One of the issues
we commonly see in residential properties is cracking.
Cracking is caused
by the expansion, or swelling, and contraction of the reactive clay soils upon
which they are founded. Expansion and contraction occurs with moisture changes
within the soil. The extent of movement and cracking is quite often exacerbated
when there are trees and shrubs in the vicinity of the property which draw
moisture from the soils leading to shrinkage.
There are a number
of ways to tackle the issue of movement and cracking, including maintaining the
moisture in the founding soils that support the footings. It is also important
that the paving is constructed at the perimeter of the residence as this
restricts moisture evaporation and shrinkage of the soils that may result in settlement.
It is also
necessary to ensure gutters and downpipes are clear of debris and leaves and
that the stormwater system discharges away from the building. Long-term leakage
can result in expansion of the soil and a portion of the house to rise
resulting in cracking to the structural fabric. A leaking stormwater system
attracts roots from nearby trees and shrubs which, during dry periods (such as
summer), can again exacerbate soil drying and settlement.
"Surprisingly, irregular
watering of lawns can also contribute to cracking – a reminder to keep on top
of all your gardening!"
Therefore to
minimise cracking in residential properties, you can look to some of the
following solutions:
1.
Ensure
paving is constructed at the perimeter of the residence and has a fall away
from the residence.
2.
Regularly
water vegetated areas and undertake maintenance of trees, shrubs and
lawns. If possible avoid vegetation or
trees in close proximity to the structure.
3.
Keep
gutters and stormwater system clear. Ensure
all downpipes discharge away from the residence.
4.
Ensure
falls of surfaces adjacent to your residence are sufficient to convey water
away from residence and to avoid ponding of stormwater.
5.
Ensure
no objects are placed against external walls which may effectively bridge the
damp proof system of your residence and lead to damp issues inside your home.
