How and where to use guide

Suitable applications and roof types

This recessed flashing is engineered specifically for tile roofs and is compatible only with VELUX PK08 roof window systems. The 94×140cm dimensions are designed to suit standard rafter spacing in residential properties. Use this flashing in new build projects where you are installing a PK08 window from the outset, or in refurbishment work where you are replacing an existing PK08 window or upgrading from another system. The recessed profile allows the flashing to sit neatly within the roof plane, providing a visually consistent finish that blends with your tiling.

• Tile roofs only
• PK08 window systems exclusively
• New build and refurbishment projects
• Standard rafter spacing applications

Installation and on-site guidance

Install this flashing as part of the complete VELUX roof window assembly. The flashing must be positioned before the roof window frame is secured and before final tiling or slating. Ensure the flashing sits flush with the roof structure and that all edges are properly sealed to prevent water penetration. The aluminium and synthetic components are engineered to work together as an integrated system. Always follow VELUX installation instructions and ensure compatibility with your specific roof pitch and tile type. Poor installation or use with incompatible window systems will compromise the weather-tight seal.

• Install before securing the roof window frame
• Position flashing flush with roof structure
• Seal all edges thoroughly to prevent water ingress
• Use only with compatible VELUX PK08 systems and accessories
• Follow manufacturer installation instructions precisely

Maintenance and durability

The aluminium and synthetic materials are engineered to perform reliably in typical UK roof conditions, including exposure to rain, wind, and temperature fluctuations. Inspect the flashing periodically as part of routine roof maintenance to ensure the seal remains intact and that no debris or moss has accumulated around the edges. Keep gutters and roof surfaces clear to allow water to drain properly. The recessed design minimises standing water and helps maintain long-term weatherproofing performance. Do not attempt to repair or modify the flashing; if damage occurs, contact VELUX for replacement components.

• Inspect regularly during routine roof maintenance
• Keep roof surface and gutters clear of debris
• Monitor seal integrity around window edges
• Do not modify or repair; replace if damaged

Limitations and compatibility

This flashing is designed exclusively for PK08 roof windows and cannot be used with other VELUX window sizes or non-VELUX systems. It is suitable for tile roofs only and is not appropriate for slate, metal, or other roof coverings. The 94×140cm dimensions are fixed and suit standard rafter spacing; non-standard roof configurations may require alternative solutions. Always verify compatibility with your specific roof window model and roof type before ordering. Using this flashing with incompatible systems or roof types will result in poor weatherproofing and potential water damage.