When you see a crack in external wall, any home owner usually tends to think that the material used for constructing the building was of poor quality. This need not necessarily be the reason for crack development in external walls. In our previous article we have seen that crack in external wall due to accumulation of rain water on parapet (chajja) wall.
Low percentage Cracks in external wall is often a complaint with Mumbai residents of high rise buildings. For high rise buildings concrete bricks and blocks / cellular bricks used contain less cement content. Low cement content is another reason for crack development in external walls.
Cement usually shrinks on drying. To avoid shrinkage, a non-shrink acrylic polymer is mixed with cement before application. The non-shrink polymer is available in powder form. Application in this cement can protect the wall form crack development and leakage problems too.
The cracks on external wall-small and big are treated differently. Small cracks can easily be sealed by external surface treatment. Whereas big cracks that would be deep need to be treated with non-shrinking polymer in powder form is used.
Hi .. I have house in Mumbai due to rain so leakage problem in upper wall . So kindly provide any solution and contact person
I am constructing a house in Mysore and planning to have terrace garden of 10*12′. What kind of water proofing is required kindly suggest the method and share the contact no. If you know some one in Mysore.
My house in Mysore is about 20 yrs old. For the last 4-5 yrs, the Sealing in some part of the house is showing blistering effect and the coating is detaching.
I tried to overcome this problems as follows;
1. The cracks in the terrace and on out side the wall were filled with a particular pasty resin,
2. The entire terrace was coated with suitable paint including Dr. Fixit.
But none of these have given the satisfactory results and the blistering is continued.
I have been advised;
1. Redo the Terrace with fresh concrete,
2. Fix tiles,
3. cover the entire terrace with acrylic sheets.
Pl advice how to prevent the leackage.
all above repair work suggested are important and should be done. If avoided now, later it would cost you more to fix problems.