The Construction activities involve use of materials supplied from many sources. They can be produced on site or supplied from different source. Improper management of construction materials results to wastages in the construction site especially in developing countries like Nigeria where the automated and mechanical means of handling and management of construction materials is too expensive or not available. To identify how effectively the construction materials be handled, this paper was aimed at identifying the major source of material supply and the storage and examine the major sources of material wastages in building construction sites. A total of 100 questionnaires were administered randomly to construction managers in building construction sites in Bauchi and Gombe States. The data collected was critically analyzed using descriptive statistics tools. The findings shows that materials supply to construction sites was majority through suppliers and sub-contractors and that wastage in construction sites was attributed to double handling, environmental factor and poor storage. This implies that an adequate waste management mechanism is required in minimizing construction waste.