damp proofing, damp rising and importance of damp proofing

Damp proofing:

                       Damp rising could be stopped by damp proofing. because it may leads to severe damage to the structure. First, paint finishing got bump and shedding .next, cement plastering got corrosion and finally brick masonry got severely damaged.so we should apply all damp proofing methods in early stage of  construction.

Example:

Effect of Damp Rising

Effect of Damp Rising

Effect of Damp Rising

Effect of Damp Rising

Reasons:

• Bricks used may be a salt content one.
• not giving proper damp proofing chemicals
• Salt may be present in water and sand.
• Construction site may be nearer to water catching area like bond, lake etc.
• Finally,  Damp rising.

How to avoid it:

First four reasons can be avoided by selecting good quality of raw materials, by applying damp proofing chemicals and selecting the proper construction site that could not water catching area. Final reason the “DAMP RISING” could be avoided during the execution of work by some construction techniques like DPC, BASEMENT PLASTERING etc.

In this article, we will discuss about that how to avoid DAMP RISING in earlier stages of construction period.

Example of Basement, That have not properly constructed against Damp Rising :

Inner and External Wall not Cement Plastered

Brick courses started at Ground level

Plinth beam and DPC not provided

If you watch the above 3 images, you can notice some points.

• Inner and outer brick wall are not covered by cement plastering. So that ,in raining days, sand filling in basement gets wet and exposed brick wall gets damp. Damp raised automatically by capillary action.
• Brick masonry courses started at ground level. Earth beam top at within the natural ground level. I mean that bottom course touches the natural ground. So that, brick wall gets wet. Damp raised by capillary action.
• Plinth level belt not provided, so damp rising within the basement may extend up to superstructure.
• Damp proof courses like cement plastering, bituminous etc not provided at the top of basement wall.

How to Prevent the Damp rising?

Please, go through the following pictures and study. You can observe the ways.

Example of Basement that properly constructed against Damp Rising :

View of Basement built against Damp Rising 

Earth beam prevent Damp Rising

Earth beam prevent Damp Rising

Earth beam top at above nature ground level so that
 1st brick courses at above ground level and plinth beam provided
to stop the Damp rising  continues to superstructure

view of all arrangement against Damp Rising at Earth beam Top,
Plinth Beam, Damp Proof Course at Basement level, Inner and External
wall cement plastering

You can notice some important points:

• Earth beam top must be above the natural ground level .so, Automatically Brick courses started above natural ground level. Even though the surrounding area got wet, Damp raising arrested at bottom of the brick wall.
• Plinth belt must be provided in order to stop the damp raising above basement. Damp raising by capillary action within the basement could not continued.
• Cement plastering Could be a must one within the basement for both internal and external .Even though, surrounding area gets wet, proper cement plastering will arrest the damp will not permit the damp to go inside.
• Damp proof course must be provided at top of basement wall in order to stop the damp raising. Damp raising by capillary action within the basement could not continued to superstructure.

Conclusion:

There are huge amount of small holes within the bricks. So that Brick wall is affected. If you safe the Brick wall by above explained method You can automatically arrest the Damp Raising.

 Related links: all about brick masonry, All about window placing, Parapet wall tips, Cover block