User note:
About this chapter: Chapter 3 addresses broadly applicable requirements that would not be at home in other chapters having more specific coverage of subject matter. This chapter establishes climate zone by U.S. counties and also contains product rating, marking and installation requirements for materials such as insulation, windows, doors and siding.
Climate zones from Figure C301.1 or Table C301.1 shall be used for determining the applicable requirements from Chapter 4. Locations not indicated in Table C301.1 shall be assigned a climate zone in accordance with Section C301.3.
FIGURE C301.1
TABLE C301.1
CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID DESIGNATIONS BY STATE, COUNTY AND TERRITORY
Key: A — Moist, B — Dry, C — Marine. Absence of moisture designation indicates moisture regime is irrelevant. Asterisk (*) indicates a warm-humid location.
| US STATES |
| ALABAMA |
| 3A Autauga* |
| 2A Baldwin* |
| 3A Barbour* |
| 3A Bibb |
| 3A Blount |
| 3A Bullock* |
| 3A Butler* |
| 3A Calhoun |
| 3A Chambers |
| 3A Cherokee |
| 3A Chilton |
| 3A Choctaw* |
| 3A Clarke* |
| 3A Clay |
| 3A Cleburne |
| 3A Coffee* |
| 3A Colbert |
| 3A Conecuh* |
| 3A Coosa |
| 3A Covington* |
| 3A Crenshaw* |
| 3A Cullman |
| 3A Dale* |
| 3A Dallas* |
| 3A DeKalb |
| 3A Elmore* |
| 3A Escambia* |
| 3A Etowah |
| 3A Fayette |
| 3A Franklin |
| 3A Geneva* |
| 3A Greene |
| 3A Hale |
| 3A Henry* |
| 3A Houston* |
| 3A Jackson |
| 3A Jefferson |
| 3A Lamar |
| 3A Lauderdale |
| 3A Lawrence |
| 3A Lee |
| 3A Limestone |
| 3A Lowndes* |
| 3A Macon* |
| 3A Madison |
| 3A Marengo* |
| 3A Marion |
| 3A Marshall |
| 2A Mobile* |
| 3A Monroe* |
| 3A Montgomery* |
| 3A Morgan |
| 3A Perry* |
| 3A Pickens |
| 3A Pike* |
| 3A Randolph |
| 3A Russell* |
| 3A Shelby |
| 3A St. Clair |
| 3A Sumter |
| 3A Talladega |
| 3A Tallapoosa |
| 3A Tuscaloosa |
| 3A Walker |
| 3A Washington* |
| 3A Wilcox* |
| 3A Winston |
| ALASKA |
| 7 Aleutians East |
| 7 Aleutians West |
| 7 Anchorage |
| 8 Bethel |
| 7 Bristol Bay |
| 7 Denali |
| 8 Dillingham |
| 8 Fairbanks North Star |
| 7 Haines |
| 7 Juneau |
| 7 Kenai Peninsula |
| 7 Ketchikan Gateway |
| 7 Kodiak Island |
| 7 Lake and Peninsula |
| 7 Matanuska-Susitna |
| 8 Nome |
| 8 North Slope |
| 8 Northwest Arctic |
| 7 Prince of Wales-Outer Ketchikan |
| 7 Sitka |
| 7 Skagway-Hoonah-Angoon |
| 8 Southeast Fairbanks |
| 7 Valdez-Cordova |
| 8 Wade Hampton |
| 7 Wrangell-Petersburg |
| 7 Yakutat |
| 8 Yukon-Koyukuk |
| ARIZONA |
| 5B Apache |
| 3B Cochise |
| 5B Coconino |
| 4B Gila |
| 3B Graham |
| 3B Greenlee |
| 2B La Paz |
| 2B Maricopa |
| 3B Mohave |
| 5B Navajo |
| 2B Pima |
| 2B Pinal |
| 3B Santa Cruz |
| 4B Yavapai |
| 2B Yuma |
| ARKANSAS |
| 3A Arkansas |
| 3A Ashley |
| 4A Baxter |
| 4A Benton |
| 4A Boone |
| 3A Bradley |
| 3A Calhoun |
| 4A Carroll |
| 3A Chicot |
| 3A Clark |
| 3A Clay |
| 3A Cleburne |
| 3A Cleveland |
