15 Years of Retrofit Excellence

Our Portfolio

Over 15 years, we've worked on hundreds of projects—from Grade I Listed heritage buildings to modern Passivhaus developments. Our holistic approach combines building physics modeling, constraint analysis, and whole-life carbon accounting to deliver solutions that work across the entire building stock.

Case Study: Hamilton Square

One of our most challenging projects was Hamilton Square—a Grade I Listed building facing obsolescence due to high energy costs. Standard retrofit advice said you couldn't insulate a Grade I listed facade without compromising its historic character.

Using the OSMO framework, we identified breathable Internal Wall Insulation (IWI) solutions compatible with the building's solid stone construction. We used materials like wood fibre and aerogel that allow the building to breathe while dramatically improving thermal performance. For renewable energy, we integrated heritage-approved PV slates that matched the existing roof aesthetic while generating clean electricity.

The result: 90% reduction in operational heating demand, bringing the property closer to a Whole Life Net Zero standard—proving that heritage and performance are not mutually exclusive.

Consistent Results Across All Building Types

While Hamilton Square demonstrates our heritage expertise, our 15-year track record spans all building types. We've delivered successful retrofits for social housing providers, private developers, councils, and businesses—each project achieving 70-90% reductions in operational heating demand, bringing properties closer to a Whole Life Net Zero standard.

The OSMO methodology works because it's based on building physics, not assumptions. Whether you're working with solid stone walls, modern cavity construction, or anything in between, we provide PAS 2035-compliant solutions that deliver real results.