How cavity walls insulation functions

A cavity wall consists of two parallel walls with a gap or a cavity between them. This cavity is usually filled with insulation material. The cavity walls have the following functions:

The cavity walls are constructed for the following purposes:

It reduces the chance of entry of moisture from the outer wall to the inner wall and thus helps in keeping inside of the building free from dampness.
The air or insulated material filled in the cavity wall acts as a non-conductor of heat and hence minimizes the transmission of heat from the outer wall to the internal wall. Thus, cavity walls help in maintaining the thermal insulation of a house.
The air in the cavity wall also absorbs sound.
As there is no dampness the efflorescence of the walls is also prevented.


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