Project Description

POWERBASE® Gas & hydrocarbon barriers

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New Homes in Hull Regeneration Area

Named after Hull’s famous aviator, the Amy Johnson development by Keepmoat Homes on Hawthorn Avenue is a major project building new homes for sale and for social rent through Places for People. The Hawthornes @ Amy Johnson is part of Hull City Council’s programme of regeneration of the area, which also included improvements to the exterior of existing homes.

Keepmoat Homes have completed the first phase of 148 homes, with a further 491 being constructed. The project includes three-bedroom homes as well as affordable housing. Prior to construction beginning, an assessment of the site determined varying levels for NHBC required gas protection measures. Specialist installers of gas barrier membranes and waterproofing tanking systems, SPS Substructure Protection Ltd, chose two high-performance membranes produced by Industrial Textiles & Plastics Ltd (ITP) of North Yorkshire. Protecting some of the homes is Powerbase VOC, a specially engineered multilayer composite barrier membrane with exceptional resistance to hydrocarbons and VOCs (volatile organic compounds). Under other homes, Powerbase Multigas 300 has been installed. This is an aluminium laminate incorporating a foil between two layers of LDPE and a reinforcing scrim.

“Our expertise in gas and chemical resistant technology, developed over more than 25 years, means we can provide the right solution for any installation,” said Paul Harrison, ITP’s geomembrane technical advisor. “We are adding new products, such as tanking membranes and DPCs to complete our existing products, creating an integrated, comprehensive groundworks solution for specifiers and installers.”

In addition to the Powerbase range of gas barrier membranes, ITP also produces the industry-leading Puraflex barrier membrane, as well as a range of advanced building membranes and temporary containment solutions, including flame retardant materials.

Powerbase Multigas 300 Installation

Project Details


The Hawthornes @ Amy Johnson


Hull, East Riding of Yorkshire


Powerbase® VOC Hydrocarbon and Chemical Barrier Membrane
Powerbase® Multigas 300 Gas Barrier Membrane


SPS Substructure Protection Ltd


Keepmoat Homes

Powerbase Multigas 300 Installation
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