The reasons of dampness in the building are following.

• Bitumen /Tar- felt coat on RCC slab is not proper or is done leaving some area and joints.
• Cement concrete ‘gola’ with junction of wall and slab is not constructed or defective or broken. 
• Rain water pipe joints are defective and there is leakage even on smaller blockage.
• Rain water pipe mouth have crack in it.
• Sometimes rainy water pipe inlet is higher than ‘Khurra level’.
• Some time there is a gap between the mouth of rainy water pipe and roofing.
• The tracing at roof does not have required slope.
• Earth place on RCC slab for making slope is not properly rammed. 
• Some depression exists on the surface of tile tracing where the water is stagnated.
• Broken tiles are used.
• The joints of “Chhaja /Cantilever” are not properly finished with the walls.
• Drip course not made or broken.
• Proper sill of windows and ventilator is not constructed.
• The masonry joints of the walls are week and are not covered with cement plaster or cement pointing.
• Proper ‘Damp Proof Course’ at the floor level is not made on the walls.
• Rainy water discharge is not through proper shoe in the pipe.
• Plinth protection is not made around the building.
• The joints of Water supply and sewer line have some leakage.
• Under water tank at roof, no water proofing is done.
• Gap between the tile tracing and support of water tank is left.
• Joints of tile tracing are not filled properly with mortar.
• Cement pointing is defective at the top of tile tracing.
• There is leakage from the water tank.
• Proper ball cock is not fitted in the water tank.
• Over flow pipe is not fitted in the water tank.