We’ve found that putting in a layer of insulation underneath the concrete actually helps to prevent frost heaving from penetrating into the underlying soil and thus prevents the soil from freezing and expanding to the point where it pushes your concrete around.
How to Prevent Frost Heave in Concrete Slabs?
Frost heave is a common problem in areas where the temperature drops to freezing. It occurs when water in the soil freezes and expands, pushing up the concrete slab and causing it to crack or heave.
Preventing frost heave in concrete slabs is essential to the longevity of the structure. Here are some tips on how to prevent frost heave in concrete slabs.
First, use a good quality concrete mix that has a low water content. This helps reduce the amount of water in the concrete and reduces the chances of frost heave.
The concrete should also be cured properly to ensure that it is strong and durable. Second, use a vapor barrier underneath the concrete slab.
A vapor barrier helps keep moisture from seeping into the soil, which can cause the soil to freeze and expand. Third, use an insulation material such as foam board, rigid insulation, or a combination of the two.
These materials help to keep the ground around the concrete slab warmer, preventing freezing temperatures from reaching the soil. Fourth, make sure to keep the concrete slab level.
This helps to prevent any uneven freezing that could cause the slab to heave. Fifth, use a de–icing material such as rock salt or calcium chloride