Spalling is the flaking, chipping, or peeling of a concrete surface, where the top layer breaks away and exposes the rougher material beneath. It is unsightly, it spreads, and it is one of the most common problems we are called about. At Decorative Concrete of Austin, the good news is that most spalled surfaces can be restored rather than replaced.
What spalling looks like
Spalling shows up as shallow craters, flaked patches, or a surface that feels rough and crumbly where it was once smooth. It usually starts small, often near edges, joints, or existing cracks, then spreads as water and traffic work at the exposed area. It is a surface failure, distinct from a structural crack running through the slab.
Why concrete spalls
Several causes, often combined. Moisture that gets into the surface and freezes expands and pushes the top layer off, and Central Texas does get freeze events. Deicing salts and chemicals attack the surface. Poor original finishing, such as overworking the surface or adding water during troweling, leaves a weak top layer that fails early. Corroding rebar too close to the surface expands and pops the concrete above it. And ordinary wear plus water exposure eventually breaks down an unsealed slab.
Spalling in Austin specifically
Our climate contributes in its own way. Long, intense heat and UV degrade unsealed surfaces, then occasional hard freezes exploit whatever moisture has gotten in. Add expansive clay soils that move slabs seasonally, and driveways, patios, and pool decks take the brunt of it. Our guide on why concrete cracks covers the related movement issues.
Can spalled concrete be fixed?
In most cases, yes. If the spalling is surface-level and the slab underneath is structurally sound, we grind or prep the surface, address the damaged areas, and apply a bonded overlay or resurfacing system that restores a smooth, finishable surface. That is far less costly and disruptive than replacement, as with how we resurface a cracked patio.
When it cannot
If spalling is deep, widespread, exposes badly corroded rebar, or accompanies structural failure and slab movement, resurfacing over it only buys time. We will tell you that honestly rather than coat a slab that will fail again. Our guide on decorative concrete crack repair covers what is genuinely fixable.
Preventing it from coming back
Sealing is the single best preventive step, since it keeps water out of the surface. Good drainage that moves water away from the slab helps, and avoiding harsh deicing chemicals matters. Our guide on when to reseal concrete floors covers the timing.
Have a spalling surface? Let us look
An in-person assessment tells you whether resurfacing will hold. We serve Austin and surrounding areas, are fully insured, and have completed more than 1,000 projects since 2012. Call (512) 909-5812 for a free on-site estimate.
