Fixing and buying guide

Who this product is for

This flashing is for builders, roofers, and experienced DIY customers installing or maintaining VELUX rooflights on flat roof applications. It is not suitable for pitched roofs or non-VELUX rooflight systems. You will need basic roofing knowledge and the ability to work safely at height.

Compatibility and sizing

The EKW CK02 S0122 is a twin and combination flashing measuring 55 × 78 cm. Before ordering, confirm that this size matches your VELUX rooflight model and your project specification. Check the rooflight documentation or contact VELUX directly if you are unsure which flashing type or size your installation requires. Using the wrong size or type will compromise the watertight seal.

• Designed specifically for VELUX rooflights on flat roofs
• 55 × 78 cm dimensions suit standard rooflight installations
• Twin and combination type — verify compatibility with your rooflight model before purchase
• Not suitable for pitched roof applications

What you need to install

The flashing itself is timber grade construction. You will need to source suitable fixings separately — these are not included. Refer to VELUX installation guidance or the rooflight manufacturer's instructions for the correct fixing type, size, and spacing. Improper fixings or installation can lead to leaks and structural failure.

• Suitable fixings (not included — consult VELUX installation instructions)
• Roofing sealant or membrane as specified by VELUX
• Basic roofing tools: hammer, drill, spirit level, tape measure
• Safety equipment: harness, ladder, roof boards if required

Pre-installation checks

Inspect the flashing on delivery for damage, splits, or warping. Check that the timber grade and treatment are as specified on your order. Confirm the rooflight unit is in good condition and that the roof structure is sound, level, and ready to receive the flashing. Review the VELUX installation manual thoroughly before starting work. Ensure weather conditions are suitable — do not install in heavy rain or high winds. If you are uncertain about any aspect of the installation, consult VELUX technical support or a qualified roofer.