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A 4-inch-thick concrete slab can support around 4,000 pounds per square foot if a contractor reinforces the slab with rebar, while that same slab without reinforcements will support closer to 1,000 pounds. For the purposes of a patio, 4 inches in thickness without reinforcement should suffice unless you’re installing heavy kitchen equipment or a hot tub on it. In those cases, reinforcing your slab and sticking with 4 inches of thickness should provide plenty of strength.

Per the International Code Council, walk-in shower floors should have a minimum slope of 1/4-inch per foot (or a 2% slope) towards the drain. The slope should be no steeper than 1/2-inch per foot (or a 4% slope). This helps safely direct water into the drain rather than all over your bathroom.

Concrete lasts much longer than cement, as it can withstand heavy loads and harsh weather conditions. Concrete can last for over 100 years under most conditions. Cement cracks and crumbles when used independently, but it is an important ingredient of building materials such as concrete and mortar. You use cement and other ingredients to make concrete.

You should sand concrete before painting, as it helps remove any irregularities and pieces that stick out from the surface. This not only helps the paint look better but it prevents any unwanted water absorption.