OWNERS of old houses don't have the same opportunity to achieve thermal efficiency as those in modern homes. However, there are ways that you can conserve those much-needed units of energy, from upgrading the insulation and draught-proofing windows, to sheep's-wool insulation and fitting a flue balloon. In each instance, explore the following options with a building surveyor or architect with experience in historic building.
1 Insulate, but be sure to ventilate
Although historic houses have poor thermal fabric by modern standards, insulation upgrades need to be balanced with appropriate ventilation to avoid condensation and damp, which eventually lead to decay. Blocking up draughts can cause a building to 'sweat', so take advice from a building surveyor or architect, if in doubt. It is also worth noting that listed buildings may require consent for thermal improvements.
2 Upgrade the roof insulation
This is a relatively straightforward task above a flat ceiling, as the insulation is simply laid between ceiling joists, leaving a cold roof space above. Insulation materials include sheep's wool, mineral wool and glass wool. Insulation above sloping ceilings that encroach into the roof space may be more complicated, so consult a professional for advice.
3 Draught-proof windows
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