The refurbishment and extension of a terraced property in central London. We combined a wide experience of modifying and upgrading existing buildings in the capital with knowledge of the benefits and pitfalls of prefabricated construction.
The project includes general internal alterations and a new three storey rear extension above ground floor. This allowed each floor to accommodate two single bedroom or studio flats and a balcony to each of the rear units.
For the new extension, we carried out the detailed design of a steel beam grillage at low level and prepared the scheme design and preliminary sizing for the timber superstructure. We worked closely with Global Timber Frame, who completed the design of the timber panels and fabricated and erected them. Panels were made up using a combination of glulam beams and columns and TJI composite solid timber and particle board joists. Both of these elements make economic and efficient use of the basic timber material whilst allowing traditional craftsmanship skills to be deployed to achieve a quality product.
Panels were fabricated on a large work table in the correct relationship to each other to ensure accurate fit on site. They were designed to allow economic and convenient transport on normal flat bed lorries. Each panel was wrapped for protection in transit and transported to site in the correct order for immediate incorporation into the finished building. The pieces were craned over the main building and assembled as they were lowered into position. With the exception of a few members deliberately delivered overlength and trimmed to ensure the correct bearing on the existing structure, on-site timber waste was eliminated.

Principal: Tony Hayes

Off-Site Construction Award, Best Use of Timber.