Radical Retrofit, North Yorkshire

An extensive renovation of a 18th century stone barn that prioritises natural materials in the design. Pine king-post roof trusses are left exposed in the existing building, and a new Douglas fir in-the-round column and glulam beam structure is used in the new extension.

Studio Bio (UK Hempcrete’s in-house design studio) was engaged by the clients to detail the complete technical building envelope with bio-based materials, run moisture risk analysis and provide on-site hempcrete training.

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Our Design Studio

Established in 2019, our in-house design studio, Studio Bio, developed out of an industry demand for designers with a specialist knowledge of bio-based construction and detailing.

Our director, Alex Sparrow, leads a growing team, designing buildings from a material-first perspective, to ensure that the implications of building with hempcrete are considered from the very first drawing. To find our more about our services, click the button below.


We have a range of packages for each design stage to suit your project. Call us on 01629 343143 or email to discuss how we can get involved with your project! Alternatively, you can fill out our 2-minute contact form to tell us more about your project: