MINNESOTA CONCRETE FLOOR COATINGS

Why Your Concrete Garage Floor Cracks and How to Fix It

Concrete cracks. This is one of those facts of life we are all aware of even in grade school. The concrete on the sidewalk on your walk to school is cracked. The concrete of your home driveway is cracked. And the concrete of the slab inside a home garage is also very likely to be cracked. This happens because concrete is not a perfect material. It dries unevenly, swells and contracts with the weather, and is not flexible enough to endure years of use flawlessly.

So when your home or business garage floor is cracked, it may be frustrating but it comes as no surprise. Of course, you may be wondering why your concrete cracks, has cracked, or why newly poured concrete will crack along with what you could do about it.

Causes of Concrete Garage Floor Cracks

Too Much Moisture in the Mix

When there is too much water in the original concrete mix, evaporation causes the porous material to contract too much as it dries which causes very thin radiating cracks that may go as deep as the entire slab.

The Surface Dries Too Fast

On a hot or windy day, the surface of a poured concrete slab may dry before the rest of the concrete. This can create a superficial spiderweb of cracks over the surface as you have likely seen many times in sidewalks where fast surface drying is most common.

Too Much Weight on the Slab

While rare in garages, placing an excessive amount of weight on a concrete slab can cause it to buckle and crack. This can happen even if the excessive weight is only temporary. If the slab is not thick enough to support the heavy object, it will crack.

Cold: The Ground Froze and Swells

When the ground freezes, it swells which will push concrete upward. With nowhere to go, a concrete slab will buckle in the other direction and partially shatter. Much in the same way it would when a tree root grows underneath.

Heat: The Concrete Expands

In converse, concrete swells in the heat and will push against itself causing expansion cracks. Sidewalks and garages are particularly subject to expansion cracks as they often reach the highest temperatures during the summer.

The Ground Settles

Ground settling beneath concrete has always been a problem, and your garage floor responds the same way a home foundation does. The concrete cracks and breaks away from itself, pulling apart as the ground settles. This is where chasm cracks often come from.

How to Fix Your Cracked Concrete Garage Floor

There are very few ways to truly repair a concrete garage floor once it is badly cracked. Many homeowners and venues try to fill the cracks and resurface, but this usually leaves a marred surface that is still likely to crack again.

Fill the Cracks

If there are cracks in your concrete, they can be filled with a variety of special compounds ranging from new mixes of concrete to resin sealants. This will at least patch the gaping hole and increase the current safety of your concrete floor but the floor is likely to continue cracking as the same pressures are applied.

Resurface the Concrete

After cracks are filled, a new layer of concrete patch can be applied to resurface and level broken concrete. This, however, will always look patched even when the surface is leveled.

Install an Epoxy Resin Floor

The most effective way to simultaneously fill cracks, resurface, and reinforce your cracked concrete floor is an epoxy or polyurethane floor coating installation. The resin used for both epoxy and polyurethane are similar to the resins already commercially used to fill the cracks. The first layer of resin fills the cracks and levels the surface and additional layers create a highly resistant floor that will also prevent the concrete underneath from experiencing further damage.

Benefits of A Resin Floor Over Cracked Concrete

A resin garage floor coating of epoxy or polyurethane is the ideal solution for a cracked concrete garage floor. Whether your floor cracked due to heat, cold, or poor initial installation, a new resin garage floor will prevent further damage. This highly durable flooring option makes use of the structural value of a concrete garage floor while providing a smooth, moppable, and temperature-flexible surface that is suitable for long-term indoor and outdoor use. To find out more about repairing your cracked concrete garage floor with an epoxy floor or polyurethane floor installation, contact us today!


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