Order Helpline 01752 692 760

VELUX BDX 2000 Insulation & Underfelt Collar

Product Code:
Est. Delivery: Select option below
Shipping costs displayed in basket.
We can let you know when this product is back in stock.

This product is proving to be very popular and has unfortunately sold out.

Enter your email below and we'll notify you as soon as this product is back in stock:

Subject to stock availability, if products on a 24 hours service are ordered alongside products NOT on a 24 hours service, this may delay your whole order.

View Transport Policy

All delivery charges are included in the final shopping basket and are dependent on the products Scottish Highlands & the Islands where additional shipping charges will apply.

Please note that not all products will incur an additional delivery charge to the Scottish Highlands & the Islands – this is based on the costs from the manufacturer, distributor or courier providing shipping on our behalf. If your delivery address is in the Scottish Highlands and Islands, a member of our helpline team will contact you prior to processing your order should an additional delivery charge apply.

While we make every effort to ensure orders are delivered by the date required, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules.

Any variation to web delivery date given will be advised to you by email or telephone. If we are unable to make delivery because access is not possible, we reserve the right to make a failed delivery charge.

£36.00 Incl. VAT
Oops! Please select from the options


This BDX insulation collar comes with a BFX underfelt collar to insulate around the roof window frame and ensure a weathertight seal. 

Insulating and fitting a window is an easier process with both insulation collar and underfelt collar coming with a click fitting. Made from diffusion open material to minimise the risk of condensation, underfelt collars also come with welded corners and a transverse drainage gutter to lead water away from the top of the window if any roof tiles or slate are broken. 


Size BK04 - 47 x 98cm
CK01 - 55 x 70cm
CK02 - 55 x 78cm
CK04 - 55 x 98cm
CK06 - 55 x 118cm
FK04 - 66 x 98cm
FK06 - 66 x 118cm
FK08 - 66 x 140cm
MK04 - 78 x 98cm
MK06 - 78 x 118cm
SK10 - 114 x 160cm


There are no product downloads to show.

Questions & Answers

There are currently no questions for this product.

Have a question about this product?


5 / 5 6 reviews
Mr. David Cansdale
Reviewing VELUX BDX CK01 2000 Insulation and Underfelt Collar - 55cm x 70cm
7th March
Very pleased with service
Reviewing VELUX BDX CK04 2000 Insulation and Underfelt Collar - 55cm x 98cm
3rd October 2021
Long wait for the delivery but it wasn't surprising with the current situation.All great ,highly recommended!
Peter Gent
Reviewing VELUX BDX CK04 2000 Insulation and Underfelt Collar - 55cm x 98cm
28th July 2020
Very fast delivery, items packaged well for delivery
Mr Tahir Mahmood
Reviewing VELUX BDX FK08 2000 Insulation and Underfelt Collar - 66cm x 140cm
30th May 2020
makes fitting the Velux easy and hassle free
Reviewing VELUX BDX CK02 2000 Insulation and Underfelt Collar - 55cm x 78cm
12th April 2020
Amazing product and great service
Colin Impey
Reviewing VELUX BDX CK06 2000 Insulation and Underfelt Collar - 55cm x 118cm
8th February 2020
As always a brilliant product
Sorry, there was a problem loading the reviews. Please try again.

Products We Recommend


Product Enquiry Form

VELUX BDX 2000 Insulation & Underfelt Collar

*Required Field

Would you like to empty your basket?

Yes No


It seems you are running an older version of Internet Explorer. Our site does not support these old browsers as they do not house the technology that allows our site to be safe and secure.

If you wish to access our site please either upgrade your browser or download an alternative.