Klober Permo extreme RS SK2 is a weatherproof underlay designed for use on low pitched roofs
Permo extreme RS SK2 from Klober – a leading manufacturer of high-performance roofing membranes, ventilation and accessories – is a waterproof, tear-resistant underlay, designed for use on low pitched roofs.
Suitable for profile tiles pitched at 12.5o or more, 15o for slates and 22.5o for plain tiles; it is manufactured from a bondable two-layered underlay with a shrink-resistant TPU coating on a robust PES (polyethersulphone) fleece which allows vapour to escape, while keeping rain water out.
Double self-adhesive edge strips provide a permanent seal and immediate weatherproofing against wind, rain and snow; while the PES fleece also incorporates a capillary stop to control the formation of condensation. This means that if left, Permo extreme can provide a temporary weatherproofing layer if required.
With a high-temperature stability that peaks at 100°C and due to the fact that it is very UV-resistant, it also means that Permo extreme is suited for installation under in-roof system solar panels.
Another attribute of Permo extreme is that it dispenses with the need for plywood or OSB support boards and counter battens – which the company estimates saves at least £8 per m2 in materials, not to mention time and labour costs.
It can also be used as a bondable underlay for a rainproof sub-roof. Not only is it tear-resistant, highly weatherproof and avoids the need for sarking boards, it also – when laid as a key primary barrier with its associated accessories – comes with a 10-year guarantee providing that it has been installed in accordance with Klober’s installation instructions.
The underlay is complemented by a range of accessories such as Permo extreme sealant which allows connection to rising structural components and eave flashings; an EPDM sealing collar suitable for the sealing of pipe penetrations; and Butylon tape, which is ideal for creating seals around nail penetrations.