13 Oct De-Icing Options for Long Island Commercial Properties: Rock Salt, Brine, and Alternatives
For most commercial properties on Long Island, the right de-icing plan uses the least material needed to keep walkways and lots safe, applies it at the right time, and is approved by the property in advance. Rock salt is the common default and works down to about 15 degrees Fahrenheit pavement temperature, but timing, product choice, and placement matter as much as the product itself. And because Long Island relies on a sole-source aquifer for its drinking water, there are good reasons not to over apply.
Plowing Clears Snow. De-Icing Manages Ice.
Plowing removes snow, but it leaves a thin layer that can bond to pavement and refreeze overnight. De-icing and anti-icing treatments are what prevent that bond or break it. On a commercial property, that mostly means walkways, entrances, and the places where meltwater collects. At McCormack Irrigation, de-icing is part of our commercial snow removal service and is applied as needed with your prior approval, which is why it helps to understand your options before the season starts.
Common De-Icing Materials
Every product has a working range, and the right choice depends on pavement temperature, the surface, and what is growing nearby. The overview below follows guidance from the University of Minnesota’s SmartWinterSalt program, the Minnesota Pollution Control Agency, and UNH Cooperative Extension.
| Material | Works best for | Watch for |
| Rock salt (sodium chloride) | General use on lots and walkways at moderate temperatures, effective down to about 15 degrees F pavement temperature | Slows as it gets colder, and its high salt load can burn plant foliage and inhibit rooting near turf and plantings |
| Liquid brine | Anti-icing before a storm, to keep ice from bonding to pavement | Has to go down before precipitation to work as an anti-icer |
| Calcium chloride and magnesium chloride | Colder conditions, since they stay effective at lower temperatures and start working faster than rock salt | Still chloride based, though magnesium chloride is considered gentler on grass |
| Acetates and other non-chloride products | Places where avoiding chloride is a priority, such as some parking ramps | Performance varies by product. Calcium magnesium acetate, for example, works best at warmer temperatures |
| Sand and other abrasives | Traction when it is too cold for salt to work | Provide traction only, and do not melt ice |
Timing Matters as Much as the Product
Pavement temperature, not air temperature, decides whether a product can work, which is why a lot can stay icy on a day that feels mild. Treating before a storm can keep ice from bonding in the first place, and clearing as much snow and ice as possible before applying product avoids wasting material.
Refreeze is the repeat offender. Meltwater from piles runs across cleared pavement and freezes again after dark, which is why follow up applications matter, particularly in coastal communities such as Long Beach and Glen Cove, where rapid overnight refreezing is common.
Where to Apply, and Where Not To
Put product where people walk and drive: walkways, entrances, ramps and accessible routes, and the lanes that carry the most traffic. Keep it off planted beds and turf edges where you can. UNH Cooperative Extension notes that rock salt’s high salt index can burn plant foliage and inhibit rooting, while magnesium chloride has less impact on grass. Where meltwater drains matters too, so the site walk should include low spots and storm drains.
Why Restraint Pays on Long Island
Long Island relies on a sole-source aquifer for its drinking water, which makes it worth thinking about what ends up in the ground. A USGS study of northern U.S. streams found that chloride from winter deicing infiltrates groundwater and is released slowly to streams throughout the year, and its authors call for deicer management that minimizes salt use while still keeping conditions safe. That study was not limited to Long Island, but the lesson applies here: more is not better.
What to Put in Writing With Your Snow Contractor
- Which de-icing products may be used, and who approves a change
- Which areas get treated and which are off limits, such as planted beds and turf edges
- Whether pre-storm treatment is part of the plan or only applications after the storm
- How follow up visits are handled when meltwater refreezes
- How and when you will be told what was applied
- Where cleared snow will be stored so meltwater does not run back across walkways
These items belong alongside the contract structure, scope, and response terms covered in our guide to what to lock in before the first storm.
When to Call McCormack Irrigation
McCormack Irrigation provides snow plowing and de-icing for apartment complexes, shopping centers, and industrial complexes throughout Suffolk and Nassau County, with seasonal contracts for properties that need dependable coverage all winter. De-icing is applied as needed and with your approval, and we walk each contracted property before winter to map plowing routes, priority areas, and where de-icing applies. Our crews are our own, never subcontractors, and our work is backed by an A+ rating with the Better Business Bureau and a 4.9 out of 5 rating across more than 330 Google reviews. Call (631) 744-1500 or contact us online to talk through a plan before the first storm.