COMMON CAUSES OF
The most common cause of most foundation problems is too much or too little
moisture in the surrounding soil. High moisture content leads to the soil expanding. Low moisture content leads to the soil contracting. And it is precisely this expansion/ contraction that can cause the concrete floor to break.
So if the problem is too much moisture, where are all these extra moisture coming from?
When there is movement in the soil, it is very common to find broken water and sewer pipes. And with broken pipes, the area surrounding it will be saturated with water. Because these pipes are buried underneath the foundation, the only ways to get to it is by breaking the slab at the location of the plumbing leak or by
tunneling through the side of the house. Either way, it is advisable to hire a licensed plumber. Substandard work will only cause you more headaches later on.
Ever seen water just collect in puddles next to your house? That means you have a drainage problem. The most common source of these paddles is rainwater.
Check to see if the soil around your house is at the proper grade so that any water runoff will flow away from, not into, the house. Although there are differing opinions as to the proper grade of soil, there is general consensus that the slope should be at least 5%. In other words, the grading should extend out from the house approximately 6 inches for the first 10 feet. You might be able to get away with less slope, but to be on the safe side, you should follow this minimum recommendation from experts.
When you have large trees on your property, the roots of these trees can potentially cause you problems. First, these trees need water to grow so they draw moisture from the soil and, as stated before, low moisture content in the soil will cause it to contract. Second, large trees have large roots and if you plant these trees too close to your home, the roots may become large enough to push into the house foundation leading to cracks as well as damage to the interior of the house.