Washington County, ME Roof Snow Load - 49 psf
What ASCE 7 says about snow load in Washington County
That's Washington County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from.
Converted to something you can actually eyeball on a roof: about 107.8 in. of fresh powder, 39.2 in. once it settles and packs down, or just 9.8 in. if it's turned to ice. A serious structural load. Homes built before modern snow-load provisions, or with low-slope/flat roof sections, are the ones most worth having checked.
Already snow on the roof in Washington County?
Washington County in numbers
- Design roof snow load49 psf
- Ground snow load, ASCE 7 map70 psf
- National rank#16 of 2,758
- Maine rank#6 of 12
- Population31,383
- Annual snowfall, NOAA normal74.2 in.
- FIPS23029
Where Washington County's figure sits nationally
Out of 2,758 rated US counties, Washington County sits at #16, the top 1% nationally - #6 of 12 within Maine. 47.8 psf is Maine's typical county figure - Washington County beats it by 1.2 psf.
Near 44.967°N 67.6094°W, FIPS 23029: Washington County counts 31,383 residents and a 70 psf map value, which the code's own factors turn into 49 psf.
How much it actually snows in Washington County
Most winters bring Washington County roughly 74.2 in. of snow - NOAA's normal at GRAND LAKE STREAM, ME US, 16.6 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Washington County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.
Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Washington County's county-wide figure. See the methodology guide.