Garage Slabs and Garage Floor Replacement in Denver

Denver Concrete Company replaces cracked and settled garage floors and pours new garage slabs across the Denver metro. Garage slabs run $14 per square foot. A 20 by 20 foot two-car garage is about $5,600, and a 24 by 24 foot garage is about $8,100. Estimates are free, on site and in writing.

Signs Your Garage Floor Needs Replacing

• Wide or uneven cracks. Hairline cracks are normal. Cracks where one side sits higher than the other mean the slab has moved.
• Settling. A floor that has dropped along the walls or at the door, or that leaves a gap under the garage door.
• Pitting and flaking. Road salt and de-icer drip off your car all winter and eat the surface where the tires sit.
• Standing water. Puddles that stay put mean the floor no longer slopes toward the door.

If the concrete is sound and has only sunk, lifting may be an option. We compare the two in concrete replacement versus mud jacking in Colorado.

How We Replace a Garage Slab

1. Clear and remove. You empty the garage, and we break out and haul away the old slab.
2. Fix what failed. We check the soil under the slab, then add and compact base so the new floor sits on a solid, even platform.
3. Set the slope. We grade the floor to fall toward the door so snowmelt and wash water run out, not toward the house.
4. Pour 4,500 PSI concrete. We pour a stronger mix than the common 4,000 PSI because garage floors take vehicle weight and road salt. Read why we use a 4,500 PSI mix.
5. Finish and joint. We finish the surface and cut control joints so any cracking follows straight, planned lines.

Plan to keep vehicles off the new floor for about a week while the concrete gains strength. We will give you exact timing for your pour.

New Garage and Shop Slabs

Building a detached garage, a workshop or a shed? We pour the slab your builder or kit needs, including thickened edges where the plans call for them. Send us the drawings or the manufacturer’s slab requirements and we will price it. For equipment and heavier loads, see our commercial concrete services.

Add an Epoxy Floor Coating

A new slab is the ideal base for a coating. An epoxy garage floor coating runs $6.50 to $8 per square foot with a $3,000 minimum. It resists oil, salt and hot tires and makes the floor easy to clean. New concrete needs time to cure before it can be coated, so we schedule the coating after the slab is ready. Learn more in our guide to epoxy floor coatings and what polyaspartic is.

While We Are There

Many customers replace the garage floor and the driveway together. One mobilization covers both, and the new apron lines up cleanly with the new floor. A salt protector on both surfaces helps them last.

Garage Slab Questions

How much does a garage slab cost in Denver?
$14 per square foot. A standard two-car garage of 400 to 576 square feet costs about $5,600 to $8,100.

Do I have to empty my garage?
Yes. Everything on the floor needs to come out before we start, including shelving that rests on the slab.

Can you pour a garage slab in winter?
Often, yes. A garage is sheltered, which helps, and we schedule around the temperatures the concrete needs to cure.

Should I coat my new garage floor?
A coating is optional, but it is the best protection against road salt and stains, and it is easiest to do on a new, clean slab.