Hempcrete Cymru
North Wales-based natural building company specialising in hempcrete, hemp blocks, and breathable floor and roof systems for new-build and retrofit projects.
About
Hempcrete Cymru is a North Wales-based construction company specialising in hempcrete and other natural building materials. Formed in 2020, the company works on new-build and retrofit projects across the UK, providing a route to affordable, high-performance, sustainable construction.
The company is directed by Ronan and Jasper. Ronan is a skilled stonemason and dry stone waller with extensive experience in restoration and renovation work, combining traditional stonemasonry with hempcrete construction. Jasper is a natural building specialist with expertise in hempcrete, breathable new-build and retrofit construction, and the repair of heritage buildings. The company holds memberships including Tŷ-Mawr Lime and the Alliance for Sustainable Building Products, and works alongside the Hemp Block Company and Llechen Lân.
Hempcrete Cymru's stated aim is to make low-impact construction the norm and remove the aspect of privilege from sustainability, often working with community groups to develop people-owned spaces. The company has completed builds across the UK, including projects in the Isle of Skye, County Durham, Pembrokeshire, Edinburgh and Cornwall, alongside its core work in Wales.
What they offer
- Hempcrete — Wet-cast hempcrete walls installed around a structural timber frame for new-build and retrofit projects, finished with lime, clay, or hemp plasters
- Hemp blocks — Pre-dried, off-site manufactured hemp-lime blocks used in new-build and retrofit, often combined with an external hempcrete layer
- Breathable floors — Insulated limecrete flooring systems over recycled foam glass insulation, with optional underfloor heating
- Warm roof systems — Hempcrete roof insulation between rafters with breathable carrier boards and a wood fibre airtight layer
- Timber framing — Structural and decorative timber framing using traditional joinery and locally sourced, slow-grown timber
- Finishes — Breathable lime, clay, and hemp plasters for internal and external use
- Material supply, training and consultancy services — Available on request
Notable projects
- Snowdonia Stone Cottage Extension, Snowdonia National Park — New-build hempcrete extension to an existing traditional Welsh stone cottage
- Sudley Changing Rooms Retrofit, Liverpool — Hempcrete retrofit converting former changing rooms into a Therapy and Wellbeing Centre
- Y Stiwdio, Hermon — Welsh Government-funded conversion of an old industrial plot into a community-owned space for creative projects
- One Planet Development, Llansadwrn — Two-storey new-build hempcrete house on a roundwood frame built by Tŷ Pren
- Hempcrete Extension, Isle of Skye — New-build hempcrete extension on the Isle of Skye
- Barn Retrofit, Fife — Hempcrete and lime plaster retrofit of a barn in Fife
Project photos
Photo: Hempcrete Cymru
Photo: Hempcrete Cymru
Photo: Hempcrete Cymru
Photo: Hempcrete Cymru
Photo: Hempcrete Cymru
Photo: Hempcrete Cymru