Home / Concrete Repair / Crack Repair
Concrete Crack Repair in Pittsburgh, PA
A crack that is still moving needs a different fix from one that has stopped. We check which one you have before we pick a product. Free on-site estimate.
Almost every concrete slab in this region cracks eventually. That by itself is not a defect, and it is not a reason to panic or to tear anything out.
What matters is what the crack is telling you. A hairline that has looked the same for six years is a maintenance item. One that has widened since last spring, or where one side now sits higher than the other, is a symptom of something happening underneath.
Reading a Crack Before Filling It
Run your hand across it. If both sides sit level and the edges are tight, you are most likely looking at a shrinkage crack, formed when the slab cured and gave up water faster than it could handle. Those are cosmetic and they stay put.
If one side has lifted or dropped relative to the other, the concrete did not move on its own. The ground under it did, and sealing the top will hide that for a season without changing anything. That slab needs support before it needs filler.
The third case is the crack that keeps widening. Measure it, mark the ends with a pencil, and look again after a freeze-thaw cycle or two. A crack that is still traveling needs a flexible repair that can move with it, not a rigid one that will simply crack again beside the old line.
Where We See Cracking Most Often
Concrete crack repair covers a lot more than driveways. These are the surfaces Pittsburgh property owners call us about most, and each one fails in a slightly different way.
- Patios and pool decks, where slabs are thin and joints were often left out
- Sidewalks and walkways, where a lifted edge turns a crack into a trip hazard
- Concrete steps and porch landings, cracking where backfill has settled beside the foundation
- Garage floors, cracking along the door line where salt and meltwater collect
- Basement floors, where slab cracks often trace back to hydrostatic pressure
- Retaining wall caps and curbing, where freeze-thaw works on exposed edges
Driveways have their own failure pattern because of vehicle loads, plow blades and the apron sitting in the public right-of-way, so we handle that separately on our driveway crack repair page.
How Concrete Crack Repair Is Done Properly
The difference between a repair that lasts and one that reopens is nearly always preparation. Filler poured into a dirty, unopened crack has almost nothing to grip.
1. Diagnose the crack
We check width, edge alignment and whether the two sides sit level, then look for the cause. A crack running straight out from a corner tells a different story from one following a settled edge, and the fix follows the cause.
2. Rout the crack open
Filling a tight crack does not work. We saw or grind it into a clean channel with square walls, which gives the sealant real surface area to bond to and lets it flex without tearing away from the sides.
3. Clean it out completely
Dust, loose aggregate and old failed filler all come out. Anything left in the channel becomes a bond breaker, and that is the most common reason a previous repair let go.
4. Match the material to the movement
Dormant cracks in flat work take a flexible polyurethane or polyurea sealant. Structural cracks in walls and footers take epoxy injection, which welds the two faces back together. Using either one in the wrong place is a wasted repair.
5. Finish level and seal the surface
The repair gets tooled flush so it sheds water rather than holding it, and where the surrounding slab is worth protecting we seal it afterward so chlorides stop soaking into the concrete either side of the fix.
When a Crack Means the Slab Is Finished
There is a point where filling stops being sensible. A slab cracked in several directions at once, with pieces that move independently underfoot, has lost the structure that made it a slab. Repairing that is a down payment on doing the job twice.
The same applies when spalling has opened up alongside the cracking. Once the surface is breaking away over a wide area, there is nothing sound left for a sealant to bond to, and the honest answer is partial or full replacement of that section.
In between there is a genuine judgment call, and it depends on how much of the slab is still sound, whether the drainage that caused the problem can be corrected, and how long you plan to stay. We will walk it with you and say which way we would lean if it were our own property.
Concrete Crack Repair Across the Pittsburgh Area
We take on concrete crack repair throughout Pittsburgh and the surrounding communities, including Squirrel Hill, Shadyside, Point Breeze, Brookline, Carrick, Greenfield, Mt. Lebanon, Bethel Park, Dormont, Whitehall, Baldwin, Scott Township, Carnegie, Ross Township, Shaler, Glenshaw, Allison Park and Bellevue.
East of the city, through Monroeville, Penn Hills, Plum, Forest Hills, Wilkinsburg, Swissvale, Verona and Oakmont, mature tree roots are behind a large share of the cracked and lifted walkways we are called out to look at. We check for that before recommending a repair that a root would simply undo.
Concrete Crack Repair FAQs
How do I know if a concrete crack is structural?
Level edges and a stable width usually mean cosmetic. A crack where one side sits higher than the other, or one that keeps widening season over season, points to movement underneath and needs the cause addressed before anything gets filled.
Can I just use a crack filler from the hardware store?
On a hairline crack in a patio it may hold for a while. The limitation is preparation. Without routing the crack open and cleaning it out, the filler has very little to bond to, which is why those repairs commonly reopen within a year or two.
Will the repair be invisible?
No. A sealed crack is a visible line, because a flexible sealant cannot be color-matched to weathered concrete and still perform. If appearance is the priority, an overlay across the whole surface is the option that actually hides it.
How long does concrete crack repair last?
A properly routed, cleaned and sealed dormant crack holds for years before the sealant needs renewing. What shortens it is unaddressed water, so extending downspouts and keeping joints sealed does more for longevity than the filler itself.
Do you repair cracks in basement floors and walls?
Yes. Floor cracks are usually sealed at the surface, while wall cracks that are structurally significant are repaired by injection. Both start with finding out where the water is coming from, because the repair is temporary otherwise.
Is there a season when crack repair should not be done?
Cementitious materials need consistent temperatures above roughly 50 degrees to cure properly, which closes the window in late fall. Cracks should also be repaired when they are at their widest, in cold weather, so the sealant is not stretched beyond its range later.
Get Your Cracked Concrete Assessed
Send a photo with something for scale beside the crack, like a coin or a key. We will come out, check whether it is moving, find what caused it, and put the recommended scope in writing.