It’s unsightly, it’s dangerous, it’s a potential liability but it’s easy to fix.
Concrete settlement is a very common problem affecting not only residential neighborhoods but municipalities commercial enterprises and industrial facilities. What causes concrete to settle?
Failure to prepare the site. If soil was disturbed during construction was it re-compacted? Was there a 4-6″ layer of compacted gravel placed under the slab? These two primary issues are the cause of much of the settling commonly found in new construction.
The next most common cause of concrete settlement is excess water. Dealing with water runoff is generally not on a builders mind at the start of construction, it should be. Trying to figure out where you were going to put downspouts, sprinklers and water features after sidewalks porches and driveways have been poured is poor planning and asking for concrete settlement. Having a place for your run off to drain such as french drains well away from structures or into municipal water supplies if allowed in your jurisdiction will help your concrete remain stable.
In addition to the above, the type of soil that is predominate in your area plays a role in its ability to support structures. Whether it be sand, clay or silt each has advantages and disadvantages depending on its use. Some soils don’t drain well others are prone to wash out, still others will actually expand as much as 10% with water!
If someone failed in the planning phase and you are dealing with concrete settlement give the concrete raising of leveling professionals a call today.
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February 13, 2019 at 2:57 am
Thanks for sharing this info. For someone who doesn’t know much about settled concrete, this gives a simple explanation as to what factors cause/affect it.