Proctor Air achieves BBA certification – ADC


Following its successful launch in 2024, Proctor Air has now been issued with a BBA certificate.Specifiers, housebuilders and roofing contractors therefore have the all-important verification from an independent third party that the membrane performs as claimed. As a fourth-generation family business with a history of technical innovation and promoting good practice, A Proctor Group advocates working with certification bodies like the British Board of Agrément to bring new product technologies to the market.

Proctor Air fits that category, being a roofing membrane designed for the future. It simplifies pitched roof constructions thanks to being both air permeable and vapour permeable. In addition, its water holdout performance and wind uplift resistance ensure it is able to cope with more frequent extreme weather driven by climate change.


“An Agrément certificate assesses a construction product’s fitness for purpose,” said Iain Fairnington, Technical Director at A Proctor Group. “Having a BBA certificate for Proctor Air shows we have had the product tested and assessed in relation to its intended use.”

A Proctor Group enjoyed a collaborative relationship with the BBA while getting Proctor Air certified. Monthly meetings with the designated BBA project manager ensured both parties could update each other on progress, and maintain ongoing dialogue with regard to testing schedules and product sample needs. Certification showing that a third-party has tested and verified the performance of a product gives the construction industry confidence that a manufacturer’s claims are genuine and accurate.


Proctor Air has an Sd value of 0.015m and a vapour resistance of 0.075MNs/g, making it one of the highest performing vapour and air permeable membranes on the market. It is an air-permeable, low-resistance (APLR) underlay, which provides a more uniform flow of air through the roof space than normal vents.

Key benefits include:

  • Vapour permeable
  • Fully air permeable
  • Highly water resistant
  • More uniform airflow than vents
  • Wind uplift resistance complies with BS5534
  • No VCL required
  • 15-year warranty
  • BBA certified


A unique feature within Proctor Air’s BBA certificate is the clarification that it can be used on roofs featuring solar PV, as long as appropriate consideration is made to the requirement of a ventilated batten/counter batten space. This recommendation is in line with current requirements for tightly jointed slates, tiles and metal sheet, all of which may also normally be considered air impermeable, and therefore the addition of a ventilated batten/counter batten, above the Proctor Air, is required, as per BS 5250.

For more information, please visit the A Proctor Group website.

Source: Architecture Today