The pillar guide

Metal roofing in Wyoming: wind, rules, and real numbers

A metal roof earns its keep in Wyoming the way it does almost nowhere else, and the reason is wind. From Cheyenne's I-80 corridor to the ridgelines above Casper, the load that decides whether a roof stays on is uplift, and metal systems are the ones engineered against it with tested, published ratings. This guide gathers everything a Wyoming homeowner needs in one place: the measured wind, the design values your county actually publishes, how a metal assembly resists uplift, what the state does and does not regulate, what cities license roofers, and the cost figures that have real sources behind them.

Skip ahead if you want: the wind, county design values, how metal resists uplift, the rules, verifying a roofer, costs, Jackson.

The wind, measured, not folklore

The wind here is documented, and the primary source is the Wyoming Climate Atlas published by the State Climate Office through the University of Wyoming's Water Resources Data System. Per the Climate Atlas wind chapter, Wyoming ranks first in the US in annual average wind speed at 12.9 mph, winter brings frequent periods of 30 to 40 mph wind with gusts of 50 to 60 mph, and the windiest locations in the state include Rawlins, Laramie, Cheyenne, and Casper. The same source names Lander and Sheridan as the calmest of the reporting stations, which is worth knowing if you are pricing a roof in Sheridan: calmer is relative in Wyoming, not calm.

The National Weather Service treats southeast Wyoming wind as its own forecast problem. The NWS Cheyenne high-wind page maps the wind-prone areas: the South Laramie Range and the I-80 Summit between Cheyenne and Laramie, the Bordeaux stretch of I-25 between Chugwater and Wheatland, the Laramie Valley, and central Laramie County. The office notes its high-wind guidance is built on local research published in a peer-reviewed American Meteorological Society journal. If your house sits in one of those corridors, the fastening details below are not optional reading.

What does that do to a roof? Wind accelerating over a ridge or an eave creates negative pressure, suction that tries to peel the roof covering upward, hardest at corners, rakes, and edges. Asphalt shingles resist it with adhesive strips and nails through a thin mat. A metal roof resists it with a continuous interlocked panel system fastened to the structure, which is why metal is the material this state's conditions keep pointing at. The system only works, though, if it is specified against the right number, and that number varies by county.

Design wind values, county by county

Wyoming has no mandatory statewide building code; code adoption runs city by city and county by county, a status tracked on the International Code Council's Wyoming adoption page. Design wind speeds and snow loads are therefore set locally by each city or county building office. Three published examples bracket the state:

Two things to take from the table. First, the numbers are local: a roof detailed for Casper's published values is not automatically detailed for Cheyenne's, and neither touches Teton County's snow load, which runs four to nearly six times the 30 psf the plains jurisdictions publish. Second, the number your bid should reference is your building office's, so the city pages here (Casper, Cheyenne, Laramie, Gillette, Sheridan, Jackson) each name the office that holds it.

How a metal roof resists uplift

Three details carry the uplift load on any metal roof, and they are the spine of every service page on this site. The panel profile decides how panels join: standing seam panels interlock along raised vertical seams with the fasteners concealed beneath, while exposed fastener panels overlap and screw straight through the face. The clip and fastener system decides how the panel grips the structure: concealed clips let standing seam panels float with thermal movement while staying anchored. And the fastening pattern decides where the grip concentrates: spacing tightens at eaves, ridges, and corners because that is where suction peaks. The deep dives are on standing seam metal roofing and wind-rated roof systems.

Uplift resistance is not a matter of opinion, because it is tested. Per Sheffield Metals' learning center (manufacturer-published), UL 580 tests complete roof assemblies in classes 30, 60, and 90, with Class 90 the highest and the test run in 120-minute phases; UL 1897 continues the UL 580 procedure to failure; and ASTM E1592 applies uniform static pressure to standing seam systems. Sheffield states UL 90 is its minimum standard for installed systems. MBCI's overview of standing seam uplift testing (also manufacturer-published) covers the ASTM E1592 side. The practical use of all this: ask any bidder which tested assembly they are quoting and how it maps to the county design value above. A roofer fluent in that question is a different animal from one who answers in colors and warranties.

