BDX insulation frames

VELUX BDX insulation frames are a type of an insulation frame with flexible foam between the roof construction and the window frame. This provides a tight and secure fit to the roof construction. BDX insulation frames turn the insulation and installation of the roof window into a simple process. BDX insulation frames are suitable with EDL / EDP / EDZ and EDW flashing kits and come complete with BFX underfelt collar.

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BDX insulation frames – advantages

BDX insulation frames are made of polyurethane foam with highly insulating properties. 

Main advantages:  

  • They effectively insulate around the roof window frame, reducing heat loss and eliminating the so-called thermal bridges;


  • They protect the window/roof connection from rainwater;


  • They make insulating and installing of the roof window a simpler process;


  • They are supplied with BFX underfelt collar and transverse drainage gutter;


  • They guarantee easy and quick installation thanks to new try squares placed on the perimeter of the insulation frame.


Why buy BDX insulation frames online

BDX insulation frames in the Fenbro offer come with a BFX underfelt collar to insulate around the roof window frame and ensure a weathertight seal. Contact our sales team for advice on the details of the installation process. Get the best quote and have your BDX insulation frames delivered in a safe and reliable way. 

How it works

Asking for a quote
Number One

Asking for a quote

Press ‘Get a quote’ button and submit your enquiry with the chosen joinery parameters.

Receiving the quote
Number Two

Receiving the quote

Our sales team will return to you with the purchase quote on joinery, delivery/installation costs and the lead time.

Number Three


Our employee will go through all the information included in the offer together with you.

Agreement and Payment
Number Four

Agreement & Payment

It is the stage where we confirm the contract and you make the payment.

Number Five


It’s the time it takes to produce your ordered joinery.

Number Six


This is the shipment period for your ordered products.

Number Seven


If you’re interested in our installation services, we agree on the dates individually.

Fenbro experts

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