This Victorian mid terraced house was in need of a revamp, and the owner decided this was the opportunity to upgrade to a highly thermally efficient, comfortable eco-house, showcasing what can be done to this common house type throughout Britain. This solid brick walled house with old and leaky windows (some single glazed) was cold, draughty and generally uncomfortable, with mould growth in some areas. Peter thought if you are going to improve the thermal performance, why not go the full way and upgrade to full Passivhaus.
This obviously has some restrictions – the orientation is fixed with the front facing west which is not ideal, and the windows need to remain similar to retain the street scene. The foundations have not been built with the thermal bridge free details of a new Passivhaus, and cannot easily be changed. However, the house is mid terrace and so the heat losses either side are minimal (assuming these houses are heated to a similar temperature), reducing the heat loss area.
The following strategy has been taken to make the building highly efficient, and incredibly comfortable: