Leading manufacturer of roofing accessories, Klober, is celebrating 25 years of its Permo Forte 145 underlay, one of the first vapour permeable membranes to transform the UK roofing market.   When launched back in the late 1990s, this type of vapour permeable membrane represented a turning point in roofing design. Permo Forte offered a breathable alternative to traditional bitumen felts, helping contractors tackle widespread condensation issues that had long affected roof per