A cracked driveway or patio is one of the most common concrete problems Denver homeowners run into — and one of the most confusing when it comes to deciding whether to fix it yourself or call a professional. Not all cracks are the same, and knowing the difference can save you money or prevent a much bigger repair down the road. After repairing cracked concrete across the Denver metro for over 30 years, CC Concrete LLC breaks down when a DIY fix is fine and when it's time to bring in a pro.
Not sure if your crack needs a professional? Request a free on-site estimate from CC Concrete LLC →
Why concrete cracks in the first place
Concrete is a rigid material, and small amounts of movement in the ground beneath it can cause cracking over time. Common causes in Denver include:
- Freeze-thaw cycling: Water seeps into tiny pores, freezes, expands, and gradually widens cracks over Colorado's 160+ annual freeze-thaw cycles.
- Expansive clay soils: Denver's clay-heavy soil shrinks and swells with moisture changes, shifting the slab above it.
- Shrinkage during curing: Concrete naturally shrinks slightly as it cures, which can create hairline cracks even in a well-poured slab.
- Heavy loads: Vehicles, equipment, or heavy furniture placed on concrete not designed for that weight can stress the slab.
When a DIY crack repair is fine
Not every crack requires a professional. DIY repair is generally a reasonable option when:
- The crack is a hairline crack under about 1/8 inch wide
- It hasn't widened or shifted over multiple seasons
- There's no visible unevenness on either side of the crack
- It's purely cosmetic and not near a structural area like a foundation or load-bearing slab
A concrete crack filler or polyurethane sealant from a hardware store, applied with a caulking gun, can seal minor cracks and prevent water infiltration — buying you time before a bigger repair is needed.
When you need a professional
Some cracks signal a bigger problem underneath, and a DIY sealant won't fix that. Call a professional if you notice:
- Cracks wider than 1/4 inch: These often indicate structural movement, not just surface shrinkage.
- Uneven edges on either side of the crack: This points to settling underneath, which a surface filler can't address.
- Cracks that keep growing: If a crack has visibly widened over a season or two, the underlying cause needs attention.
- Multiple cracks radiating from one point: This pattern usually indicates a structural or sub-base issue.
For a broader look at when repair isn't enough, see our guide on 5 signs your concrete needs replacement.
Why professional repair holds up longer
Store-bought crack fillers are designed for cosmetic, surface-level cracks — not for repairs that need to hold up through another 160+ freeze-thaw cycles a year. Professional repair typically includes:
- Proper cleaning and preparation of the crack before sealing
- Industrial-grade bonding agents matched to the crack size and depth
- An assessment of whether the underlying soil or sub-base needs to be addressed
- A finish that blends with the surrounding concrete instead of leaving a visible patch
Frequently asked questions about crack repair in Denver
How much does professional crack repair cost?
Most professional crack repairs range from $200 to $600 depending on the length, depth, and whether the underlying cause also needs to be addressed.
Can a crack get worse if I ignore it?
Yes. Water infiltration through even a small crack can accelerate freeze-thaw damage each winter, turning a minor cosmetic issue into a much larger repair.
Do all cracks mean my concrete needs replacement?
No. Many cracks are cosmetic and can be repaired without replacing the entire slab. Replacement is generally only necessary when the damage is widespread or structural.
How long does professional crack repair take?
Most crack repairs are completed in a single visit, often within a few hours, with the surface ready for normal use shortly after.
Get a free crack repair estimate in Denver
CC Concrete LLC has repaired cracked driveways, patios, and walkways across Denver, Thornton, Erie, Brighton, Broomfield, Westminster, Arvada, and surrounding communities for over 30 years. Every project starts with an honest on-site assessment to determine whether your crack needs a simple repair or points to a bigger issue. Seniors and military members receive a 10% discount on all projects.
- Licensed and insured — serving Denver metro since 1994
- 500+ residential and commercial concrete projects completed
- Honest repair recommendations, no upselling
- Air-entrained concrete mix for Denver's freeze-thaw conditions
- Most crack repairs completed in a single visit
Knowing when to call a pro
A hairline cosmetic crack is often a fine DIY fix, but wider cracks, uneven edges, or repeated cracking usually point to something happening underneath the slab that a store-bought filler can't solve. CC Concrete LLC gives you a straightforward, honest assessment so you know exactly what your concrete needs. Schedule your free on-site estimate today →
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