Fixing and buying guide

What this product is and who it is for

These flashings are designed to seal the edges of skylights and rooflights, preventing water ingress around roof penetrations. They are suitable for both trade installers and experienced DIY customers working on roof extensions, conservatory installations and flat roof projects in domestic or commercial settings. The plastic construction provides durability and weather resistance in exposed roof conditions.

Compatibility and substrate suitability

The EKW CK02 S0312 flashings are compatible with timber frames graded S1 and S2, as well as concrete slabs and brickwork substrates. Before purchasing, confirm that your roofing substrate matches one of these types. If you are installing onto timber, verify the timber grade specification for your project. These flashings are designed specifically for roof penetrations and should not be used for other applications.

• Suitable for timber (S1 and S2 grades), concrete and brickwork
• Designed for skylights, rooflights and roof penetrations
• Plastic construction resists weathering and UV exposure

Sizing and measuring before you buy

This flashing is sized at 55 x 78cm (21.6 x 30.7 inches). Measure the dimensions of your skylight or rooflight opening carefully and confirm these measurements match the product size before ordering. The flashing must fit securely around the perimeter of your roof penetration to ensure a proper watertight seal. If your opening dimensions differ significantly from this size, you may need a different flashing product.

• Product size: 55 x 78cm
• Measure your skylight or rooflight opening before ordering
• Confirm dimensions match your project requirements

Pre-installation checks and preparation

Upon delivery, inspect the flashing for any damage to the plastic material or sealing edges. Check that the product code EKW CK02 S0312 matches your order. Before installation, ensure your roof substrate is clean, dry and free from debris. Confirm that your roofing material and substrate type are compatible with this flashing system. Follow VELUX manufacturer installation instructions carefully to achieve a proper watertight seal. If you are uncertain about any aspect of the installation, consult the manufacturer guidance or seek professional advice.

• Inspect flashing on arrival for damage
• Verify product code matches your order
• Clean and prepare the roof substrate before fixing
• Follow manufacturer installation instructions for watertight sealing