The preservation of historic structures requires an understanding of building materials and its deterioration agents. The preservation treatment will depend on the nature of the building material, the extent and cause of the deterioration.

Factors Causing Deterioration of Building Materials

Deterioration of building materials can be caused by intrinsic and extrinsic factors.

Intrinsic factors are those inherent of the nature of the building material such as a defect in its processing and manufacture, a defect in the cutting, shaping, distribution and all other substandard conditions of the material.

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