Fixing and buying guide

Who this product is for

This flashing is for builders, roofers, and serious DIY installers fitting Velux roof windows in side-by-side arrangements on pitched tile roofs. It suits both new roof installations and refurbishment work where weathertightness and secure mounting are essential.

Compatibility and sizing

The EKW CK01 2021M is engineered for compatible Velux roof windows in side-by-side configuration only. The flashing dimensions are 550×700mm, which corresponds to specific Velux window sizes. Before ordering, confirm that your Velux windows are compatible with this flashing type and that the 550×700mm size matches your installation requirements. Check your window documentation or contact Velux technical support if you are uncertain about compatibility.

• Designed for side-by-side Velux window installations
• Flashing dimensions: 550×700mm
• Verify window compatibility before purchase
• Not suitable for single window installations or other roof window brands

What is included and installation features

The flashing comes complete with the BDX bracket, which provides secure, stable mounting to the pitched tile roof. The centre pivot operation allows straightforward ventilation and maintenance access to the windows once installed. The classic design delivers a weathertight seal between the window frame and roof surface, with durable, low-maintenance construction.

• BDX bracket included for secure roof mounting
• Centre pivot operation for ventilation and access
• Weathertight seal on pitched tile roofs
• Low-maintenance, durable construction

Pre-installation checks

Before fitting, ensure your roof structure is sound and the tile surface is clean and in good condition. Confirm that the roof pitch is suitable for tile flashing installation and that you have adequate access and working space for safe installation. Verify that all compatible Velux windows are to hand and that you have the correct flashing size for your window configuration. Review the installation instructions supplied with the flashing and the window manufacturer's guidance to ensure proper sequence and technique.