Construction

Protect your home from Dampness

Dampness causes most of the damage to the contents of the building. It often leads to the growth of molds and bacteria and creates an unhealthy environment for those who occupy it. Dampness gradually impairs the affected part of the building so this problem should be attended as soon as possible.

Precautions you can take during a new construction:

  • Build proper drainage system.
  • Implement proper slope in the floors of the kitchen, the bathroom, the roof and on the “Chhajja” for the proper flow of water.
  • Fit the water supply pipes tightly.
  • Fit the joints of the rainy water pipes tightly and properly to avoid the leakages in the joints.

fit the joints properlt to avoid dampness

Wall Dampness

  • Make sure that rainy water does not penetrate through the joints of the structure. As you see in the diagram below, water is penetrating into the walls due to an untreated joint. If the joint was treated during the construction, the water would have flown without being penetrated into the building.

Dampness in joints

  • Plaster the top surface of “Chhaja” and maintain proper drip course to avoid the leakage.
  • Finish the joints of the parapet with the tile tracing or with rainy water pipes and any expansion joints smoothly. If the joints are not finished, the water may be stagnant at the corner and could eventually penetrate into the building.  As you see in the image below, the cement concrete gola in the corner ensures smooth flow of the water to avoid dampness in the long run.

Repair joints to avoid dampness

Protective methods for an existing building

Dampness problem is often noticed in the building. You can use the methods below to eradicate the dampness problem in an existing building.
  • Re-plaster the affected area with a waterproof plaster or cement mixture. 
  • Install a proper Damp Proof Course (DPC), a continuous layer of damp proofing material, by removing a line of bricks close to floor level followed by insertion of plastic sheet along the same line of bricks by replacing the old mortar with waterproof mortar. 
  • Cover all the outer walls with vertical DPC from ground to the floor level.
  • Apply the most widely used “Pressure Injection of a higher Alkyl Siloxane solution” into the holes of the bricks.
  • Place the “Delivery Tubes” of specific designs into the holes of the bricks and transfuse the liquid into the wall under the influence of gravity.

Apply DPC for damp proofing

  • Lay the water proofing membrane, on the top of  the surface of existing floor, which acts as a barrier against dampness.
  • Let all the sanitary and the water supply fittings be tight and leak proof.
 
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Dampness in building or house may cause most of the damage to the components of the building or house. Dampness often leads to the growth of molds, mites and bacteria that creates an unhealthy environment and causes health problems. Damp proofing with the help of chemicals may protect your house.
Brick and masonry absorb water so they must be sealed off, away from moisture and moisture-bearing substances like soil. If it does not occur, the water will rise in the walls causing dampness.
Cement plaster 1:3 with two coats of hot bitumene when laid @ 1.7 kg per sqr meter or cement plaster 1:3 with bitumen
The foundation of all structures are embedded into the soil. Bricks being porous or brick masonry below ground level can absorb moisture from adjacent ground.
For residential buildings DPC consists of a layer of - 40 mm thick cement concrete 1:2:4 (1 cement: 2 Coarse sand: 4 graded stone aggregate 12.5 mm nominal size ).
For residential buildings DPC consists of a layer of-
The following table expresses the type of coating recommended for the protection of Dampness:
The density of masonry bricks used must be greater than 1200 kg/m³.
REPLASTERING: The most common method is to scale the affected damp plaster back to the brickwork and replaster the affected area with a waterproof plaster or cement mixture.
The water proofing membrane is laid out on top of the existing floor surface. It will act as a barrier against dampness.
.Dampness in buildings is a concern because it often leads to the growth of molds and bacteria
The following brands of chemical are used for the protection of dampness from building:
A damp building is unhealthy to those who occupy it, dampness in building is a concern because it often leads to the growth of molds and bacteria.
The following method should be adopted for the protection of dampness in floor:
Horizontal DPC :- All the brick walls should be covered with the horizontal DPC at the floor level.
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