Environmental Summary46.283°N · 96.078°W

Fergus Falls, Minnesota commercial roofing almanac

A roofing almanac for one commercial territory: the loads a roof carries here, the systems built to answer them, and the local record worth keeping on file.

The Climate Record

Cold continental with 130 freeze-thaw cycles in the Otter Tail Lakes region of west-central Minnesota.

Across a normal year the roof surface works through about 130 freeze-thaw cycles, each one prying at seams and fasteners as trapped moisture expands and releases. Winter delivers roughly 48 inches of snow on average, a standing load that meltwater can drive under any lap that has started to open.

Summers reverse the stress, pushing membrane temperatures toward 81°F and accelerating the aging of exposed coatings. Structures here are engineered to wind Zone this, so edge detailing and uplift resistance are not afterthoughts. Read together, these numbers argue for monolithic, reflective systems that move as one surface and shed both snow and heat, which is the case for spray foam under silicone.

A regional hospital, regional retail, agricultural processing, and government service buildings in the Otter Tail Lakes region of west-central Minnesota.

Otter Tail County carries a FEMA National Risk Index rating of Relatively Low, in the 79th percentile nationally, with a tornado hazard percentile of 84.2, and by raw historical count it is the single most tornado-prone county in Minnesota, with 85 recorded tornadoes, one of the top three counties statewide for total tornado activity.

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Data Table · MN
Freeze-thaw
130est. / yr
Snowfall (avg)
48in
Avg July high
81°F
Design wind
100 mph
Response
24 business hours
Latitude
46.283°N
Longitude
96.078°W
Frost-free
157days
Last frost
May 1
First frost
Oct 5
Avg wind
11.2mph
Avg humidity
67.5%

Precipitation (26.9 in) uses the NOAA 1991-2020 figure though usclimatedata.com reports a notably lower secondary estimate (23.42 in); frost dates also have a wider modeled percentile band (Apr 9 to May 1 spring, Oct 5 to Oct 24 fall) beyond the single estimate used here, and the wind speed figure is a monthly-range midpoint (9.6 to 12.8 mph).

Structural Notes
Ground snow load
60psf

MN DLI Rule 1303.1700 (named northern high-load county)

Design wind, Exposure B
100mph

ASCE 7-22 / MSBC northern regional band estimate, verify with ASCE 7 Hazard Tool

Fergus Falls combines a 60 psf northern-county snow load with the state's highest historical tornado count by raw frequency, an unusual pairing that argues for both drift-load-rated structural detailing and wind and impact-resistant roofing assemblies, rather than optimizing for one hazard at the expense of the other. Verify current values with the local building department before specifying a system.

Sectors On Record
  • agriculture
  • healthcare
  • retail
  • manufacturing
  • government
Field Notes
  1. 01

    Fergus Falls is near the edge of A-1's Minnesota territory, with response routed from either Moorhead or the Minneapolis service corridor depending on the project scope

  2. 02

    130 freeze-thaw cycles per year at this latitude create accelerated cumulative stress on any roofing system seam or penetration, making seamless SPF a strong long-term solution

  3. 03

    The regional healthcare system's campus is the dominant commercial employer, with institutional buildings that require both proactive roof maintenance programs and documented inspection schedules

Local Commercial EntryFergus Falls, MN

Fergus Falls's commercial roofing base is concentrated in a compact downtown along the Otter Tail River and an Interstate 94 and Highway 210 interchange industrial zone near the municipal airport, a smaller regional-hub footprint serving west-central Minnesota and the Otter Tail County seat.

Business parks: Airport-adjacent industrial land near Fergus Falls Municipal Airport, roughly three miles from the city's central business district

Corridors: Interstate 94, about one mile east of the municipal airport via Highway 210; The historic downtown commercial corridor along the Otter Tail River

Districts: Downtown Fergus Falls central business district; The Interstate 94 interchange commercial area

Close of Record46.283°N · 96.078°W

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Every entry in this almanac started as an on-site read. A free assessment logs the state of your deck, coatings, and seams against the Fergus Falls climate, then sets the maintenance calendar that keeps it watertight.

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Local roofing reference

Fergus Falls roofing facts

01How many freeze-thaw cycles does Fergus Falls see each year?
Fergus Falls, MN sees about 130 freeze-thaw cycles per year, one of the key stresses on a commercial roof membrane in this climate.
02What wind speed should a roof in Fergus Falls be designed for?
ASCE 7 sets a basic wind speed and an Exposure Category rather than a "zone". For Fergus Falls the governing figures are a 100 mph basic wind speed at Exposure B. Confirm both with the local building department before a system is specified.
03How much snow does Fergus Falls get?
Fergus Falls averages about 48 inches of snow per year.
04How fast can A-1 respond to a roofing issue in Fergus Falls?
A-1 Roofing's typical response time in Fergus Falls is 24 business hours.
05What ground snow load and wind speed should a roof in Fergus Falls be designed for?
Roofs here are commonly built to a ground snow load of 60 psf (MN DLI Rule 1303.1700 (named northern high-load county)) and a design wind speed of 100 mph, Exposure B (ASCE 7-22 / MSBC northern regional band estimate, verify with ASCE 7 Hazard Tool). Confirm current figures with the local building department before a system is specified.
06How long is the roofing season in Fergus Falls?
Fergus Falls averages 157 freeze-free days a year, from a last spring frost around May 1 to a first fall frost around Oct 5. That is the practical window for work that depends on coating and adhesive cure times.
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