Price From: £22.68 (inc. VAT) £18.90 (ex. VAT)

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The VELUX Under felt Collar is used to ensure a weather tight deal between your roof window and the roof. The collar comes with transverse drainage gutter to ensure a weather tight seal.

Underfelt Collar Installation Instructions

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Design Tool

Assist with window selection and all insulation components

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Price From: £22.68 (inc. VAT) £18.90 (ex. VAT)
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Further Detail

The VELUX BFX 1000 Underfelt Collar is used to ensure a weather tight seal between the Roof Window and the roof. It is made from a special diffusion open polypropylene to minimise the risk of condensation and it comes with a transverse drainage gutter to lead water away from the head of the window if a tile or slate is broken above the window. The BFX 1000 will give that added reassurance for a low cost. The BDX 2000 package comes with the BFX 1000 and you get an insulation collar as well.