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Patio Resurfacing and Repair in Pittsburgh, PA
Most tired patios do not need tearing out. What they need is the drainage fixed and the surface renewed, in that order. Free on-site estimate.
Why does a patio that was fine for fifteen years suddenly start holding water against the back of the house?
Nine times out of ten the slab has not failed. It has moved, because something under one edge of it washed out or settled, and the pitch that used to carry water away now carries it the wrong direction.
What Actually Goes Wrong with Pittsburgh Patios
Patios sit at the low point of most back yards, which means they collect whatever the roof and the slope send toward them. A downspout discharging near a patio edge is the single most common cause of settlement we find.
Clay subgrade makes it worse. Red bed claystone across much of Allegheny County swells and shrinks with the seasons, so a patio slab that was placed on unprepared clay gets worked up and down until it cracks or drops at one corner.
Then there is the surface itself. Patios take less salt than a driveway does, but they take full sun, standing water and freeze-thaw, so scaling, staining and a generally worn-out look arrive on their own timetable.
Working Out What Your Patio Needs
Repair, resurface and replace are three different answers, and the right one depends on what the slab is doing rather than how it looks.
- Water now stands on the surface or runs back toward the house
- One section has dropped and there is a lip where it meets the next
- The slab sounds hollow underfoot near an edge
- Cracking runs in one or two lines with the edges still level
- The surface is flaking, stained or simply dated, but the slab is solid
- A previous patch or overlay has lifted away from the concrete
The first three point to movement underneath, which has to be corrected before any new surface goes down. The last three are surface problems on a sound slab, which is where resurfacing does its best work.
How a Patio Gets Put Right
The order matters more than the products. Renewing a surface over a slab that is still moving buys you one good season and then puts you back where you started.
1. Trace the water first
We follow the downspouts, the grade and the direction of fall before looking at the concrete. If the cause is still active, correcting it is part of the scope rather than an optional extra.
2. Sound the slab for voids
Tapping across the patio shows where it is still supported and where it is spanning air. That tells us whether settled sections can be lifted back to grade or whether the base is gone.
3. Level and stabilize before resurfacing
Settled areas get lifted and the void underneath filled, so the patio is back on solid support and back at the right pitch. Dormant cracks are routed and sealed at this stage too.
4. Prepare the surface properly
Grinding or shot blasting removes old sealer and opens the concrete, and any delaminating material comes off entirely. An overlay bonded to a layer that is already letting go comes away with it.
5. Place the new surface and seal it
A polymer-modified overlay goes down over the bond coat and is finished smooth, textured or stamped. Once cured it gets sealed, which is what protects the finish through the winters that follow.
When a Patio Is Genuinely Finished
There is a point where repair stops making sense. A slab cracked in several directions with sections moving independently underfoot has lost the structure that made it a slab, and no surface treatment changes that.
The same applies where the base has washed out badly enough that lifting will not hold, or where the patio was placed at an elevation that was wrong from the start and sits too high against the siding.
In between, most patios are worth keeping. If the concrete is sound and the only problems are pitch, a settled corner and a tired surface, you are looking at a straightforward job rather than a rebuild, and we will tell you that plainly.
Patio Repair Across the Pittsburgh Area
We repair and resurface concrete patios throughout Pittsburgh and the surrounding communities, including Squirrel Hill, Brookline, Greenfield, Point Breeze, Regent Square, Mt. Lebanon, Dormont, Bethel Park, Whitehall, Baldwin, Scott Township, Ross Township, Shaler, Glenshaw, Monroeville, Penn Hills and Plum.
Hillside properties through the South Hills and the city neighborhoods see the most drainage-driven settlement, because there is simply more water moving across the yard. Older patios in the Mon Valley boroughs are more often surface-worn than structurally gone.
Patio Resurfacing and Repair FAQs
Can a cracked patio be resurfaced?
It depends on whether the cracks are dormant and the slab is stable. Dormant cracks are routed and filled before the overlay goes down. Active cracks telegraph through a new surface within a year, so the movement has to be addressed first.
Why does my patio hold water now when it never used to?
The slab has almost certainly settled and lost its pitch. Something under one edge washed out or compressed, usually water from a downspout or the slope above. Lifting that section back to grade restores the fall.
Is resurfacing cheaper than replacing a patio?
It is generally the less disruptive route, since there is no demolition, no disposal and no new base work. Whether it is the right call depends entirely on whether the slab underneath is sound, which is what the site visit establishes.
How long does a resurfaced patio last?
On a properly prepared, structurally sound slab, a bonded overlay that is sealed and maintained lasts many years. What shortens it is unaddressed drainage, trapped moisture, or preparation that was rushed.
Can you fix just the section that has settled?
Often, yes. Lifting the dropped area back to grade and leaving sound concrete alone is usually the sensible approach. Where the finish then differs between old and lifted sections, resurfacing the whole patio gives a uniform result.
What is the best time of year for patio repair?
Late spring through early fall. Overlays and repair mortars need consistent temperatures above roughly 50 degrees through placement and cure. Slab lifting with polyurethane foam cures chemically and can run later into the season.
Find Out What Your Patio Actually Needs
Send a photo of the patio and one of where the downspouts discharge. We will sound the slab, trace the water, and tell you honestly whether this is a lift, a resurface or a rebuild.