58
EXTERNAL ENVELOPE
Proctor Air®
delivers performance for the
future in historic roof as part of renovation P
roctor Air, the roofing membrane for the future developed by A. Proctor Group, is being installed as part of the renovation of Manchester Town Hall. Once construction work on the historic building, which is nearly 150-years old , is complete it will benefit from Proctor Air’s combination of vapour permeability and air permeability. At roof level, the restoration efforts include dismantling and rebuilding 30 of the 34 chimneys, and replacing 140,000 roof tiles. Removing the roof finish has afforded the opportunity to install a new pitched roof underlay. The project architects specified Proctor Air, with Mac Roofing & Contracting Ltd carrying out installation. A key advantage of Proctor Air, as an air permeable low-resistance (APLR) membrane, is that it removes the need for separate roof ventilation. In fact, it provides a more uniform flow of air in the roof space than normal vents, ensuring there are no ‘dead zones’
0.075MNs/g, Proctor Air is one of the highest performing vapour permeable membranes on the market.
Pitched roof underlays are a true ‘fit and forget’ product. Hidden from view,
they
where the complexity of the roof form could otherwise have restricted air movement. Air permeability performance is important, but must work alongside good vapour permeability performance. With an Sd value of 0.015m and a vapour resistance of
ADF09_A Proctor_External Envelop - Roofing :
Membranes_HPAdv.indd 1
attract little interest from building users but play a vital role in protecting people from the elements, and from unhealthy indoor climates. Proctor Air might be a modern product, but it is preserving the building’s heritage in its own way. When the weather-tight wrap and 3700 tonnes of scaffolding are finally removed from the Town Hall, the building and its users will benefit from a reliable, high performance APLR underlay. Thanks to the selection of Proctor Air, the roof should be capable of facing Manchester’s changing weather and climate for many years to come.
01250 872 261
proctorgroup.com/products/proctor-air 13/08/2024 15:57
WWW.ARCHITECTSDATAFILE.CO.UK
ADF SEPTEMBER 2024
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