Most lots get more salt than they need. Rate tables give you a starting point by pavement temperature, trend and weather. Calibrate your spreaders, start there, and adjust down as you learn your sites.1
Granular rates, lb per 1,000 sq ft
| Pavement temp & trend | Weather | Pre-wet / pretreated with brine | Pretreated with other blends | Dry salt | Sand |
|---|---|---|---|---|---|
| >30°F ↑ | Snow | 0.75 | 0.5 | 0.75 | — |
| >30°F ↑ | Freezing rain | 1.25 | 1.0 | 1.5 | — |
| 30°F ↓ | Snow | 1.25 | 1.0 | 1.5 | — |
| 30°F ↓ | Freezing rain | 1.5 | 1.25 | 1.75 | — |
| 25–30°F ↑ | Snow | 1.25 | 1.0 | 1.5 | — |
| 25–30°F ↓ | Freezing rain | 1.75 | 1.5 | 2.25 | 3.25 |
| 20–25°F ↑ | Snow or freezing rain | 1.75 | 1.5 | 2.25 | 3.25 (frz. rain) |
| 20–25°F ↓ | Snow | 2.0 | 2.0 | 2.75 | — |
| 20–25°F ↓ | Freezing rain | 2.5 | 2.0 | 3.0 | 3.25 |
| 15–20°F ↑ | Snow | 2.0 | 2.0 | 2.75 | — |
| 15–20°F ↓ | Snow or freezing rain | 2.5 | 2.0 | 3.0 | 3.25 (frz. rain) |
| 0–15°F | Snow | Not recommended | 3.0 | Not recommended | 5.0 spot |
| Below 0°F | Snow | Not recommended | 4.5 | Not recommended | 5.0 spot |
From the MPCA parking lot and sidewalk guidance, which is based on road guidelines in the Minnesota Snow and Ice Control Handbook. "Pre-wetted / pretreated" means salt wetted with brine (or with other blends) before it hits the pavement. Treat these as targets to work toward, not minimums.1
Do the math for a site
Total material = rate × area ÷ 1,000. A 54,000 sq ft lot at 2.0 lb per 1,000 sq ft takes about 108 lb per application.1 Handy conversions: a lane-mile (12 ft × 5,280 ft) is 63,360 sq ft, an acre is 43,560 sq ft, a parking stall is about 180–200 sq ft, and a cubic yard of salt weighs about 1.1 tons.2
How much salt do I need?
Rates from the MPCA table above. Applications per season varies a lot with the winter and your contract triggers; use your own history if you have it. This is a planning estimate, not a guarantee.
Quote me this tonnageCalibrate or it's all guessing
A rate table is only as good as your spreader setting. Calibrate every spreader at least once a season, and again when a new load of material arrives, since gradation varies.3 The basic method: run the spreader for a set time or distance over a tarp (or catch the output in a bucket), weigh it, and work out pounds per 1,000 sq ft at each gate or auger setting. Tape the chart inside the cab.
Next in the guideAnti-icing, brine and pre-wetting →