Cavity walling and brick cladding
The standard form of construction for the external walls of brick buildings is called cavity walling. This means that the bricklayer builds the two separate ‘leaves’ or ‘skins’ of ‘brick masonry’ (a general term indicating brickwork and/or blockwork) with a 50 mm to 75 mm wide space between. The outer skin is usually 102.5 mm thick face brickwork, but may be constructed from facing quality blocks. The inner skin is usually 100 mm thick common blocks that are later plastered to receive internal decoration (see Fig. 10.1).