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A short guide to radical retrofit

Green Building Store has just launched a film which goes through the key principles of undertaking a radical retrofit of a home. The 10-minute film uses two real-life projects in West Yorkshire to illustrate the key principles for whole-house retrofits, drawing on principles from the Passivhaus low energy building standard.

The film emphasises the importance of paying attention to insulation, airtightness, continuity of insulation and ventilation when undertaking a radical retrofit. It also explores what to consider when choosing internal wall insulation (IWI) strategies for radical retrofit projects.

The film contains an interview with a homeowner who commented on the effects of the retrofit on the comfort and energy efficiency of the house:  

“In the winter we used to start to hate the house because it was so cold and draughty and miserable. Since the retrofit, the place is far warmer than it ever was. It stays at a constant temperature of all year round, day and night. Obviously now there are no draughts. The air is always fresh and clean in here because of the MVHR system that pumps around air and filters it and heats the incoming air.’s a very different place indeed.”

Green Building Store Director Chris Herring commented:

“They need to improve the energy efficiency and comfort of Britain’s existing housing stock is getting ever more urgent, to combat fuel poverty and tackle the threat of climate breakdown. Improving the energy efficiency of our existing housing stock is a lot more difficult than a newbuild. However, the film shows that it really is possible. Using the Passivhaus standard and methodology we can bring our housing stock up to 21st century standards.”

The film complements other free resources on radical retrofit on Green Building Store’s website, including:

Heath House Mill,
Heath House Lane,
HD7 4JW,

01484 461705

Proud to exhibit at the Homebuilding & Renovating shows

Green Building Store is committed to low energy building to help reduce carbon emissions and cut heating bills. The most effective way of doing this is to focus on the building fabric, using high levels of continuous insulation, together with stringent airtightness and advanced ventilation strategies. This approach leads us to be strong proponents of the Passivhaus approach to low energy building, which can cut a building’s heating need by 90% compared with the UK average.