How and where to use guide

Typical applications and installation

This flashing is designed specifically for use with VELUX rooflights and skylights in pitched roof construction. The 78 x 98cm size suits standard roof window openings. Installation involves positioning the flashing around the window frame before securing the roofing material, creating a continuous seal that directs water away from the opening. The flashing must be installed before roof tiles, slates, or other weathering materials are fitted to ensure proper water management and prevent leaks at the critical junction between window and roof.

• Install before roof covering materials are laid
• Position flashing to overlap roof tiles or slates above the window
• Ensure flashing sits flush against the window frame on all sides
• Use with VELUX rooflights and skylights of compatible dimensions

Material compatibility and timber considerations

The EKL MK04 specification indicates this flashing is suitable for use with various timber grades and finishes. The durable PVC construction resists weather damage and UV exposure, making it compatible with oak, pine, spruce, and other common roofing timber. The PVC material will not rot or degrade when in contact with different timber types, providing a long-lasting seal regardless of your chosen timber grade or finish.

Weather resistance and maintenance

The PVC construction provides excellent weather resistance against rain, wind, and temperature fluctuations typical of UK roof conditions. Once installed, the flashing requires minimal maintenance. Periodically check that the seal remains intact and clear of debris, particularly after severe weather. Ensure guttering and downpipes are functioning correctly to prevent water pooling around the flashing area.

• Inspect annually for any gaps or separation from the window frame
• Clear moss, leaves, and debris from around the flashing
• Check that roof tiles or slates remain properly seated over the flashing edges
• Monitor for any signs of water staining on interior ceilings below the window

On-site handling and limitations

Handle the flashing carefully during transport and installation to avoid creasing or cracking the PVC. This product is designed specifically for roof windows and openings; it is not suitable for vertical wall installations or ground-level applications. The 78 x 98cm size is fixed and cannot be cut or modified without compromising the watertight seal. Ensure the roof opening dimensions match the flashing specifications before ordering to avoid installation problems.