ROOF WINDOW
FLASHING KITS

Roof window flashings are essential for creating a safe, secure, and fully watertight connection between your roof window and the roofing material, protecting your property from water ingress and long-term damage. At The Roofing Merchant, we supply a comprehensive range of roof window flashings for VELUX, Dakea, and Keylite roof windows, all available to order online with reliable nationwide delivery.

We stock a wide selection of flashing kits designed to suit most roof types and materials, making it easy to find the correct solution for your project. Our range includes flashings for natural slate roofs, interlocking roof tiles, and plain roof tiles, as well as options for different roof pitches and installation requirements. Whether you’re installing a new roof window or replacing an existing unit, our flashing kits are manufactured to ensure a precise fit, long-lasting performance, and compliance with manufacturer guidelines.

With competitive pricing, clear product descriptions, and fast delivery across the country, The Roofing Merchant makes it simple to buy roof window flashings online with confidence. Choose from trusted brands including VELUX, Dakea, and Keylite, and ensure your roof window installation is completed to the highest standard.

Which Velux flashing kit do I need?

The flashing kit you need depends on the type of roof covering and the roof pitch.

EDW flashing – for interlocking and profiled tiles
EDL flashing – for slate roofs
EDP flashing – for plain tiles
EDU flashing – for slate roofs where a conservation window is being fitted
EDT flashing – for flat interlocking tiles (profile depth less than 40mm)
EDN flashing – for slate roofs where a recessed window is being fitted
EDJ flashing – for interlocking profile tiles where a recessed window is being fitted

Always check the roof pitch and roof tile profile before selecting a flashing.

Which Dakea flashing kit do I need?

The right flashing depends on your roof material and profile:

Dakea KUF Universal Large Tile Flashing Kit – For high profile tiles (16–120 mm).
Dakea Flashing Kit KTF – For most profiled tiles (16–50 mm), such as concrete or ceramic.
Dakea KLS Slate Flashing (one piece) – For slate roofs
Dakea KSF Slate Soaker Flashing – For slate roofs up to 8mm thick natural slate.
Dakea KFP Plain Tile Flashing – For plain tiles up to 14 mm thick.

Choosing the correct model ensures proper fit and prevents water ingress.

Low Pitch Flashing

Keylite Roof Window Flashing Deep Tile DTRF for Low Pitch
Price£94.50
Sales Tax Included

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WINDOWS

FAQs

Which flashing is best for Velux windows with Planum Low Pitch Roof Tiles?

For Velux windows installed on low pitch roofs, the recommended option is a Velux GBL Low Pitch Roof Window . This window is supplied with a flashing specifically made to work on low pitch roofs with interlocking roof tiles like the Planum from La Escandella. You can order this window directly from our stock by visiting our Roof Windows Page.

What roof pitch can Dakea flashings be used with?

Most Dakea flashings are suitable for roofs with pitches between 15° and 90°, making them compatible with a wide range of roof types. Some specialised flashings (like plain tile flashings) may have specific pitch recommendations, so always check the product guidelines before ordering.

Do I need a flashing kit for a Velux window?

Yes. A Velux flashing kit is essential to ensure a watertight seal between the roof window and the roof covering. The correct flashing kit prevents leaks, improves weather resistance, and ensures the window performs as designed.

Can Velux windows be fitted on low pitch roofs?

Velux windows can be fitted on low pitch roofs when used with compatible flashing kits and installed within the specified pitch range. The recommended option is a Velux GBL Low Pitch Roof Window . This window will work on roof pitches down to 10 degrees and is supplied with the flashing kit as a complete package. For more advice on specifying products for low pitch roofs speak to our expert team at the Roofing Merchant. We specialise in low pitch roof solutions.

Which flashing is best for Velux windows on interlocking tiles?

For Velux windows installed on interlocking roof tiles, the recommended option is a Velux EDW flashing kit. This flashing is specifically designed to work with profiled and interlocking tiles, ensuring a watertight seal and long-term durability when fitted correctly.

How do I choose the right flashing for my roof?

To choose correctly:

Identify your roof material (slate, plain tile, profiled tile, metal).
Check the profile height of your tiles or sheets.
Match it with the appropriate Dakea flashing model listed above.
If you’re unsure, contact us — we’re happy to help you select the correct flashing for your roof window.

ROOF WINDOW FLASHING KITS