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CRUMBLING CONCRETE STEPS:
PATCH OR REPLACE?

Front steps take a beating from DMV freeze-thaw cycles and winter salt. Over time the surface flakes, the edges crumble and the steps can pull away from the house. Patching makes sense for some damage and is a waste of money on others.

TYPES OF DAMAGE

DamageWhat It Looks LikeUsually
Surface scaling / spallingFlaking top layer, rough surfacePatch or resurface
Chipped edges or nosingsBroken step edgesPatch with form
Hairline cracksThin cracks, no movementSeal
Wide cracks, sections shiftingUneven steps, gapsReplace
Steps pulling away from houseGap at the foundationReplace (and check drainage)
Hollow sound, exposed rebarCrumbling interiorReplace

WHEN PATCHING WORKS

If the steps are structurally sound (not moving, not hollow), surface damage can be repaired:

  1. Chip away loose concrete to a sound base.
  2. Clean and apply a bonding agent.
  3. Rebuild edges with a polymer-modified repair mortar using a form.
  4. Resurface the treads if scaling is widespread.
  5. Seal once cured.

A good patch can last several years. A bad patch, thin mortar over crumbling concrete, pops off in one winter.

WHEN TO REPLACE

If the steps have shifted, sound hollow, have exposed or rusted rebar, or are separating from the house, they need to be demolished and rebuilt. Replacement is also the time to fix the rise and run if the steps were never to code, and to add a proper handrail.

TYPICAL COSTS

JobTypical DMV Cost
Patch chipped edges (2–4 steps)$350 – $800
Resurface a set of steps$600 – $1,400
Demo and replace 3–4 concrete steps$2,800 – $5,500
Add metal handrail$350 – $900

To make repairs last, switch to a concrete-safe de-icer and keep gutters and downspouts from dumping water onto the steps. See our de-icer guide.

RELATED READING

Planning a project? See our Concrete Work service page for scope, process and recent work.

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