Building Services Industry Has Two Years to Fix Indoor Air Quality
A policy paper launched at the Building Engineering Services Association’s World Ventilation Day event suggests there is a “two-year window of...
Read Full ArticlePitched roofing membrane company A. Proctor Group has launched its latest innovation in water-resistant roofing underlay.
Proctor Air, an air and vapour-permeable and water-resistant roofing underlay, has been developed in response to a demand for higher thermal efficiency.
The underlay features a hydrophobic additive in all three layers for increased water holdout. It also has an air permeability of 35 m3/m2.hr.50Pa and an Sd-value of 0.02m.
Proctor Air has a Hydrostatic Head of water of over 1m as recommended by NFRC Technical Bulletin 6.
Under BS 5534, Proctor Air can be used in Wind Zones 1-4 at a maximum 345mm battens centres without additional tape. At the same time, it reduces the risk of issues occurring in roof spaces due to poorly installed VCLs or ventilation, since neither is needed. This means Proctor Air can be specified on all roof types not just without low- and high-level ventilation, or a vapour control layer.
Picture: a photograph of a grey roof. Image Credit: Pexels
Article written by Ella Tansley | Published 13 February 2024
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