What causes foundation problems?
There are several reasons why foundation repairs are necessary for maintaining the stability of your home. Here are some of the reasons why we’re house underpinning Brisbane:

Faults in the original foundation
Due to poor ground preparation as the house was being built, which is one of the construction defects.

Reactive soils
Soils may experience subsidence (which is a shrinkage that occurs due to a decrease in moisture content) or heaving (which is the swelling of the soil due to an increase in moisture content).

Nearby excavations
May destabilize the soil supporting the foundation.

Natural disasters
Such as an earthquake or floods which may weaken or moved the existing foundation.

Adding weight to the existing building
By constructing a second story to the property, increasing the weight bearing on the existing footings.

Water leaks in the foundation
Which soak and wash away the surrounding soils resulting in a shift or drop in the foundation.

Poorly compacted soils
It usually occurs when a house is built on poorly compacted backfills. As the soil absorbs water, it pushes against the foundation which weakens it.

Slope failure
which is the movement of the earth downhill. It may be slow movement over the years, known as creep, which can be corrected using underpinning methods. However, the methods tend to be site specific, requiring assessment by an expert.
It is very important to understand the reason for underpinning the property before determining the ideal method for underpinning a house. Mistaking the causes could worsen the problem, complicating the foundation repair efforts. This may lead to an increase in the cost of underpinning a house. For this reason, when slab jacking Brisbane homes that have suffered house subsidence, we start with an inspection by a qualified engineer and order a geotechnical report.