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English Heritage approves Grade 1 Listed Repairs at Roehampton House

Client: St James
Location: Roehampton, London
Approved Installer: Quadriga Contracts
Reference No: CS091

Built in 1712, Roehampton House is a Grade 1 listed Palladian mansion set within two acres of landscaped gardens in south west London. A private residence until the First World War, it then became a hospital through until the late 1980's. It has now undergone a multi-award winning restoration and conversion into luxury apartments and houses. Part of this restoration was the need to fully stabilise the Archer Building, the original main building, which had suffered from general movement over the years, accelerated by additional constructions and various structural alterations. This had led to widespread cracking affecting about half of the internal walls. In addition, various window heads and archways needed reinforcing while some unstable rusticated quoins required securing.

The Helifix Solution

All works were overseen by English Heritage, who had approved the concealed non-disruptive Helifix repairs and their sympathetic installation techniques.

  • To stitch the numerous cracks, many of which ran the full height of the internal walls on all floors, HeliBars were bonded into channelled-out mortar beds with HeliBond cementitious grout.
  • Fully grouted CemTies were installed vertically up through the window heads and archways to reinforce and stabilise the weakened masonry.
  • Further CemTies were used to secure the unstable quoins at the building's corners and to securely tie the internal and external walls.

Following repointing and replastering there was no visible sign of the non-disruptive Helifix repairs which sympathetically and cost-effectively restored structural integrity to this historically significant building. To download the case study in PDF format please click here