st luke’s

client: Sanctuary Housing
completed: 2011

The refurbishment works to 23 St Luke Street for Sanctuary Housing, completed March 2011, are to a very high energy standard, part of the ‘Retrofit for the Future’ programme, funded by the Technology Strategy Board to show how we can retrofit existing houses to achieve over 80% reductions in CO2 emissions.

Existing House
A small single Victorian terrace house in Hanley, Stoke on Trent, it receives very little passive solar radiation, and was a cold and hard-to-heat house. ATA undertook a detailed energy analysis and tailored insulation, airtightness and thermal bridge details to dramatically reduce the heat demand.

‘Passivhaus’ Principles Retrofit
Using Passivhaus design principles and components, concentrating on a ‘Fabric First’ approach with high levels of insulation and air-tightness, the retrofitted house has been designed to consume over 80% less energy than the existing house, Passivhaus Planning Package (PHPP) was used to model the existing and potential heating needs and energy use of the house.

A Natural Approach
This retrofit uses insulation materials from renewable sources, including sheepswool and woodfibre insulation. These materials are used for their hygroscopic qualities to help deal with moisture within the existing building fabric, and also to reduce embodied energy used.

Post occupancy monitoring is ongoing.