By Knox Concrete
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March 17, 2022
With cold weather right around the corner, many of your clients will be asking for your advice about the best products to use to melt ice and snow accumulation on their outdoor concrete surfaces. Rock salt (sodium chloride) is often the first deicing agent homeowners turn to because it’s inexpensive and effective. However, it’s very corrosive and can do significant damage to concrete and even pose a threat to pets and plant life. Fortunately, there are many other deicing methods and products that work just as well and won’t ruin your clients’ concrete. Here’s a look at a some of the options. Use Safer Deicing Chemicals Instead of resorting to rock salt, there is a wide array of commercial ice melt products that are less corrosive and safer for the environment, including calcium chloride, magnesium chloride, calcium magnesium acetate, and beet juice salt. Because most deicing chemicals increase freeze-thaw cycling (which can lead to spalling ), they shouldn’t be used on concrete the first winter after it’s placed since it will have less freeze-thaw resistance than mature concrete. Apply an Abrasive Applying an abrasive material, such as sand or natural volcanic granules, to an icy concrete driveway or sidewalk is great for improving traction and making surfaces safer. Although these abrasives won’t actually melt ice or snow, when used in combination with deicing chemicals they will reduce the amount of deicer needed and lessen its negative impact. A textured finish, such as a broom finish , can also help to improve traction. Install a Heated Driveway Before installing a new concrete driveway or sidewalk, consider investing in an in-slab electric or hydronic heating system , which can eliminate the buildup of ice and snow and the need for deicing chemicals. These heating systems are quite expensive to install, but a good low-cost alternative is to lay down snow-melting mats that plug into a standard 120-volt outlet. Seal Against Moisture and Salt In areas with severe winters, it’s wise to seal exterior concrete against moisture and salt intrusion as extra insurance against corrosion and freeze-thaw damage. For maximum protection, use a penetrating sealer designed to limit the intrusion of moisture and chlorides into the pores of the concrete. Learn more about the best sealers for concrete driveways .