Fixing and buying guide
VELUX Twin and Combination Flashings 78x140cm EKW MK08 S0222
What this product is and who needs it
These flashings are purpose-made sealing components for VELUX rooflights measuring 78cm × 140cm. They sit between the rooflight frame and the roof deck, creating a watertight barrier. You need these if you are installing or replacing a VELUX rooflight of this specific size, or if your existing flashing has failed or been damaged. The twin and combination design accommodates various roof configurations and pitches.
- Essential for weather-tight rooflight installation
- Prevents water leaks around the rooflight perimeter
- Durable plastic construction resists rot and insect damage
- Suitable for both new installations and replacements
Compatibility and sizing
These flashings are sized exclusively for VELUX rooflights of 78cm × 140cm dimensions. They are compatible with timber roof structures graded F16, F24, F36, and F44, which covers the standard softwood and hardwood timbers used in UK construction. Before ordering, confirm your rooflight dimensions and check your roof timber specification to ensure compatibility.
- Rooflight size: 78cm × 140cm only
- Timber grades: F16, F24, F36, F44
- Verify your rooflight model matches this size
- Check roof timber grade documentation
Finishes and appearance
The flashings are available in three finishes: white, grey, and brown. Choose the finish that best matches your roof covering or architectural style. The plastic construction maintains colour stability and does not require painting or staining.
- White finish for light-coloured roofs
- Grey finish for slate or tile roofs
- Brown finish for traditional or darker roofing
Pre-installation checks
Before fitting, inspect the rooflight frame and surrounding roof structure for damage, rot, or deterioration. Ensure the roof opening is correctly sized and that the rooflight frame sits level and square. Check that all roof timbers are sound and free from insect damage. Have the correct roofing materials ready for sealing around the flashing, such as roofing felt, battens, and tiles or slates as appropriate to your roof type.
- Verify rooflight frame is undamaged and level
- Check roof opening dimensions match the flashing size
- Inspect timber for rot or insect damage
- Prepare roofing materials for final weatherproofing