How To Put A Concrete Floor In An Existing Garage

Pour concrete for the new floor.

How to put a concrete floor in an existing garage.

Fill in the area with gravel 3 4 and compact it. You can set screed guides rails that you first use to get it flat then pull and fill in the void they leave. Have the bars prepared before pouring. You can use a dense foam insulation around the edge of the slab and use that to guide your screeding.

Place duct tape over existing expansion joints. Laying a concrete floor in an existing building takes some special skills and tools. Lay the joists on edge across the width of the floor. This is especially important in a wet climate.

You do not need to wait for the scratch coat layer to dry completely. Nail cross blocking boards to hold the joists together every 4 feet. These bars will provide strength to the concrete. Pour concrete onto the existing slab until it is around where you want the final level to be.

Measure the slope if any of the floor from the garage front to the door. Lay an impermeable membrane on the raw concrete as a vapour barrier. 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. Make sure you have enough concrete to fill the entire area to the depth you desire.

Add all of the concrete right away so none of the mixture has a chance to dry out. Place them 16 inches apart. Put in place a vapor barrier. Allowing the concrete to dry too much between pours will create layers and make the concrete weaker.

Install wire mesh or fiber mesh as reinforcement. If more than 2 5 cm 1 inch shim the joists near the door trim the joists at the opposite end or do both. 6 empty a 40 pound bag of concrete resurfacer into a 5 gallon bucket to make. 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.