Cornerstone announces strategic price reduction on SuperTherm

19 May 2026

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Driven by the growing need to reduce energy consumption and improve the performance of existing building stock, SuperTherm Plaster offers a highly effective and sympathetic solution for solid masonry structures where conventional insulation systems are often unsuitable. Moving forward, SuperTherm will be available at the new retail price of £22.85, down from the original £34.62.

“We’ve worked closely with our partners to obtain a new exclusive agreement, while streamlining the supply chain and investing in our own manufacturing plant, so we can ensure those savings are passed directly on to the community.”

chris brown, managing director

Millions of traditional buildings struggle with ineffective insulation, and as demand grows, we’re ready to scale production and make sure SuperTherm is accessible and affordable.

The price reduction comes on the back of strong results from recent projects, including the Market House Pilot Project, which has helped demonstrate SuperTherm’s performance in demanding conservation environments.

“Improving the thermal performance of a building like the Market House is one of the toughest retrofit challenges, because any solution must deliver meaningful insulation improvements while remaining fully compatible with the building fabric. We’ve shown not just in the lab, but through independent in-situ testing, as little as 35mm of SuperTherm can improve the U-value of a solid wall by more than 75%.”

ADAM BROWN, COMMERCIAL director

Looking to learn more about SuperTherm? Explore the Market House Pilot Project Case Study.

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