Building maintenance technology essentially deals with the study of the occurrence of building defects and the remedies that such defects would require.
A building must meet various requirements and withstand the rigours of climate, and at the same time it isexpected to last for many years, preferable with minimal maintenance.
A wall is a vertical structure forming an inside or an outside surface of a building, usually built of stone, wood, plaster or brick, which acts as a boundary or keeps something in or out.