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VELUX Underfelt Collar The VELUX Underfelt Collar is a pleated material that is beneficial for reducing installation time. This is because it ensures a fast connection between the roof window and the roofing felt/membrane. It also helps protect against drafts and wind driven rain and snow around the window installation. It is supplied in one [...]
Installation Accessories
10 sizes available
10 sizes available
This product has multiple variants. The options may be chosen on the product page