• Standard wastage of construction materials depends many variables as:

Nature of work

types of materials

method of application

• In addition of uncontrollable wastage, there is category of controllable wastage.

Wastage on account of designers specifying non standard materials having unattainable specifications.

Wastage due to incorrect purchasing resulting in over buying, wrong buying, unnecessary buying and untimely buying.

Wastage in transportation and handling including breaking and pilferage.

Wastage during storage from deterioration, improper storage, breakage, obsolescence and theft.