How much does spalling concrete repair cost in Utah?

Spalling concrete repair costs $3 to $5 per square foot in HomeGuide’s national guide. That comes to $1,800 to $4,200 for a 2 car, 600 square foot driveway. HomeAdvisor says surface spalling on a driveway is often a repair of a few hundred dollars. Fixr puts resurfacing a spalled driveway at $2.50 to $4 per square foot.

Complete Concrete Coatings has been repairing and coating Utah concrete since 2005, from our shop in Centerville. The prices here come from national cost guides, and every table row names its source. None of them are quotes from us. How our crew fixes spalls is on our concrete repair service page.

What is spalling concrete, and why do Utah slabs spall?

Spalling is when the top layer of concrete flakes away. HomeGuide says it leaves a pitted surface and can expose the stone or steel inside. It starts with moisture in the concrete and is most common where slabs freeze and thaw. Rock salt and de-icing chemicals make it worse.

Water takes up more room as ice. The U.S. Geological Survey says ice is about 9 percent less dense than liquid water. So water that soaks into a slab pries at the surface each time it freezes. After enough winters, the top layer breaks off in flakes.

Salt Lake City winters swing back and forth across the freezing mark. Airport normals for 1991 to 2020 put the January high at 38.6 F and the low at 24.2 F. The airport also averages 51.9 inches of snow a year. A wet driveway can freeze overnight and thaw by afternoon, day after day.

The National Ready Mixed Concrete Association (NRMCA) calls freeze-thaw flaking by another name, scaling. Its guide defines scaling as the local flaking or peeling of a finished surface from freezing and thawing. HomeGuide prices spalling and scaling as one repair.

NRMCA lists excess calcium or sodium chloride deicing salt on weak or poorly cured concrete as a cause of scaling. UDOT pre-treats roads with salt brine before a storm and spreads salt during it. Its crews clear state and federal routes such as State Street (US-89) and Redwood Road (SR-68). Cars track that salt home and drop it on driveways and garage floors.

Some slabs flake early because of the original pour. NRMCA says overworking the surface during finishing makes it prone to scaling in freezing weather. Poor curing often leaves a weak surface skin too.

How much does spalling concrete repair cost by method?

Patching a few spalls costs the least, and replacing the slab costs the most. HomeGuide puts spalling repair at $3 to $5 per square foot on a driveway. On a garage floor, it lists $500 to $3,000 or more. Fixr prices resurfacing a spalled driveway at $2.50 to $4 per square foot.

Here is concrete spalling repair cost by method, from three national cost guides.

These are national market ranges. A quote for your slab comes from an on-site look. HomeGuide adds minimum service fees of $100 to $250 on driveway repairs. Fixr prices pitting at $1.75 to $2 per square foot, below its $2.50 to $4 line for spalling.

Can spalled concrete be repaired, and how is it fixed?

Yes, most of the time, if the slab sits level and is sound underneath. We cut spalled areas back to sound concrete and patch them with polymer-modified mortar, which bonds to the old slab. A patch on its own is still bare concrete. So most repairs finish under a coating, an overlay or a sealer.

We start with the cause, because the fix depends on it. A patch fails when the cause is still working. Water running under the slab will push a patch back off, and so will a slab that keeps moving.

NRMCA’s repair advice backs this up. It says a repaired surface will only be as strong as the base it bonds to. Polymer-modified repair mortar is one of the thin bonded repair materials it lists.

The patch then needs a cover. A bare patch soaks up water and salt again, and the repair line stays visible. On a garage floor, the cover is usually a flake epoxy or polyaspartic system that hides the patchwork. On a driveway, porch or patio, it may be an overlay with color and a clear top coat.

One customer’s Google review reads: “Complete Concrete Coatings repaired all my damaged concrete, including my very old porch, covered it in the color I selected then applied a clear coat.”

Should you patch, resurface or replace spalled concrete?

It depends on how much of the slab is damaged and how deep the damage goes. HomeGuide says limited spalling can be patched, while extensive spalling may need resurfacing. HomeAdvisor says that past 25 to 30 percent visible damage, the whole driveway needs repaving. A sinking slab needs a lifting contractor first.

Resurfacing fits a slab that is worn across the whole surface but still sits level and sound. The spalls get repaired first, then an overlay recovers the whole slab. Our concrete resurfacing page covers that work. Overlay prices by surface are in our concrete resurfacing cost guide.

We do not do slab lifting, mudjacking, polyjacking, foundation work or full tear-out and re-pour. The replacement and lifting prices above are there so you can weigh a repair against the bigger jobs.

What changes the cost to repair spalling concrete?

How much of the slab is damaged drives the price most. How deep it runs comes next, since deep damage takes more cutting and more material. What goes over the repair moves the number again. A bare patch costs less than one finished with a sealer, a color overlay or an epoxy system.

On a garage floor, labor is most of the bill. HomeGuide says labor makes up 50 to 70 percent of most garage floor repair projects. Access adds to it. HomeGuide notes that narrow driveways, where materials go in by wheelbarrow, raise labor time and cost.

Old coatings add work too. NRMCA says a surface for repair should be free of dirt, oil or paint, and it must be sound. So a failed coating comes off first, and our crew strips it with a diamond grinder. A slab with a weak top layer from a bad pour also takes more cutting and more material.

Timing changes the bill as well. HomeGuide says filling cracks and potholes as soon as they appear keeps damage from spreading. In Utah, a hairline crack can turn into flaking, pitting and pop-outs in a few seasons.

How do you keep spalling from coming back?

Keep water and salt off the surface. That means a coating or sealer over the repair, and rinsing road salt off the slab during winter. NRMCA’s rules to prevent scaling include sealing the surface. Its guide points to breathable silane or siloxane sealers made for concrete slabs.

Watch what goes on the ice. NRMCA says never to use ammonium sulfate or ammonium nitrate as a deicer. Both are in most fertilizers, and NRMCA says they destroy concrete surfaces. It also says salt water left standing by poor drainage can cause scaling.

Repairs last longer when the cause is fixed. HomeGuide says garage floor repairs typically last 5 to 15 years, depending on quality, materials and wear. It adds that fixing causes like poor drainage helps a repair last its full lifespan.

On a sound driveway, porch or patio, a sealer before winter keeps water and salt out of the concrete. Our concrete sealing page covers that work. Our guide to sealing a concrete driveway in Utah covers the pros, cons and timing.

How do you get a real price for spalled concrete?

A real number for your slab needs an on-site look. We give a price after we look at the slab in person, and the estimate is free. We check the damage and tell you the cause and how far it goes. You get a written price for the repair and the finish you pick.

If the slab is past repair, we say so instead of coating it. That written price lets you weigh a repair against what a tear-out and re-pour would run.

Call (801) 347-4518 Monday through Friday, 8am to 5pm, or ask for a free on-site estimate.