The A Proctor Group says that it will be exhibiting the benefits of both airtight membranes for walls (Wraptite System) and breather membranes for roofs (Roofshield) at this year’s Ecobuild in London, which will be held on March 3 to 5 2015 at the Excel exhibition centre. The company claims that its Roofshield vapour and air permeability characteristics allow even …