How and where to use guide
VELUX Twin and Combination Flashings 94x160cm EBL PK10 0021B
Typical applications and suitability
These flashings are designed specifically for standard roof window openings on pitched roofs in UK building applications. They work with VELUX roof window systems and are suitable for both new installations and replacement work. The 94x160cm size accommodates standard roof window dimensions. The twin and combination flashing design allows you to adapt installation to different roof pitches and covering materials, whether you are working with clay tiles, concrete tiles, slate, or other pitched roof coverings.
- New roof window installations on pitched roofs
- Replacement flashing work on existing roof windows
- Multiple window installations (10 units per pack)
- Roofs with varying pitch angles and tile configurations
Installation and alignment
Careful positioning is critical for effective weatherproofing. The flashing must be aligned precisely with your roof pitch and integrated properly with the surrounding tile or slate course. The aluminium and lead composite construction allows some flexibility for bending and shaping to match your specific roof configuration. Ensure the flashing sits securely within the roof opening and that all edges are properly sealed and integrated with the roof covering above and below the window frame. Follow VELUX installation guidance for your specific window model to ensure compatibility and correct positioning.
- Align flashing with roof pitch before securing
- Integrate with existing tile or slate courses
- Ensure watertight seal at all edges
- Check compatibility with your VELUX window model
Weatherproofing and maintenance
The flashing's primary function is to prevent water ingress by creating a barrier between the window frame and roof structure. The aluminium and lead composite material provides durability and weather resistance. After installation, inspect the flashing periodically to ensure it remains properly seated and that no gaps have developed around the window frame or roof covering. Clear any debris from around the flashing to maintain effective water drainage. Check that sealant or pointing around the flashing edges remains intact and reapply if necessary to maintain weatherproofing performance.
- Inspect flashing annually for gaps or movement
- Clear debris from around the window and flashing
- Check sealant integrity and reapply as needed
- Ensure water drains freely from the flashing edges
On-site handling and limitations
Store flashings flat and protected from damage before installation. The composite material can be carefully shaped to suit your roof pitch, but avoid excessive bending or creasing. Each pack contains 10 units, suitable for multiple window installations. These flashings are designed for pitched roof applications only and are not suitable for flat roofs. Ensure you have the correct flashing size and type for your specific VELUX window model before beginning installation work.
- Store flat and protected from weather and damage
- Pitched roofs only – not suitable for flat roofs
- Verify correct size and type for your window model
- Handle composite material carefully to avoid creasing