Roscommon County, MI Roof Snow Load - 35 psf
Roscommon County, MI: your roof's ASCE 7 snow number, in plain English
Roscommon County's roofs are built to hold 35 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 77 inches of fresh, light snow, 28 inches of old, settled snow, or as little as 7 inches of solid ice - snow that heavy is rare here but ice from a freeze-thaw cycle adds up far faster than the depth suggests. This is a serious structural load - older homes built before modern snow-load provisions, or ones with low-slope or flat roof sections, are worth having checked.
Roscommon County in numbers
- Design roof snow load35 psf
- Ground snow load, ASCE 7 map50 psf
- National rank#152 of 2,758
- Michigan rank#24 of 70
- Population23,932
- Annual snowfall, NOAA normal74.7 in.
- FIPS26143
Roscommon County by the numbers
Nationally that's #152 out of 2,758 rated counties, the top 6%; within Michigan alone, Roscommon County ranks #24 of 70. That's 3.3 psf above Michigan's own county-average design load of 31.7 psf.
Roscommon County, FIPS 26143, is home to 23,932 people near 44.3395°N 84.6113°W. Its 50 psf ground snow load figure is the map value; 35 psf is what a roof is actually designed for.
Roscommon County's snowfall, most winters
74.7 in. a year: that's Roscommon County's NOAA 1991-2020 snowfall normal, measured at HOUGHTON LAKE 2NW, MI US (8.3 mi away). See the density guide.
Before you rely on Roscommon County's number
Treat the Roscommon County figure as a starting point, not a final answer: it assumes standard occupancy, a heated structure and a moderately sheltered site, per ASCE 7-22's own defaults. Exposed terrain, an unheated building or a steeper roof all shift the real number.
For a real application, skip the county number and go straight to the ASCE 7 Hazard Tool - enter your coordinates and it returns a site-specific figure a plan reviewer will recognize. Details: the calculation guide.