While it’s important to de-ice doorsteps, balconies, driveways, and concrete sidewalks in winter to prevent falls, using de-icing salt is best avoided—especially on newer concrete surfaces—as it can cause premature deterioration. Additionally, most de-icing salts, even those marketed as “eco-friendly,” have negative environmental impacts.
Use Abrasives Instead of De-Icing Salt
Sand and small gravel are economical, less harmful to the environment, and improve traction on icy surfaces.
Though messier and requiring cleanup in the spring, these anti-slip products act instantly and don’t corrode concrete or damage the environment.
You can find them at most hardware stores or large retailers.
Why is Salt Especially Harmful to New Concrete?
Salt is less damaging to older concrete, but young concrete (less than 2 years old) still contains free lime, which reacts poorly with the chlorides in de-icing salts.
Additionally, meltwater seeps into the pores of the concrete, and when it re-freezes, the pressure causes flaking and scaling of the surface.
If Salt is Necessary
If you must use de-icing salt, do so sparingly and only on older concrete, and consider sealing the concrete in warmer months to limit salt damage.
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