Fakro XDK Set of Insulating Collars

Improve Insulation and Airtightness Around Roof Windows

The Fakro XDK Set of Insulating Collars is designed to help improve the thermal performance and airtightness of roof window installations. By connecting the window more effectively with the surrounding roof structure, the set helps reduce areas where heat can escape while improving the overall insulation of the installation.

Complete Insulating Collar Set

The XDK set includes two essential components, the XDP breather membrane collar and the XDS airtight flashing. Working together, these components help create a better-insulated and more airtight connection around the roof window, supporting improved energy efficiency and helping to reduce unwanted air and moisture ingress.

XDP Breather Membrane Collar

The XDP breather membrane collar connects the roof window with the surrounding roof system while providing additional insulation around the window. This helps minimise heat loss around the installation and supports a more thermally efficient roof window setup. The breather membrane design also helps integrate the window with the roof's external membrane, creating a practical connection between the two systems.

XDS Airtight Flashing

The XDS airtight flashing is fitted internally to help create an effective barrier against warm and humid air. It forms a seal between the internal window reveal and the plasterboard, helping improve the airtightness of the installation and reducing the risk of unwanted air and moisture entering the surrounding construction.

Help Reduce Thermal Bridging

When installed correctly, the XDK set helps address potential weak points around a roof window where thermal bridging can occur. By improving the insulation around the window and creating a more effective connection with the roof structure, the collars contribute to a more energy-efficient installation.

Available Sizes

The Fakro XDK Set of Insulating Collars is available in a comprehensive range of sizes to suit different roof window dimensions:

• 550 x 780mm
• 550 x 980mm
• 550 x 1180mm
• 660 x 980mm
• 660 x 1180mm
• 780 x 980mm
• 780 x 1180mm
• 780 x 1400mm
• 780 x 1600mm
• 940 x 1180mm
• 940 x 1400mm
• 1140 x 1180mm
• 1140 x 1400mm
• 1340 x 980mm
• 940 x 1600mm

With 15 size options available, the XDK can be selected to match a wide range of roof window dimensions. Choosing the correct size helps ensure the collars fit properly around the window and provide the intended insulation and airtightness benefits.

Why Choose the Fakro XDK Insulating Collar Set?

The Fakro XDK provides a straightforward way to improve the installation of a roof window by addressing both insulation and airtightness. The XDP breather membrane collar helps connect the window to the roof system and improve insulation around the frame, while the XDS airtight flashing helps prevent warm, humid air from passing into the surrounding construction. Together, they provide a more complete approach to insulating and sealing the roof window installation.

Frequently Asked Questions

What is included in the Fakro XDK Set of Insulating Collars?

The Fakro XDK set includes an XDP breather membrane collar and an XDS airtight flashing. The two components work together to improve insulation and airtightness around the roof window installation.

What is the purpose of the XDP breather membrane collar?

The XDP connects the roof window to the surrounding roof system while providing insulation around the window. It helps reduce heat loss and creates a more effective connection between the window and the roof's external membrane.

What does the XDS airtight flashing do?

The XDS is installed internally and helps create an airtight barrier against warm and humid air. It seals the connection between the internal window reveal and the plasterboard, helping reduce unwanted air and moisture ingress around the roof window.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

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• Competitive prices on leading brands and quality products.
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Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.

Multiple Products from the Same Supplier

If you're ordering multiple products from the same supplier, your order will be dispatched together once all items are ready. This means the longest lead time will apply.

If you need part of your order sooner, please call us on 01202 113233. We can arrange a split delivery, although an additional shipping charge will apply.