Concrete Repair in Ann Arbor, MI

Stop Small Cracks Before They Take the Slab

Cracks up to 1/4 inch take a standard filler, while anything 1/2 inch and wider needs undercutting, a backer rod, bonding adhesive and layered patching. Past 1/2 inch, a crack can be telling you something structural. Widespread deep cracking together with settlement usually points to replacement instead. Danaher Family Masonry and Restoration handles residential and commercial concrete repair in Ann Arbor, MI, from hairline sealing and epoxy injection to resurfacing, spall patching and driveway and walkway repairs.


Timing matters as much as method, since curing has to start within 30 minutes of finishing and sealer cannot go on for at least 30 days afterward. You get a straight answer about whether a slab is worth saving, priced against what replacement would run, backed by 40 years of patching, resurfacing and pouring around Washtenaw County. Tell us what your concrete is doing on our contact page and we will set up a consultation and an estimate.

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Our Concrete Repair Solutions for Your Property

  • Crack Repair

    Width decides the method more than anything else. Anything up to 1/4 inch takes a standard crack filler, while cracks 1/2 inch and wider get undercut to a sound edge, backed with a rod, coated with bonding adhesive and patched in layers.

  • Concrete Resurfacing

    Polymer-modified resurfacer rebuilds a worn surface from a 1/16 inch feather edge up to a maximum 1/2 inch. Placed between 50 and 90 degrees, it reaches 5,500 to 6,500 psi at 28 days, walkable in 8 hours and drivable in 24.

  • Spalling and Surface Repair

    Scaled and spalled surfaces come from water and deicing salt working into concrete that lacked enough entrained air. We grind back to sound material, patch with a bonded repair mix, and advise against chemical deicers so the new surface is not attacked.

  • Epoxy Injection Repairs

    Injected epoxy restores structural continuity in cracks as narrow as 0.002 inch, with ports about 8 inches on center. It is the wrong choice for a crack still moving or one driven by corroding reinforcement, so we address the cause first.

  • Concrete Wall and Floor Repairs

    Basement walls, garage floors and interior slabs each fail differently, so the repair follows the crack, not a template. Static cracks get injected or filled, spalled edges get rebuilt to a square profile, and moving joints get treated as movement rather than damage.

  • Driveway and Walkway Repairs

    Traffic surfaces take the worst of it, with load, runoff and salt hitting the same panels every winter. We patch spalled sections, fill working cracks, correct slope where water sits, and resurface when the wear is broad but the slab is sound.

Why Choose Us for Concrete Repair

A Straight Repair-or-Replace Answer

Some slabs are worth saving and some are not, and you deserve to hear which before spending anything. A patch on failing concrete buys months, so we say when repair makes sense and when your money is better put toward a new pour.

Patches That Bond and Stay

Prep is what keeps a patch in place. Feather-edged material over a dirty or unsound surface lifts within a season, so edges get undercut, loose concrete gets removed and bonding adhesive goes on before any repair mix is placed.

Colors Blended Into the Surrounding Slab

Fresh repair material almost never matches aged concrete straight from the bag, which is how patchwork ends up looking like patchwork. We tune the mix and finish texture toward the existing surface so the repair reads as part of the slab.

Root Causes Addressed First

Filling a crack without asking why it opened just moves the problem a few inches sideways. Poor subbase, water sitting against the slab, corroding steel and missing control joints all get looked at before anything gets sealed or patched.

Surfaces Back in Use Quickly

Most repairs here do not take your driveway out of service for long. A resurfaced slab is walkable in 8 hours and drivable in 24, and we sequence work so the areas you actually need stay usable while curing finishes.

Years Added to What You Already Own

Replacing a driveway means tearing out concrete that may still have a sound base and structure underneath. Targeted repair keeps that investment working, holds off the mess and expense of a full pour, and gives you a surface that looks cared for.

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Repair Now, Replace Much Later

Concrete rarely fails all at once. It gives you a hairline, then a 1/4 inch gap, then a spalled edge, and each stage is cheaper to deal with than the one after it. Danaher Family Masonry and Restoration repairs driveways, walkways, patios, garage floors and basement walls in Ann Arbor, MI, matching the method to the crack instead of selling the same fix to everyone. If a slab you own is starting to look tired, there is no rush and no pressure to decide today. Send the details through our contact page or request a quote, and we will arrange a consultation.

Frequently Asked Questions

  • Should hairline cracks in concrete be repaired?

    Yes, sealing early is cheap insurance, because open hairlines let water in and roughly 42 freeze-thaw cycles a year widen what starts as nothing. Left alone, a hairline becomes a 1/4 inch crack that needs a filler instead of a simple seal.

  • What is the best filler for concrete cracks?

    Crack width decides the answer more than brand does. Up to 1/4 inch a standard concrete crack filler works, while 1/2 inch and wider calls for undercutting, a backer rod, bonding adhesive and layered patching rather than a single pour of product.

  • What is the most common cause of concrete spalling?

    Freeze-thaw action combined with deicing salt is the usual culprit, especially on flatwork poured without enough entrained air. Concrete meant for salted, freezing conditions needs 6 to 7% air and 4,000 psi at 28 days to resist surface scaling.

  • How long does concrete resurfacing last on a driveway?

    Properly placed polymer-modified resurfacer reaches 5,500 to 6,500 psi at 28 days, which is stronger than most original driveway concrete. Life expectancy depends on the slab beneath it, on drainage, and on how much deicing salt the surface sees each winter.

  • Is resurfacing a concrete driveway a good idea?

    Resurfacing works well when the slab underneath is structurally sound and the damage is surface wear, scaling or shallow spalling rather than settlement. Danaher Family Masonry and Restoration assesses that on driveways across Ann Arbor, MI before recommending it.

  • Is epoxy good for cracked concrete?

    Epoxy injection is excellent for structural cracks that are dormant, bonding material as narrow as 0.002 inch back into one piece. It is a poor choice where the crack is still moving or where reinforcement inside the concrete is corroding.

  • Can you put new concrete over an old concrete driveway?

    Thin overlays are limited: polymer-modified resurfacer runs from a 1/16 inch feather edge to a maximum 1/2 inch. A full-depth new slab over old concrete is usually the wrong approach, since the failures underneath telegraph straight through the new pour.

  • Will salt ruin a concrete driveway?

    Rock salt accelerates surface scaling, and no chemical deicer should touch concrete through its first winter. Danaher Family Masonry and Restoration repairs salt-scaled driveways throughout Ann Arbor, MI and recommends rock salt only, used sparingly, after that first season.