How To Put A Concrete Floor In An Existing Garage

Place duct tape over existing expansion joints.

How to put a concrete floor in an existing garage.

Put in place a vapor barrier. You can set screed guides rails that you first use to get it flat then pull and fill in the void they leave. 6 empty a 40 pound bag of concrete resurfacer into a 5 gallon bucket to make. Place them 16 inches apart.

You can use a dense foam insulation around the edge of the slab and use that to guide your screeding. Install wire mesh or fiber mesh as reinforcement. Laying a concrete floor in an existing building takes some special skills and tools. 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.

Nail cross blocking boards to hold the joists together every 4 feet. The taller the joists the more room for insulation and warmth of the floor. Measure the slope if any of the floor from the garage front to the door. Have the bars prepared before pouring.

These bars will provide strength to the concrete. Lay the joists on edge across the width of the floor. Allowing the concrete to dry too much between pours will create layers and make the concrete weaker. If more than 2 5 cm 1 inch shim the joists near the door trim the joists at the opposite end or do both.

This is especially important in a wet climate. Pour concrete for the new floor. Some are designed to be left in place as expansion joints. Fill in the area with gravel 3 4 and compact it.

Add all of the concrete right away so none of the mixture has a chance to dry out. Lay an impermeable membrane on the raw concrete as a vapour barrier. Pour concrete onto the existing slab until it is around where you want the final level to be. 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.