How to Protect Your Concrete from Road Salt in Western New York
Road salt is the number one enemy of concrete in Buffalo. Every winter, Erie and Niagara County roads get heavy applications of salt and calcium chloride, and every car tracks it onto your driveway and garage floor. Left unprotected, that chloride soaks in and scales the surface apart. Here is how to stop it.
How salt damages concrete
Deicing salt does not dissolve concrete directly. It works by pulling extra water into the surface and increasing the number of freeze-thaw cycles the top layer goes through. Each cycle expands and contracts the surface until it flakes off, called scaling or spalling. Newer concrete and any concrete that was not air-entrained is especially vulnerable.
How to protect your concrete
- Seal it. A penetrating, breathable sealer is the best defense. It blocks chloride while letting the slab release moisture. Reseal exterior concrete every 2 to 3 years in the Buffalo climate.
- Let new concrete cure and age before salt. Avoid deicing salt on concrete during its first full winter. Fresh concrete has not developed full resistance, so use sand for traction that first season.
- Choose a gentler deicer. Calcium magnesium acetate (CMA) is far less aggressive on concrete than rock salt or calcium chloride. Sand adds traction with no chemical attack.
- Rinse in late winter. When a thaw allows, rinse accumulated salt off driveways and garage floors so it is not sitting on the surface.
- Move the salt piles. Do not pile shoveled, salt-laden snow on the middle of the slab where the meltwater pools and refreezes.
What to do if your concrete is already scaling
Light surface scaling can sometimes be cleaned, patched, and sealed to slow it down. Deeper spalling usually means the surface layer is failing and the area needs resurfacing or replacement, ideally with an air-entrained mix and a sealer this time. If you are seeing flaking, popouts, or exposed aggregate on a driveway that used to be smooth, have it looked at before another salt season makes it worse.
Planning a concrete project in the Buffalo area?
Get a free, no-pressure written quote from CIT Concrete, Western New York’s freeze-thaw concrete specialists since 2007.
