides durability and structural support
- Compatible only with F16 or F24 grade timber
- Verify timber grading before commencing installation
- Recessed installation reduces exposure to wind and weather
On-site handling and maintenance
Handle the flashing carefully during delivery and storage to avoid denting or warping the 8mm profile, which could compromise the watertight seal. Store flat and protected from weather until installation. During installation, ensure all joints and edges are properly sealed according to VELUX guidance to maintain the watertight integrity. After installation, inspect the flashing periodically, particularly after severe weather, to confirm the seal remains intact and that no debris has accumulated around the rooflight frame. Clean gutters and drainage channels around the flashing to prevent water pooling.
- Store flat and protected from weather before installation
- Handle carefully to avoid denting the 8mm profile
- Ensure all joints and edges are properly sealed during installation
- Inspect periodically and keep drainage channels clear of debris