cellular bricks

THose in which the holes are closed at one end and exceed 20 percent of the volume of the brick.

Types of brick

1. Cellular and perforated bricks are lighter n weight than solid bricks and the cells and perforations facilitate drying and burning.
2. The saving in clay and consequent reduction in weight is an advantage in non-;loadbearing walls but does not significantly improve thermal insulation in external walls
3. Cellular bricks are laid with the cells or hollows downwards and perforated bricks should be laid so that the mortar does not fill the perforations

Other classifications

Brick may also be classified by one or more of the following:

1. Place of origin
2. Raw material
3. Manufacture , for example clay
4. Use , for example foundation
5. Colour , for example , red
6. Surface texture , for example sand-faced