A significant challenge when working on the roof of any existing, occupied building is protecting the people inside the building without the full roof system in place. At Hatchemeadow apartments in Northumberland, operated by the housing association, Bernicia, a key performance characteristic of Proctor Air that helped to address these challenges was its water holdout. That, combined with its vapour and air permeability, offered long-term peace of mind for the building owners, as well as apartment residents. Problems with the existing roof specification were causing some residents to experience leaks during periods of poor weather. Bernicia tasked Wensley Roofing with stripping back the existing roof and installing a new system.
James Roy, Senior Quantity Surveyor at Wensley Roofing, describes the replacement roof system as a “belt and braces” approach. “The specification used Proctor Air over the rafters, followed by counter battens, tile battens, and a new pantile finish,” he explained. “Some of the residents were having to use buckets to catch leaking water,” said James. “Since installing this new system the leaks have now stopped, and there has been some bad weather.” As a roofing underlay, Proctor Air’s key function is as a low-resistance (LR), vapour-permeable membrane. Proctor Air is one of the highest performing vapour-permeable membranes on the market. As well as vapour permeability, Proctor Air provides air permeability. At Hatchmeadow apartments, the reroofing offered the opportunity to top up the insulation in the roof and provide extra thermal comfort. However, with all the work carried out externally, it wasn’t possible to also check on the continuity and integrity of any vapour control layer below the insulation. Using Proctor Air meant this was not an issue. www.proctorgroup.com
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