Fixing and buying guide

Who this product is for

This flashing is intended for builders and experienced DIY installers working on timber frame roof construction projects. It is suitable if you are installing or replacing flashings around roof penetrations such as chimneys, vents or skylights on properties with timber frame construction. You should be comfortable working at height and following detailed installation instructions to ensure a watertight seal.

Compatibility and sizing

The EKW MK04 S0122 is graded for EKW timber frame construction and is compatible with standard roofing materials used in conjunction with flashings. The 78 x 98cm dimensions suit roof penetrations and installations within this size range. Before ordering, measure your roof opening or penetration to confirm this flashing size is appropriate for your application. Check that your timber frame is EKW graded to ensure compatibility.

• Size: 78cm length x 98cm width
• Material: Timber-grade plastic
• Grade: EKW (timber frame compatible)
• Suitable for chimneys, vents and skylights

Pre-installation checks

Before fixing, inspect the flashing for any damage or defects. Ensure your roof structure and timber frame are sound and dry. Check that the opening or penetration is clean and free from debris, and that surrounding roofing materials are in good condition. Confirm that the flashing dimensions match your installation requirements and that you have all necessary fixings and sealants to hand. Read the manufacturer's installation instructions carefully to understand the correct positioning and sealing method for your specific application.

• Inspect flashing for damage before installation
• Ensure roof opening is clean and properly sized
• Check timber frame condition and grade
• Gather all fixings and sealants before starting work

Installation and performance

Install the flashing according to VELUX manufacturer's instructions to ensure it sits correctly and maintains its protective barrier against water ingress. Proper positioning and sealing are critical to the flashing's performance. The durable timber-grade plastic construction is designed to resist weathering when installed correctly. Once fitted, the flashing will work with your roofing materials to provide comprehensive weatherproofing around the penetration.

• Follow manufacturer's installation instructions precisely
• Ensure flashing sits correctly and is fully sealed
• Use appropriate fixings and weatherproof sealant
• Check seal integrity after installation