Walls may be constructed of:

a)    Concrete or clay brick masonry

b)    Timber or steel framed

c)    Glass (glazing in a timber, steel or aluminium frame)

d)    Concrete panel cast on site or precast in a factory

e)    Mud brick (generally in a structure with timber posts)

Framed buildings can be lined with plasterboard, fibre cement sheet, metal or timber boarding.