Standards worldwide, compared with U.S. storm codes; focus on the Alabama and Mississippi Gulf Coast
Roofing standards around the world, measured against the Gulf Coast
Wind and hail rules for roofs change from one continent to the next: what the wind is measured as, how rare a storm the design has to survive, and who draws the map. This National Roofing Directory publication compares those rules from their official texts, then uses the Alabama and Mississippi coast, where Ivan, Katrina, Sally and Zeta all left their mark, as the test case.
Why the Gulf Coast makes a good test
This stretch of coast has seen both extremes of hurricane damage. Katrina's surge reached an estimated 24 to 28 ft along a swath of the Mississippi coast about 20 miles wide, while Sally in 2020 was a slow storm that came ashore at Gulf Shores at 95 kt and dropped nearly 30 inches of rain on Orange Beach.
Sally also produced something rare: data. The Alabama Department of Insurance says it was the nation's first hurricane to strike an area with a large sample of FORTIFIED homes, and the University of Alabama study it commissioned found FORTIFIED construction cut loss frequency by at least 55 percent and as much as 74 percent. That matters because IBHS studies show as much as 90 percent of catastrophe-related insurance claims involve roof damage.
Four ways to write down a wind
The standards comparison goes into detail; here is the short version.
- Europe. Eurocode wind starts from a 10-minute mean speed with a 50-year return period, and each country publishes its own values in a National Annex.
- Australia. The National Construction Code designs houses for a wind with a 1-in-500 annual chance of being exceeded, and sorts sites into non-cyclonic N classes and cyclonic C classes.
- Canada. The National Building Code builds its wind pressures from hourly wind speeds at 10- and 50-year return periods.
- United States. ASCE 7 maps a 3-second gust, at a 700-year return period for Risk Category II buildings.
Because the systems average the wind over different periods and aim at different return periods, their raw numbers cannot be swapped. A European 10-minute mean and an American 3-second gust describe different slices of the same storm.
Above the code: FORTIFIED on the Gulf Coast
Alabama and Mississippi both use a voluntary standard to push roofs beyond the minimum code. IBHS's FORTIFIED program strengthens roof edges, seals the roof deck and uses ring-shank nails in an enhanced pattern, and a FORTIFIED Roof is required at every level of the program.
Alabama went furthest. Its Department of Insurance says the state has more than 51,000 FORTIFIED homes, most of them in Baldwin and Mobile counties, and its Strengthen Alabama Homes program offers grants of up to $10,000 toward a FORTIFIED Roof. Mississippi started its own grant in 2026: the Insurance Department says the first round offers up to $10,000 to wind pool policyholders, with a statewide rollout anticipated in early 2027. For the basics, read the directory's FORTIFIED roof explainer or the IBHS FORTIFIED listing on the National Roofing Directory.
Hail is part of the test, too
NOAA's Storm Events Database records 1,038 hail events of 1 inch or larger in Alabama and 1,148 in Mississippi from 2016 through 2025. On the coast, Baldwin County logged 36 such events and Mobile County 26 over the same years, and on April 10, 2021 the database logged hail 4 inches across in Orange Beach. Wind codes do not cover that; product impact ratings do, which the guide explains.
Landfalls on this coast
| Year | Storm | Landfall, per NHC | Intensity |
|---|---|---|---|
| 2004 | Ivan | Alabama coast, just west of Gulf Shores | 105 kt, category 3 |
| 2005 | Katrina | Near the mouth of the Pearl River, Louisiana-Mississippi border | 105 kt |
| 2017 | Nate | Near Biloxi, Mississippi | 65 kt |
| 2018 | Gordon | Between the Alabama-Mississippi border and Pascagoula | 60 kt, tropical storm |
| 2020 | Sally | Gulf Shores, Alabama | 95 kt |
| 2020 | Zeta | Near Cocodrie, Louisiana, then across southern Mississippi | 100 kt |
County detail is on the Mobile and Baldwin and Mississippi coast pages. For live warnings, see the directory's Alabama storm center and Mississippi storm center.
Roofing companies listed on the National Roofing Directory in the Alabama and Mississippi coastal cities this site covers:
Frequently asked questions
Which is stricter, Eurocode or ASCE 7?
The two cannot be ranked on one number. Eurocode begins from a 10-minute mean at a 50-year return period and multiplies it by safety factors, while ASCE 7 maps a 3-second gust at 700 years with a load factor of 1.0. Our standards comparison explains the differences.
Did FORTIFIED roofs perform better in Hurricane Sally?
Yes, according to the study the Alabama Department of Insurance commissioned. It found FORTIFIED homes reduced claim severity by 15 to 40 percent and cut loss frequency by 55 to 74 percent compared with standard construction.
Can Gulf Coast homeowners get help paying for a FORTIFIED roof?
In Alabama, Strengthen Alabama Homes awards grants of up to $10,000. In Mississippi, the Strengthen Mississippi Homes program currently takes interest forms only from eligible wind pool policyholders, chosen by lottery.
Where can I find a roofer on the Alabama or Mississippi coast?
Start with the directory's lists of Alabama roofing contractors and Mississippi roofing contractors, then confirm each company's state license.
Sources
- 24 to 28 ft along a swath of the Mississippi coast about 20 miles wide — nhc.noaa.gov
- came ashore at Gulf Shores at 95 kt — nhc.noaa.gov
- large sample of FORTIFIED homes — aldoi.gov
- as much as 90 percent of catastrophe-related insurance claims involve roof damage — fortifiedhome.org
- 10-minute mean speed with a 50-year return period — eurocodes.jrc.ec.europa.eu
- 1-in-500 annual chance of being exceeded — ncc.abcb.gov.au
- hourly wind speeds at 10- and 50-year return periods — climate-scenarios.canada.ca
- 3-second gust, at a 700-year return period for Risk Category II — tsapps.nist.gov
- FORTIFIED program — fortifiedhome.org
- grants of up to $10,000 — strengthenalabamahomes.com
- up to $10,000 to wind pool policyholders — mid.ms.gov
- NOAA's Storm Events Database — ncei.noaa.gov
- hail 4 inches across in Orange Beach — ncei.noaa.gov
- Ivan — nhc.noaa.gov
- Nate — nhc.noaa.gov
- Gordon — nhc.noaa.gov
- Zeta — nhc.noaa.gov
- Strengthen Mississippi Homes program — mid.ms.gov