ASCE 7 Classification
WIND EXPOSURE IV
Each city figure is its own sourced estimate with its own confidence level; see that city's page for the specific source and caveat.
Sustained high-plains wind, Exposure C across every market, and long response distances: eastern Wyoming demands a different kind of roofing.
Cheyenne
- Elevation
- 6,062 ft
- Avg Wind Speed
- 16.2 mph
- Risk Level
- High
Persistent corridor winds year-round
Casper
- Elevation
- 5,150 ft
- Avg Wind Speed
- 14.8 mph
- Risk Level
- High
Chinook events, sudden gusts to 70+ mph
Gillette
- Elevation
- 4,544 ft
- Avg Wind Speed
- 13.5 mph
- Risk Level
- Elevated
High plains exposure, energy sector facilities
Engineering for Great Plains wind loads
Semi-arid high plains with extreme wind exposure, heavy snowfall, and significant elevation-driven UV intensity
Wyoming's markets all sit at Exposure C with design wind speeds of 105 to 110 mph, and the sustained high-plains wind makes engineered SPF application the most reliable long-term solution.
5 sectors across Wyoming
Wyoming is the windiest of A-1's five states. Roofs here get built to spec.
A-1 Roofing engineers commercial roofing systems for the 105-110 mph design wind speed range across all 5 Wyoming service cities.
41-year commercial roofing and insulation record
What a Wyoming roof is up against
Semi-arid high plains with extreme wind exposure, heavy snowfall, and significant elevation-driven UV intensity. Across the 5 Wyoming cities on this site, the freeze-thaw estimate runs from 75–90 cycles a year, hardest in Cheyenne and lightest in Douglas. Average snowfall spans 16–46 inches, with Casper at the top of the range.
ASCE 7 basic wind speeds run 105–110 mph, peaking at 110 mph around Cheyenne. Cheyenne's combination of sustained high winds, Exposure C terrain, and Hail Alley hail frequency means uplift resistance and impact rated membrane and cover board selection are the two highest priority design decisions. Mechanically attached systems need engineered fastening patterns at corners and perimeters, and hail resistant Class 4 roofing materials are a strong value proposition. Add a roughly 30 psf ground snow load, with drifting against parapets and rooftop equipment in these wind conditions, and frequent freeze-thaw cycling, and flashing, parapet detailing, and drainage capacity become equally important to prevent ice-related membrane fatigue.
The building stock leans toward energy/mining, government/military, agriculture, healthcare and transportation. Each city page below carries its own climate loads, code figures, local building context, and a data-derived FAQ.
| City | Freeze-thaw | Snowfall | Design wind | Lead sector |
|---|---|---|---|---|
| Cheyenne | 90est./yr | 45in | 110mph | government |
| Casper | 85est./yr | 46in | 105mph | energy |
| Gillette | 80est./yr | 35in | 110mph | coal mining |
| Sheridan | 80est./yr | 16in | 105mph | tourism |
| Douglas | 75est./yr | 31in | 109mph | energy |
Freeze-thaw counts are derived estimates. Snowfall is the NOAA 1991-2020 normal for the nearest station. Design wind is the ASCE 7-22 basic wind speed estimate; confirm with the local building department before specifying.
Wyoming roofing facts
- 01Which Wyoming cities does A-1 Roofing serve?
- A-1 Roofing covers commercial roofs across Wyoming, with dedicated local pages for 5 cities: Cheyenne, Casper, Gillette, Sheridan, and Douglas. Buildings outside those cities are served too; the pages exist because each city carries its own climate and code figures.
- 02Does A-1 Roofing have an office in Wyoming?
- No. A-1 Roofing & Insulation Systems is headquartered in Platte, South Dakota, and serves Wyoming as a service-area contractor: crews travel to the job, and a free on-site assessment is scheduled the same way it is for a South Dakota building.
- 03How many freeze-thaw cycles do Wyoming commercial roofs go through?
- Across the 5 Wyoming cities A-1 tracks, the estimate runs from 75 to 90 cycles a year. Wyoming's markets all sit at Exposure C with design wind speeds of 105 to 110 mph, and the sustained high-plains wind makes engineered SPF application the most reliable long-term solution.
- 04How much snow do Wyoming roofs carry?
- Average annual snowfall across those cities ranges from 16 to 46 inches (NOAA 1991-2020 normals), and published ground snow loads run from 25 to 40 psf depending on the county. Drift against parapets and rooftop units, not the season total, is what an assessment checks.
- 05What wind speeds are Wyoming commercial roofs designed for?
- ASCE 7 basic wind speeds for the Wyoming cities on this site run from 105 to 110 mph, with the exposure category set by the terrain around each building. Uplift at edges and corners is the governing detail on a low-slope roof, and both figures should be confirmed with the local building department before a system is specified.
- 06Which roof systems does A-1 install in Wyoming?
- Spray polyurethane foam roofing, silicone and acrylic roof coatings, and in-place restoration of single-ply, metal, built-up, and modified bitumen roofs, plus roof repair and inspection. The climate here (semi-arid high plains with extreme wind exposure, heavy snowfall, and significant elevation-driven UV intensity) favours seamless systems that expand and contract as one surface.
- 07How quickly does A-1 respond to a Wyoming roofing call?
- The target is 24 business hours for a first response anywhere in Wyoming. Active leaks are prioritised ahead of scheduled assessments, and the assessment itself is free.
Commercial roofing services for Wyoming
- Commercial roof restorationRecover the roof you have instead of tearing it off
- Spray polyurethane foam roofingSeamless SPF with a reflective silicone topcoat
- Metal roof coatingSeal seams and fasteners on ribbed and standing-seam metal
- Silicone and acrylic roof coatingsRenewable fluid-applied membranes over sound substrates
- Commercial roof inspectionMoisture surveys and a written condition report
- Commercial roof repairLeak response, contract maintenance, storm damage