How Fishers Homeowners Can Protect Concrete from Indiana’s Winter
If you live in Fishers, or anywhere in Hamilton County, your concrete takes a beating every winter. It’s not just the cold—it’s what happens when temperatures bounce above and below freezing, sometimes in the same day.
Here’s what’s actually going on, and what you can do about it.
Why Indiana Winters Are Hard on Concrete
The Indiana State Climate Office at Purdue University tracks freeze-thaw events in Indianapolis. A freeze-thaw cycle happens when temperatures drop below 32°F, then rise back above it—and that temperature swing is what damages concrete.
Here’s the science: concrete is porous. When water gets into those pores and freezes, it expands by about 9%. That expansion creates internal pressure. When it thaws, more water can get in. Repeat that cycle dozens of times over a winter, and you get cracking, spalling (surface flaking), and scaling.
According to research from Purdue’s Joint Transportation Research Program, freeze-thaw damage is “one of the major durability concerns for concrete structures in cold climates.” The damage compounds over time—each cycle makes the next one worse.
What Happens When Salt Gets Involved
The City of Fishers uses granular salt, sand, and liquid brine on public roads during snow events. That’s straight from the Fishers Snow and Ice Control Plan, updated August 2025.
This matters for your driveway because:
- Salt runoff from the street can reach your driveway apron — especially if snow gets plowed onto the edge of your property
- Salt tracked in on car tires — vehicles that have been on treated roads bring salt home with them
The Purdue JTRP research found that chloride-based deicing salts “attack the concrete itself, through reactions and phase changes, producing dimensional changes and cracking of the concrete.” The study noted that of the common deicing salts, sodium chloride (regular rock salt) appears more benign than calcium chloride or magnesium chloride when it comes to chemical reactions with concrete.
The University of Nebraska Extension confirms this: “Some deicing chemicals are more damaging to concrete surfaces than others. Products such as ammonium nitrate or ammonium sulfate tend to damage concrete more than sodium chloride or calcium chloride.”
The First-Winter Rule
If you had concrete poured this year, this is critical: avoid using any deicing chemicals on new concrete during its first winter.
Why? New concrete needs time to fully cure and develop strength. The pores are still relatively open, and the material is more susceptible to freeze-thaw damage. The University of Nebraska Extension recommends: “New concrete should be air dried for at least 30 days prior to the first freeze. Sealers may be applied to prevent the concrete from absorbing water and salts.”
What to use instead of salt:
- Sand — provides traction without chemical interaction
- Prompt snow removal — shovel or blow snow before it compacts into ice
- Sunlight — on clear days, even cold sunshine can help melt thin ice layers
What Actually Protects Concrete
1. Higher-Strength Concrete (At Installation)
Stronger concrete holds up better to freeze-thaw cycles. We pour at 3500 PSI, which is higher than many competitors. Higher strength means better resistance to the internal pressure that builds up when water freezes inside the concrete.
2. Proper Curing
Concrete gains strength over time through a chemical process called hydration. Rushing this process—or exposing new concrete to harsh conditions too soon—can compromise long-term durability. That’s why the first-winter rule matters so much.
3. Sealing
A penetrating sealer can help reduce water absorption. The University of Nebraska Extension notes that “sealers may be applied to prevent the concrete from absorbing water and salts.”
Key timing considerations:
- Temperature matters — most sealers need ambient and surface temperatures above 50°F to cure properly
- In the Midwest, spring and fall are typically the best seasons for sealing
- Concrete should be clean and dry before application
If you’re sealing before winter, you’ll want to do it on a dry day when temperatures will stay above 50°F for at least 24 hours after application.
4. Smart Deicer Choices (After Year One)
If you need to use a deicer on mature, sealed concrete:
- Sodium chloride (rock salt) is generally less aggressive to concrete than calcium chloride or magnesium chloride, according to the Purdue JTRP research
- Use the minimum amount needed — more salt doesn’t mean faster melting
- Shovel first, then apply sparingly — deicers work best to break the bond between ice and concrete, not to melt large accumulations
- Sweep up excess after the ice has cleared to minimize prolonged exposure
The Iowa State Extension recommends: “Use deicing salts at rates sufficient to loosen ice and snow from driveways and sidewalks, then remove the loosened ice and snow with a shovel.”
A Note About What You Can’t Control
Even if you never put salt on your own driveway, it can still be affected by:
- Street salt runoff reaching your driveway apron
- Salt spray from passing vehicles
- Salt tracked in on your own car tires
According to the Fishers Snow and Ice Control Plan, the city applies granular salt on primary and secondary roads during snow events. That’s just reality in central Indiana—and one reason why sealing and choosing a quality concrete mix at installation matters.
The Bottom Line
Indiana winters are genuinely tough on concrete. But the damage isn’t inevitable. The fundamentals:
- New concrete? Skip the deicers entirely for the first winter. Use sand for traction.
- Existing concrete? Seal it (spring or fall, above 50°F), use rock salt sparingly, and shovel promptly.
- Getting new concrete poured? Ask about PSI strength—higher is better for freeze-thaw resistance.
These aren’t dramatic secrets—they’re just the basics that actually work.
Silvers Concrete and Paving – Fishers serves Fishers and surrounding cities like Fortville, Pendleton, and McCordsville. Questions about your concrete? Let us help! Or get an instant quote using our concrete calculator.
