Southampton City Council commissioned a report from us to determine if Weigh House, which is currently a ruin, might be repaired and utilised by St John’s School to provide an additional classroom. The ruin of Weigh House is Listed grade II* and is a scheduled monument. The site lies within the Old Town South, Conservation Area.
The design scheme proposed building a structural steel frame inside the old walls to support a new first floor and brace the structure. A new insulated timber lining would have disguised the steel frame, leaving the outer wall cold. The intention was to leave the external wall moderately damp to prevent the mobilisation of salts, which would have caused erosion of the masonry.