The standing seam versus exposed fastener choice runs through the same lens. Exposed fastener panels cost less and go on faster, but they rely on hundreds of gasketed screws whose washers age in sun and cold while wind works the panels. Standing seam concentrates the engineering in the seam and clip, which is why it is the common answer on open, hard-blown Wyoming sites. Neither is wrong everywhere; the exposure decides. Metal roof installation walks the whole build sequence, and metal roof repair covers what failure looks like when the details were wrong.

The rules: one statute, no license

Here is the fact this whole site is built around: Wyoming has no statewide license or registration for roofers, or for general contractors. No Wyoming statute creates one. The only construction trade licensed statewide is electrical, through the Wyoming State Fire Marshal's Electrical Safety division, which runs statewide electrician licensing with master and journeyman exams. Roofing gets nothing like that. Industry licensing guides state it flatly; see Procore's Wyoming licensing overview and Harbor Compliance's Wyoming page.

The one statewide law aimed at roof work is consumer-contract protection, not licensing: Wyo. Stat. 40-12-701 through 40-12-706, the Exterior Storm Damage Repair Contracts act, enacted as 2017 Senate File 0127 and effective July 1, 2017. It requires written disclosures in storm damage repair contracts, gives the homeowner a right to cancel within three business days of signing, or within three business days after the insurer denies the claim in whole or in part, and bars the contractor from paying or rebating any portion of an insurance deductible or acting as an insurance adjuster or consultant on the claim.

Read that statute for what it is: real protection you already have after a hailstorm, and proof of the gap. It creates no license, no exam, and no competency check. If a door-knocker offers to "cover your deductible" after a storm, the offer itself is illegal under 40-12-702, which is the fastest character test Wyoming law hands you.

Licensing, where it exists at all, is city by city. Six programs cover the state's larger towns:

Outside those six programs, a Wyoming homeowner has no license to check. Not a weaker one. None.

The check that replaces the license

This checklist applies to any roofer you talk to, including one we match you with. We are a free matching service, not a contractor, and the referral fee that funds this site comes from the professional, never from you; how we make money lays it out, and about us covers the sourcing rules this guide is written under.

What it costs, with sources attached

A metal roof is a five-figure project on most Wyoming homes, standing seam above exposed fastener. Every figure below is a published number from the contractor or manufacturer named, cited to the page that carries it. None is a statewide average, and your roof's size, pitch, and access will move any of them.

The pattern across sources: standing seam runs roughly three to four times an entry asphalt roof up front, and exposed fastener metal lands between them. The case for paying it in Wyoming is the wind math above; a system that stays sealed through a couple of decades of 50 mph gust events is buying out future tear-offs. If the roof leans the other way, toward replacing failing metal or extending what is up there, start with metal roof replacement or metal roof repair.

Jackson is a different project

Everything above holds in Teton County, and then the numbers change category. Per the county design criteria, ground snow load runs 120 psf to 175 psf depending on GIS zone, against roughly 30 psf on the plains, with 115 mph wind, Seismic Design Category D, and a 34 inch frost depth. A Jackson roof is engineered for snow retention, ice, and structure first, with the wind detailing layered on top, and the architectural standing seam that dominates the valley is as much a structural answer as an aesthetic one. Contractor licensing there runs through the Town of Jackson and covers unincorporated Teton County too. The Jackson page treats that market on its own terms, because it is not another plains town with a nicer view.

Where this leaves you

The short version of 2,000 words: get the county design value from your building office, insist on a tested assembly rating that meets it, weigh standing seam against exposed fastener by exposure rather than by price alone, and run the four-step verification because no state license will run it for you. The service pages go deeper on each system, and the city pages carry the local offices and rules.

When you want bids from an independent local metal roofer, the match is free and the decision stays yours.