Fixing and buying guide
VELUX Twin and Combination Flashings 134x140cm EKN UK08 S0021E
What this product is and who needs it
This is a coupled recessed flashing for use with VELUX roof windows and Sun Tunnel systems on slate roofs. It sits between your roof window or Sun Tunnel frame and the slate tiles, creating a weather-tight seal that prevents water ingress. You need this flashing if you are installing a VELUX roof window or Sun Tunnel on a property with 8mm recessed slate roofing, whether you are carrying out new build work or refurbishing an existing roof.
- Twin and combination flashing for dual or multiple roof window installations
- Recessed design specifically for 8mm slate roofing material
- Creates a weather-tight, professional finish on slate roofs
- Suitable for new build and refurbishment projects
Compatibility and sizing
This flashing is sized at 1340 x 1400mm and is compatible with VELUX roof window and Sun Tunnel systems. Before ordering, confirm that your roof windows or Sun Tunnels are VELUX products and that your slate is 8mm recessed specification. Check the product code EKN UK08 S0021E against your VELUX documentation or contact VELUX technical support if you are unsure whether this flashing matches your installation.
- Dimensions: 1340 x 1400mm
- Designed for VELUX roof windows and Sun Tunnels only
- For 8mm recessed slate roofing only
- Verify compatibility with your specific VELUX product before purchase
Pre-installation checks and preparation
Before fitting, inspect your slate roof to confirm it is 8mm recessed specification and in sound condition. Check that your VELUX roof window or Sun Tunnel frame is ready for installation and that all components are present. Ensure the roof structure is properly prepared and that you have the correct tools and sealants recommended by VELUX for slate installation. This is a specialist product requiring professional installation to guarantee a weather-tight finish and compliance with building regulations.
- Confirm slate is 8mm recessed type and in good condition
- Verify VELUX roof window or Sun Tunnel is present and ready
- Gather all necessary sealants and fixings as per VELUX guidance
- Professional installation is strongly recommended for weather-tight performance
Installation and durability
This flashing is engineered for reliable performance in typical UK roof conditions and provides long-term durability when installed correctly. The recessed design ensures a neat, consistent roof finish that integrates visually with your slate. Once fitted, the flashing creates a weather-tight seal that protects your roof window or Sun Tunnel installation from water ingress and weather exposure. Follow VELUX installation instructions carefully and ensure all seals are properly applied.
- Engineered for UK roof conditions and long-term durability
- Recessed design for a neat, professional appearance
- Weather-tight installation protects against water ingress
- Follow VELUX technical guidance for correct fitting and sealing