While concrete slabs have their advantages and disadvantages, they remain trendy among developers. The slab foundation is also known as “slab on grade” foundations. Composed of concrete, they became fashionable in the 1950s. Until now, concrete slabs are still being used.
One issue that lingers among property owners is if slabs need footings. But first, what is a slab foundation? Let’s find out.
What is a concrete slab foundation?
A concrete slab foundation is a massive, thick slab of concrete that usually is 4 inches to 6 inches deep. It is poured straight to the ground. The sides of the slab are deeper to give it strength around the edges. The sides of the slab are deeper to provide it with strength around the edges.
A concrete slab does not have a crawl space below it. This type of foundation is different from house foundations with basements as there is no space under the floor.
What are concrete footings?
Footings are an essential part of a foundation plan. They are normally made of concrete with rebar support. The purpose of footings is to bolster the foundation and avoid settling. Footings are notably effective in areas with problematic soils.
Footings should be done by professionals who can evaluate the soil conditions and determine the appropriate depth and width for the footing. The sizes of footings likewise depend on the type of structure that will be constructed. At the same time, their placement is crucial in maintaining the support for the foundation and, ultimately, the structure.
Preparing concrete footings
Preparation is just as important as pouring a concrete slab.
- Dig down to the correct depth.
- Flatten out the ground using the flat side of a rake for a level surface.
- Tamp down the soil with a mechanical or a hand tamper.
- Pour 2 inches of small, spherical gravel for extra drainage needs.
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