Buildings transfer thermal energy through their fabric, partly though heat escaping from a warm location to a cooler one, and partly due to the need for adequate ventilation.

Conversely in warmer weather and summer solar gain, a well-insulated building will reduce the possibility of the building overheating and reduce the need for artificial cooling, saving considerable additional energy.

Improving insulation levels reduces heating, as well as cooling costs and environmental impact and, if incorporated into a new design, can deliver additional capital savings in smaller boiler requirements, fewer radiators, air conditioning units etc. This topic covers some of the core principles of optimising the energy performance of the building fabric.

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