Internal Wall Insulation

The most effective way to reduce heat loss in homes with solid walls is to insulate the outside of the walls. However, this may not be appropriate for your home, in which case internal wall insulation (IWI) may be a good alternative.

*Figures are taken from Energy Saving Trust and are based on fuel prices as of October 2023. Estimates are based on insulating a three bed, semi-detached, gas-heated home.