Project details
- Project name: Sheep Field Barn
- Location: Perry Green, Hertfordshire
- Project type / Sector: Cultural
- GIA: 749 m2
Project team
- Client: Henry Moore Foundation
- Structural engineer: Webb Yates
- Architect: DSDHA
- Cost consultant: Stockdale
- MEP engineer: Harley Haddow
- Main contractor: Rooff
Project description
Retrofit of an existing barn building into a new learning hub at the Henry Moore Foundation’s headquarters in Perry Green, Hertfordshire.
DSDHA’s design extends the Sheep Field Barn Gallery, built over 20 years ago on the rural site. Webb Yates developed the structural design for a fully timber extension to the existing steel portal shed. This lightweight, elegant solution allows the structure to remain exposed internally, reducing finishes and celebrating frame’s form.
0.3 tonnes of existing steel elements were reused without re-fabrication. The components were cut to length and drilled on site, with all modifications carried out by a traditional fabricator.
Reuse facts
Angles from masonry restraint, box section from a large sliding door and PFC with attached angle, were all sourced from the existing building.
No testing was required as the elements were not re-fabricated, just cut to length and drilled on site for fixings.
During Stage 3, inspections of the existing structure and design development revealed an opportunity to replace precast lintels with existing steelwork on site.
The amendment works and fitting were completed on site by a traditional steelwork fabricator.
Success factors
The client was keen to explore low-carbon and reuse options with much of the building’s cladding also reused.
An approximate schedule of materials to be removed was compiled to identify reuse opportunities, though no full pre-redevelopment audit was undertaken.
The case for reuse was established early in the design stages. Open discussions between the architects, client, and engineers were key to achieving success.
Challenges
Following removal, the steels had to be measured, inspected and detailed for reuse. Allowing sufficient time in the programme for these steps was challenging, and clear communication with the contractor was essential.
Re-evaluation of the design at Stage 5 was required to confirm which elements could be reused, and where, based on their sizes.