Construction materials require careful storage on construction sites to prevent damage and theft. Materials can be categorized as factory goods, raw materials, or workshop finished items. Factory goods like cement, ceramics, and ironmongery require protection from moisture, breaking, or pilfering. Raw materials such as stone, ballast and sand are bulky and need dedicated storage space. Workshop finished items and semi-finished items need protection as replacements are expensive. Proper storage is important for material flow, and records must be kept of all materials.