How To Put A Concrete Floor In An Existing Garage

Fill in the area with gravel 3 4 and compact it.

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. Place them 16 inches apart. The taller the joists the more room for insulation and warmth of the floor. Lay an impermeable membrane on the raw concrete as a vapour barrier.

Measure the slope if any of the floor from the garage front to the door. Nail cross blocking boards to hold the joists together every 4 feet. Divide the garage into sections no larger than 144 square feet each. Put in place a vapor barrier.

Lay the joists on edge across the width of the floor. You do not need to wait for the scratch coat layer to dry completely. Have the bars prepared before pouring. Pour concrete for the new floor.

These bars will provide strength to the concrete. Laying a concrete floor in an existing building takes some special skills and tools. This is especially important in a wet climate. 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. 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. Add all of the concrete right away so none of the mixture has a chance to dry out.

You can set screed guides rails that you first use to get it flat then pull and fill in the void they leave. You can use a dense foam insulation around the edge of the slab and use that to guide your screeding. 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. 6 empty a 40 pound bag of concrete resurfacer into a 5 gallon bucket to make.