Sailisbury Grade 1 Listed Thermal Building Survey
English Gothic buildings of this design and using stone construction materials, suffer from significant internal pressure changes that create agressive air movement or draft. External stone staircases and tower blocks where built without cavities, single thin glazing in metal frames and overtime will create cracks and perferations in the building envelope, allowing convected air movement throughout. Planning consent restricts the options to retrofit insualtion, double glazing and heating systems so the net effect is these areas remain at a temperature consistent with the outside ambient temperature and are effectively creating cold thermal air bridges and reverse chimneys.
