Brick walls have high thermal mass, but without insulation are usually too cold in winter, and often too hot in summer if exposed to prolonged hot conditions. If a wall cavity is insulated, the internal thermal mass (i.e. the internal brick skin) is protected from external temperature changes, and becomes highly effective at regulating temperatures within the building.External walls should be insulated to reduce radiant, conducted and convected heat transfer.
Wall insulation can be installed:
On the inside and outside surface of solid walls
Insulate existing cavities by:
Pumping in loose bulk material to a measured density
Installing bulk insulation sheets/boards
If using a framed construction system, insulation should be placed within the wall framing. Insulation can also be installed outside the framing (but the insulation must be weatherproof to be effective).
Note that the amount of insulation installed may depend on the thickness of the walls and the size of the framing.
If building a new home or renovation, consider increasing the framing size to fit in more insulation. If using a solid construction system such as concrete, insulation should be placed on the inside of the solid wall within the cavity.
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