Fixing and buying guide

Who this product is for

This flashing is intended for anyone installing or replacing VELUX rooflights in timber-framed roofs. It suits both experienced builders and competent DIY installers who are comfortable working at height and following manufacturer guidance. If you are fitting a new rooflight or resealing an existing installation, this product provides the weatherproofing layer needed to prevent water penetration around the rooflight frame.

Compatibility and sizing

The EDP CK04 0000 flashing is compatible with VELUX rooflights and timber roof structures of grades F16 and F24. The product is supplied in two lengths—55cm and 98cm—allowing you to cut the flashing to the exact size required for your rooflight opening on site. Before ordering, measure your rooflight frame perimeter and select the length that best suits your installation, or order both lengths if you need flexibility.

• Suitable for timber grades F16 and F24 only
• Available in 55cm and 98cm lengths
• Can be cut to size on site to fit your rooflight frame
• Designed specifically for VELUX rooflight applications

Pre-installation checks

Before fitting, confirm that your roof timber is graded F16 or F24 and that your rooflight is a VELUX model compatible with this standard flashing system. Inspect the rooflight frame and surrounding timber for any damage, rot, or structural issues that must be remedied before installation. Ensure the roof surface is clean and free from debris around the installation area, and check weather forecasts to plan your work during dry conditions.

• Verify timber grade (F16 or F24) before installation
• Check rooflight frame for damage or deterioration
• Clear the roof area of debris and obstructions
• Plan installation during dry weather

Installation overview

The plastic flashing is designed for straightforward installation around your VELUX rooflight. Position the flashing around the rooflight frame, ensuring it sits flush and level, then secure it according to VELUX installation instructions. The plastic material is durable and weather-resistant, providing a long-term watertight seal. Always follow the detailed fitting guidance supplied with your rooflight and this flashing to ensure correct installation and maintain warranty cover.

• Position flashing flush around the rooflight frame
• Secure according to VELUX installation instructions
• Ensure the seal is watertight before completing work
• Refer to manufacturer guidance for full fitting details