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How to Pour a Concrete Floor for an Existing Garage

You notice that the concrete floor in your garage is in need of replacement. But you may be a bit anxious about the project, because you may have to it yourself to save money. We got you covered.

So here is a basic process for pouring your concrete floor:

Step 1: Clean Your Existing Floor

Let’s assume that you’re pouring over an existing cement floor and that there will be no height issues by your doors.

Sweep your existing floor clean from dirt and debris. The cleaner it is the better bond you will achieve with the new concrete.

Use a pressure washer to get whatever your broom couldn’t. You can rent one easily, and some people even own them.

If your existing floor is stained, try to find a heavy duty cleaner so that those stains do not interfere with the bonding process.

Step 2: Measure Out Your Slab

Take your measuring tape and determine your slab’s length, width, and height, and write them down.

Take multiply the length by the width by the height (or depth). Then multiply this number by 10% to account for spillage. This number tells you how much concrete you will roughly need. It’s always good to have more than you need.

Create your form using boards to help keep the wet concrete contained in your proposed slab area when it’s poured. Think of your form as a mold that will hold your concrete that will become your new floor.

Lay down wire mesh or rebar inside the slab area to add extra strength to the final product.

Step 3: Prepare & Pour Your Cement

Wherever you pick up your cement, double check with a store associate to make sure you get the right number of bags for the job. You don’t want to go back in the middle of pouring because you didn’t buy enough.

Following the instructions on the package, mix your cement in a wheelbarrow or 5-gallon pail. Then pour the concrete evenly across the space of the form. Use a trowel to do even the cement as you go.

Once the form is filled, continue to even the cement up to where the top of the slab should be. Make sure there are no air pockets. o

Let the slab dry for one day, remove the form. If you have trouble removing the boards, allow for more drying time.

Curing times may differ, depending on the product, so follow the directions given on the package before you walk on it.

Once it’s fully dry, it’s done.

So if you’re brave enough to take on a project like this, we hope this process will be helpful. But if you change your mind, find a good contractor – like Patriarch Construction – to do it for you.

Here are some answers to a few questions that people sometimes ask us:

What is the cost of a concrete garage floor?

The cost is between $12-$14 per square foot.

How many inches of concrete do I need for a garage floor?

A garage floor should be at least 6-8 inches thick and should have rebar installed.

Is concrete better than cement?

You might think they’re the same, but it’s not true. Cement is the powder you mix with water, while concrete is cement with small pebbles and rocks.

Depending on the application concrete is better than just cement because the pebbles and rocks give it added strength. If you have any other questions about concrete or want to discuss your project, please feel free to give us a call.

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