How To Put A Concrete Floor In An Existing Garage

Install either 2 by 2 2 by 4 or 2 by 6 joists over the garage floor depending on how much room you have floor to ceiling.

How to put a concrete floor in an existing garage.

You can use a dense foam insulation around the edge of the slab and use that to guide your screeding. 6 empty a 40 pound bag of concrete resurfacer into a 5 gallon bucket to make. Place them 16 inches apart. Make sure you have enough concrete to fill the entire area to the depth you desire.

Some are designed to be left in place as expansion joints. Fill in the area with gravel 3 4 and compact it. Install wire mesh or fiber mesh as reinforcement. Put in place a vapor barrier.

Lay the joists on edge across the width of the floor. Laying a concrete floor in an existing building takes some special skills and tools. You can set screed guides rails that you first use to get it flat then pull and fill in the void they leave. Measure the slope if any of the floor from the garage front to the door.

Pour concrete for the new floor. Have the bars prepared before pouring. Place duct tape over existing expansion joints. These bars will provide strength to the concrete.

Add all of the concrete right away so none of the mixture has a chance to dry out. Place the steel rods or rebar around the edges of the freshly poured concrete mix and through the middle of your floor if working with a large area. Pour concrete onto the existing slab until it is around where you want the final level to be. Divide the garage into sections no larger than 144 square feet each.

This is especially important in a wet climate. Allowing the concrete to dry too much between pours will create layers and make the concrete weaker. You do not need to wait for the scratch coat layer to dry completely. The taller the joists the more room for insulation and warmth of the floor.