Concrete Patio Repair in Gaithersburg, MD

Concrete patio repair targets the specific areas where a patio has failed — a crack that has opened across the slab, a section that has settled below the rest, a corner that has broken off, or a surface that has spalled and scaled. The goal is to extend the life of an otherwise usable patio by addressing the damaged areas rather than replacing the entire slab.

Not every damaged patio is a repair candidate. A patio with one or two isolated cracks and stable surrounding concrete may be a good repair prospect, while one with widespread cracking, poor drainage, or a failed base usually needs resurfacing or full replacement. The right call depends on the actual condition of the slab and whether the cause of the damage is still active.

Because a patio often sits directly against the home, how it drains matters as much as how it looks. Water pooling on or running beneath the slab contributes to settlement, cracking, and surface deterioration, so drainage is part of the repair evaluation — not an afterthought.

Patio defects fall into a few categories, and each points toward a different solution. Some are surface-level; others indicate base movement or drainage failure that patching alone will not solve.

Patio Defects We Assess

• Cracking — from shrinkage, settlement, or movement without a confirmed cause
• Settlement — low or uneven areas where the slab has dropped
• Spalling and flaking — surface concrete breaking away, often from freeze-thaw or moisture
• Broken edges — chipped or missing concrete at the patio perimeter or adjoining surfaces
• Failed joints — deteriorated control or expansion joints allowing water entry
• Drainage issues — water pooling on the surface or running toward the house
• Failed previous repairs — old patches and mismatched sections

Settlement is a separate consideration. A single low spot on an otherwise sound patio may be a leveling candidate rather than a repair one — concrete leveling can lift the settled area back toward grade without patching. We evaluate whether the slab is suitable for leveling or whether the damage warrants repair or replacement.

For new patio installation, see our concrete patio installation and replacement page. For surface-level wear on a stable slab, see concrete resurfacing and overlays.

A durable patio repair depends on understanding the cause and preparing the surface as much as on the repair material itself. A patch applied over an active crack or wet, contaminated concrete will not last.

1. 1Slab inspection — evaluate cracks, settlement, surface condition, and drainage.
2. 2Crack assessment — determine width, depth, and whether movement is ongoing.
3. 3Settlement measurement — quantify elevation differences across the patio.
4. 4Water movement review — check where runoff pools or runs beneath the slab.
5. 5Joint inspection — assess control and expansion joints for failure.
6. 6Prior patch identification — locate old repairs and mismatched sections.
7. 7Repairable area definition — mark which areas can be repaired versus replaced.
8. 8Damaged concrete removal — cut back to sound material where patching is needed.
9. 9Repair, leveling, or replacement — perform the appropriate fix for each area.
10. 10Finishing and curing — match the surrounding texture and allow the repair to gain strength.

A repaired section will not perfectly match older, weathered surrounding concrete in color or texture. We are straightforward about that expectation. Where a seamless appearance matters most, resurfacing or replacement may deliver a more consistent finish than a localized patch.