Proctor Group membranes used in next-gen SIP technology

Factory-fitted Proctor Group membranes were part of the successful construction of the Ultrapanel demo house.

The building envelope for a three-bedroom home, from sole plate to ridge, was erected in a single day using Ultrapanel Building Technologies’ Category 2 MMC SIP system.

The system features the vapour permeable Proctorwrap Reflect membrane in its external wall panels. An innovative new cold roof panel features the air permeable, low resistance (APLR) Proctor Air underlay.

The two membranes allow SIP panels to be delivered straight to site and installed quickly, providing a watertight building envelope in a matter of hours. Panels can be specified to meet a range of regulations and standards (including the Passivhaus standard), while minimising risks associated with moisture.

Proctor Group worked closely with Ultrapanel Building Technologies to establish membrane specifications tailored to the offsite manufacture of the panels.

For example, Proctor Air is usually supplied in 1m wide rolls, to allow for easier manual handling on the roof. However, in a factory environment, the production line can handle heavier products. Proctor Group therefore supplied a bespoke 3m wide roll to suit the width of the cold roof panels.

Proctor Group’s Sales Director, John Johnston, attended the demo house construction day and said: “At a time when labour costs are so expensive, Ultrapanel’s SIP system will likely be very appealing to housing associations, and social housing providers in particular. That could make a real difference to whether the UK can achieve its ambitious housing targets.”

www.proctorgroup.com/products/proctor-air