Part of The Specialist membrane range, Permo Extreme 200 is a tear-resistant roof underlay designed for use on low pitched roofs, down to a minimum roof pitch of 12.5° for interlocking tiles, 15° for slates and 22.5° for plain tiles. This makes Extreme 200 roof membrane the perfect solution for extensions, particularly as the roll is available in a half-size for smaller projects. The membrane is fleece lined to control condensation, whilst it’s fitted with self-adhesive tape, which provides a permanent seal of overlaps and immediate weatherproofing protection against wind, rain and snow.