Techniques And Methods Of Damp Prevention The following precautions should be taken to prevent the dampness in buildings, before applying the various techniques and methods described later : (I) The site should be located on a high ground and well drained soil to safeguard against foundation dampness. It should be ensured that the water level is at least 3m. below the surface of ground or lowest point even in the wet season. For better drainage the ground surface surrounding th building should also slope away. (II) All the exposed walls should be of sufficient thickness to safe guard against rain penetration. If walls are of bricks they should be at least 30 cm thickness (III) Bricks of superior quality which are free from defects such as cracks, flaws, lump of lime stones should be used. They should not absorb water more than 1/8 of their own weight when soaked in water for 24 hours. (IV) Good quality cement mortars should be used to produce a definite pattern and perfect bond in building units throughout the construction work. This is essential to prevent the formation cavities and occurrence of differential settlement. (V) Cornices and string courses should be provided. Window sills, coping of plinth and string courses should be slopped on top and throated on the undesirable to throw the rain water away from walls. (VI) All the exposed surfaces should be covered with waterproofing cement plaster (VII) Hollow walls are more reliable than solid walls in preventing dampness and hence the cavity wall construction should be adopted wherever possible. - Study24x7
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soyab khan
11 May 2019 09:47 AM study24x7 study24x7

Techniques And Methods Of Damp Prevention The following precautions should be taken to prevent the dampness in buildings, before applying the various techniques and methods described later : (I) The site should be located on a high ground and well drained soil to safeguard agains...

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