Proctor Air® : One Year On

May 2025 marks one year since the A. Proctor Group’s air permeable pitched roof underlay, Proctor Air ®, was awarded its BBA certificate.

Developed based on feedback from designers, specifiers and installers – and combined with the Group’s quarter of a century at the forefront of pitched roof membrane technology – Proctor Air is helping to shape best practice in the UK pitched roofing sector.

As an air permeable, low-resistance (APLR) pitched roof underlay, Proctor Air simplifies pitched roof constructions. It is one of the highest performing membranes on the market, allowing moisture vapour to escape the roof space and reducing condensation risk. Its air permeability

means no ventilation measures are required in warm, cold or room in the roof constructions. It also achieves a W1 resistance to water penetration classification and a minimum of 1m hydrostatic head.

In its first year, Proctor Air has been widely adopted by the UK pitched roof sector. Notable projects include Hatchmeadow apartments in Northumberland, where it featured in a 2500m2 replacement roofing system.

Proctor Air helped to protect residents during the work, as the building remained occupied throughout. The completed system stopped leaks that had previously affected some of the apartments. It has also been used on the prestigious £325m renovation of Manchester Town Hall, which is one of the biggest heritage projects in the UK.

The historic roof features many intricate details with limited opportunities to provide modern roof ventilation. Installing Proctor Air meant separate roof ventilation was not required, and there will be no ‘dead zones’ of restricted air movement in the complex roof.

An eye-catching advertising campaign positioned Proctor Air as “the air to the throne” throughout 2024. A triumphant night at December’s Construction Marketing Awards (CMAs) saw judges name the A. Proctor Group as winner in both the Best Product Launch category and the Best Advertising Campaign category.

Looking ahead to the rest of 2025, the A. Proctor Group continues to support specifiers and installers in adopting air permeable membranes. Forthcoming developments include new technical guidance on using Proctor Air with in-line solar PV panels.

Find out more: https://proctorgroup.com/products/proctor-air