Most of the people gets confused about building
repair services, and they really don't know what's the right time to
go for building repair services (Building structural repair &
Painting Services), so here are few symptoms that shows when to take
up the building repair services (building structural repair &
Painting Services) for your Sky-crappers, Housing Societies,
Below we have listed several points that will
really help you all to identify the right time to conduct building
repair & paint work services.
1. Why do buildings show cracks after a few years?
Building show cracks because of two main reasons and hence there are
two types of Cracks:
* Multi storied buildings are more of dynamic structures rather than
static. They go through the normal phenomenon of settlement,
deflections, vibrations and movement because of the movements of
loads and wind. With time this dynamism causes some stresses, which
show up in the form of cracks in the walls ceiling etc. This type of
cracks are only plaster deep. These cracks are treated by, chasing
them out into ‘V’ shaped groves and filling them up with good
quality crack filler.
* In the reinforced concrete, water/moisture reaches the steel by
leakage or because of the porosity of concrete. This water in the
presence of carbon dioxide oxidizes the steel and causes rusting or
corrosion. The volume of corroded steel puts lot of pressure on the
neighboring concrete and the concrete develops cracks. The cracks
due to corrosion appear on the columns and beams. These cracks are
larger and generally associated with brown colored stains.
2. Are cracks dangerous and how to treat them?
Surface cracks in the plaster, and those, at the junction of the
soffit of the beam and the top of brick work in a wall or those, at
the junction of column and the brick work, are only plaster cracks
and can be treated by the use of crack fillers
Cracks due to corrosion which are seen on the column and beams, need
to be inspected by taking out the concrete to expose the
reinforcement. If the reinforcing steel is corroded more than 50 %
of its original volume, then it will have to be treated by replacing
the lost steel and corrosion inhibition treatment done to entire
steel. Then re-concreting is done, by jacketing method, using Super
Fluid Micro Concretes, after removing the old concrete. If the
damage to steel is less than 50 % of its original volume then the
lost steel is substituted with new steel to make up the lost volume
of steel, corrosion inhibition treatment is done and the broken
concrete is made good by polymer modified mortar.
3. How to identify that the building has a structural problem?
Cracks in the columns and beams, cracks associated brown stains and
large chunks of concrete falling off from the RCC members and cracks
being very big are all signs of corrosion to indicate that the
building has structural problems. Physical examination of the steel
by a competent structural repair Consultant, after removal of the
cover concrete establishes the degree of the problem.
4. How do we know whether reinforcement is corroded?
Brown marks associated with the cracks indicate corrosion. Bigger
cracks on the beams and columns also indicate corrosion. A physical
inspection after removing the cover concrete will show the corrosion
if it is there. Corroded reinforcements can be separated, by picking
from the fingers, as they are very weak.
5. What causes corrosion of reinforcement?
Corrosion is caused by the oxidation of steel. Reinforcing steel
when comes in contact with atmospheric carbon dioxide in the
presence of moisture the corrosion process starts and spreads fast
like a cancer. Ground water containing chlorides sulphates etc,
rising in the capillaries of the concrete when comes in contact with
the reinforcing steel the reaction between the two oxidizes the
steel and the corrosion process starts.
6. Do leakages cause corrosion?
Yes leakages are the main cause of corrosion of steel. Hence a good
waterproofing treatment always ensures a protective atmosphere
around the steel for a long time and contributes to the longevity of
7. Is it safe to stay in buildings that have corrosion problems?
Since the process of corrosion progresses very fast and could cause
the collapse of the structure it is advisable that the repairs are
carried out faster. If the sound steel is reduced to less half its
original volume, then it is not safe to stay in such buildings. It
could be a great risk to life and valuables stored in such
8. When to take up repairs?
Repairs need to be taken up immediately after the first signs of the
corrosion to steel are detected so that the minimum damage can be
repaired economically. Any season is suitable for repairs except the
During the rainy season difficulty will be faced by the workers on
the scaffoldings to reach the area of repair and hence inefficiency.
Rains cause delays and non continuity of works with the possibility
of the repairs being washed away or becoming weak with the
contamination of rain water. During summer holidays many tenants
have a tendency to go out on holidays giving fair accessibility to
the workers and less botheration to the tenants.