Cavity Wall

The usual construction for external walls that comprises an inner and outer skin of either brick or some form of block with a space of around 2 inches between for insulation.

In modern timber framed dwellings, timber framing forms an inner 'skin' then is often clad with an outer skin of brick or similar to give a traditional appearance.

Properly constructed cavity walls are more resistant to damp penetration than solid walls and thermal insulation is also higher.