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Concrete can cure in 24 hours if the temperature remains above 40 degrees, but it might take up to 48 hours for the initial curing if the temperature drops close to freezing. You can speed up the curing process in cold weather by using accelerants, or you can insulate the slab or enclose and warm the area with heaters.

In most cases, you’ll want your patio to be 4 inches thick, although you should add reinforcement and increase the thickness up to around 8 inches if you want it to support heavier loads and resist cracking more readily. Although thicker slabs will cost more, you’ll start seeing diminishing returns at around 6 inches.

Most of the time, you or your contractor will spray the concrete form and framework with a release agent or oil to prevent sticking. This is common practice with wood and steel forms. For insulated concrete forms, the styrofoam formwork often remains in place after construction, so you don’t need to treat it beforehand. Foam concrete forms made out of melamine also may not need treatment beforehand, as the material naturally won’t stick to the concrete after it’s cured.

Yes, you should seal your exposed aggregate concrete to keep it protected from the elements and reduce the risk of cracking and concrete spalling. You’ll need to invest in the cost of resealing your concrete about every three years to keep it in good condition. Unsealed exposed aggregate concrete is susceptible to water damage, stains, chips, cracks, and abrasion. Sealers are available in various finishes and levels of gloss. Outdoor exposed aggregate concrete should be sealed with a non-yellowing, UV-resistant sealer to preserve the look of the finish.