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It’s best to avoid rain on freshly poured concrete for 48 to 72 hours for the best results, but you’ll see minimal losses of strength as long as your concrete remains dry for five hours after pouring. You can either wait for dry conditions to pour your concrete or cover the area with a tarp to help keep it dry.

Yes, you can put too much rebar in concrete. Too much reinforcement can cause strain in the concrete, leading to cracking. Air pockets can also form in the gaps between rebar when concrete fails to fill the space properly. The placement and installation of rebar is a specialized skill, so consult an experienced pro before proceeding.

Yes, spraying water on the surface helps concrete cure evenly by preventing the top layer from curing long before the wet bottom layer cures. Otherwise, the top layer will cure and shrink, creating tension, and this tension will tear the top and bottom layers apart, creating a weakened slab. Water prevents this from occurring.

A floating slab is a single chunk of concrete that sits directly on flat soil, while a monolithic slab is a single piece of concrete that includes built-in footings that reach several feet below where the majority of the slab sits. Monolithic slabs provide more support, so they’re suitable for home construction, whereas floating slabs get minimal support from the soil directly below and are more common under sheds and detached garages.