For use with Fakro and Optilight roof windows.

An air permeable underfelt collar is used for easy fitting of the window, in conjunction with the air permeable sheeting used in roof construction. Manufactured using the highest quality air permeable membrane (EUROTOP). The sides of the collar are pleated, so that they can be placed directly onto roof battens, irrespective of the spacing between them or their thickness. The corners are strengthened with a flexible, long-lasting and water resistant butyl tape. Collars should be chosen according to window size.

* must be used in conjuctiuon with main flashing kit.  Related flashing kits for Fakro and Optilight roof windows are below.