Concrete Resurfacing vs. Replacement in Gaithersburg, MD

Concrete resurfacing is usually considered when the existing slab remains stable and structurally suitable but has surface wear, discoloration, minor spalling, or cosmetic deterioration. Replacement is generally more appropriate when the slab has widespread cracking, significant settlement, severe deterioration, or active movement. The right choice depends on whether the slab beneath the surface is still sound — resurfacing renews a stable surface, while replacement rebuilds a slab that can no longer be relied on.

Resurfacing May Make Sense When

• The slab is stable with no ongoing movement
• Damage is mostly surface-level — wear, discoloration, or minor scaling
• Appearance is the main concern
• Minor spalling is present but confined to the surface
• Existing elevations and drainage are acceptable
• The slab has not cracked through or settled unevenly

Replacement May Make Sense When

• The slab is badly broken or cracked through
• Movement is ongoing and the cause has not stopped
• Settlement is severe or uneven
• The base has failed
• The structural condition is poor
• Extensive deterioration runs deeper than the surface

The dividing line is slab stability. A stable, sound slab with a tired surface is a resurfacing candidate; a slab that is moving, cracking through, or no longer providing dependable support is a replacement project. When the cause of the surface damage is still active — drainage, settlement, or freeze-thaw — resurfacing alone rarely holds up for long.

Replacement removes the existing slab and builds a new one in its place. It is the heavier scope, but it is also the option that lets you address the underlying problems — base condition, drainage, elevation, and layout — that resurfacing cannot reach.

Typical Replacement Steps

• Demolition and removal of the existing concrete
• Haul-away and disposal of old material
• Subgrade review and recompaction
• Base preparation and grading
• Forming and layout
• New concrete placement, finishing, and jointing
• Curing before the surface is returned to use

Because replacement rebuilds the slab from the base up, it is the more complete fix when the original concrete has failed. It also gives a chance to correct drainage, slope, or thickness problems the first pour had — which is why it is often the better long-term value when damage is extensive rather than cosmetic.

Replacement starts with demolition. See our concrete demolition and removal page, and for the broader repair context, our concrete repair overview.

The table below compares the two scopes across the factors that usually drive the decision. It is a starting point — the actual recommendation depends on a hands-on assessment of the slab — but it shows how the condition of the concrete maps to the right scope.

Can Cracked Concrete Be Resurfaced?

Only when the cracks are minor, non-structural, and the slab is stable. A surface overlay can bridge hairline or shallow cracks on a sound slab, but it will not hold over a slab that is still moving or cracking through. Widespread or structural cracking points toward repair or replacement, not resurfacing.

Can Sunken Concrete Be Resurfaced?

Not on its own. Resurfacing renews the surface but does not lift a settled slab or change its elevation. If the slab is intact and only settled, concrete leveling may raise it first; if it is cracked through or the base has failed, replacement is usually the better path. Resurfacing over a sunken slab leaves the trip hazard and drainage problem in place.

Can Spalling Concrete Be Resurfaced?

Yes, when the spalling is surface-level and the slab beneath is stable. Resurfacing renews a spalled surface with an overlay or topping. When spalling runs deeper or the slab has cracked through, repair or replacement is more appropriate than resurfacing.

Ask These Questions

• Is the slab stable, or is it still moving?
• Is the damage surface-level, or does it run deeper?
• Are the cracks active, or have they stopped?
• Is there settlement or uneven elevation?
• Are there drainage issues contributing to the wear?
• Is the substrate sound beneath the surface?
• Are the existing elevations and slope acceptable?
• Has the surface been resurfaced before and failed?
• Is a major layout or drainage change planned?

If the answers point to a stable slab with surface-level wear, resurfacing is likely the right path. If they point to movement, settlement, a failed base, or widespread cracking, replacement is usually the more durable long-term value. The checklist is a starting point — a hands-on assessment confirms which scope fits a specific slab.

For the broader repair decision, see our repair vs. replacement guide and our repair cost guide. For the resurfacing service itself, see our concrete resurfacing and overlays page, and for the removal side, our concrete demolition overview.