Addison County, VT Roof Snow Load - 28 psf

How much snow is too much for a roof in Addison County, VT?

Picture it, not just weigh it: 61.6 in. if it's fresh powder, 22.4 in. once it settles, or a mere 5.6 in. if it's ice. This is a meaningful design load - most modern-code homes handle it fine, though an addition, a carport or a flat-roofed section can be a weak spot.

Addison County, VT: quick facts

• Design roof snow load28 psf
• Ground snow load, ASCE 7 map40 psf
• National rank#241 of 2,758
• Vermont rank#4 of 5
• Population38,047
• Annual snowfall, NOAA normal72.7 in.
• FIPS50001

How Addison County compares

28 psf ranks #241 of 2,758 US counties with a mapped snow load (top 9%) - and #4 of 5 in Vermont. 32.2 psf is Vermont's typical county figure - Addison County comes in 4.2 psf under it.

Population 38,047 (FIPS 50001), roughly 44.0312°N 73.1416°W. The 40 psf ground snow load ASCE 7-22 maps here becomes 28 psf once the code's own design factors are applied.

Typical snowfall in Addison County, VT

NOAA's 30-year normal for Addison County: 72.7 in. of snow a year, from the SALISBURY 2 N, VT US station. (fresh vs. packed vs. ice explains why.)

What this Addison County figure assumes

This is a county-level reference figure for a typical heated home built to Risk Category II (ordinary residential), on a partially exposed lot - the assumptions ASCE 7-22 itself treats as the default case. A steeper roof, a fully exposed hilltop lot, an unheated structure, or a higher risk category all change the actual number.

Addison County's permit office wants an address-specific figure, not this county average - the ASCE 7 Hazard Tool is free, takes under a minute, and outputs a PDF most reviewers accept. Details: the calculation guide.