| 3A Columbia* |
| 3A Conway |
| 3A Craighead |
| 3A Crawford |
| 3A Crittenden |
| 3A Cross |
| 3A Dallas |
| 3A Desha |
| 3A Drew |
| 3A Faulkner |
| 3A Franklin |
| 4A Fulton |
| 3A Garland |
| 3A Grant |
| 3A Greene |
| 3A Hempstead* |
| 3A Hot Spring |
| 3A Howard |
| 3A Independence |
| 4A Izard |
| 3A Jackson |
| 3A Jefferson |
| 3A Johnson |
| 3A Lafayette* |
| 3A Lawrence |
| 3A Lee |
| 3A Lincoln |
| 3A Little River* |
| 3A Logan |
| 3A Lonoke |
| 4A Madison |
| 4A Marion |
| 3A Miller* |
| 3A Mississippi |
| 3A Monroe |
| 3A Montgomery |
| 3A Nevada |
| 4A Newton |
| 3A Ouachita |
| 3A Perry |
| 3A Phillips |
| 3A Pike |
| 3A Poinsett |
| 3A Polk |
| 3A Pope |
| 3A Prairie |
| 3A Pulaski |
| 3A Randolph |
| 3A Saline |
| 3A Scott |
| 4A Searcy |
| 3A Sebastian |
| 3A Sevier* |
| 3A Sharp |
| 3A St. Francis |
| 4A Stone |
| 3A Union* |
| 3A Van Buren |
| 4A Washington |
| 3A White |
| 3A Woodruff |
| 3A Yell |
| CALIFORNIA |
| 3C Alameda |
| 6B Alpine |
| 4B Amador |
| 3B Butte |
| 4B Calaveras |
| 3B Colusa |
| 3B Contra Costa |
| 4C Del Norte |
| 4B El Dorado |
| 3B Fresno |
| 3B Glenn |
| 4C Humboldt |
| 2B Imperial |
| 4B Inyo |
| 3B Kern |
| 3B Kings |
| 4B Lake |
| 5B Lassen |
| 3B Los Angeles |
| 3B Madera |
| 3C Marin |
| 4B Mariposa |
| 3C Mendocino |
| 3B Merced |
| 5B Modoc |
| 6B Mono |
| 3C Monterey |
| 3C Napa |
| 5B Nevada |
| 3B Orange |
| 3B Placer |
| 5B Plumas |
| 3B Riverside |
| 3B Sacramento |
| 3C San Benito |
| 3B San Bernardino |
| 3B San Diego |
| 3C San Francisco |
| 3B San Joaquin |
| 3C San Luis Obispo |
| 3C San Mateo |
| 3C Santa Barbara |
| 3C Santa Clara |
| 3C Santa Cruz |
| 3B Shasta |
| 5B Sierra |
| 5B Siskiyou |
| 3B Solano |
| 3C Sonoma |
| 3B Stanislaus |
| 3B Sutter |
| 3B Tehama |
| 4B Trinity |
| 3B Tulare |
| 4B Tuolumne |
| 3C Ventura |
| 3B Yolo |
| 3B Yuba |
| COLORADO |
| 5B Adams |
| 6B Alamosa |
| 5B Arapahoe |
| 6B Archuleta |
| 4B Baca |
| 5B Bent |
| 5B Boulder |
| 5B Broomfield |
| 6B Chaffee |
| 5B Cheyenne |
| 7 Clear Creek |
| 6B Conejos |
| 6B Costilla |
| 5B Crowley |
| 6B Custer |
| 5B Delta |
| 5B Denver |
| 6B Dolores |
| 5B Douglas |
| 6B Eagle |
| 5B Elbert |
| 5B El Paso |
| 5B Fremont |
| 5B Garfield |
| 5B Gilpin |
| 7 Grand |
| 7 Gunnison |
| 7 Hinsdale |
| 5B Huerfano |
| 7 Jackson |
| 5B Jefferson |
| 5B Kiowa |
| 5B Kit Carson |
| 7 Lake |
| 5B La Plata |
| 5B Larimer |
| 4B Las Animas |
| 5B Lincoln |
| 5B Logan |
| 5B Mesa |
| 7 Mineral |
| 6B Moffat |
| 5B Montezuma |
| 5B Montrose |
| 5B Morgan |
| 4B Otero |
| 6B Ouray |
| 7 Park |
| 5B Phillips |
| 7 Pitkin |
| 5B Prowers |
| 5B Pueblo |
| 6B Rio Blanco |
| 7 Rio Grande |
| 7 Routt |
| 6B Saguache |
| 7 San Juan |
| 6B San Miguel |
| 5B Sedgwick |
| 7 Summit |
| 5B Teller |
| 5B Washington |
| 5B Weld |
| 5B Yuma |
| CONNECTICUT |
| 5A (all) |
| DELAWARE |
| 4A (all) |
| DISTRICT OF COLUMBIA |
| 4A (all) |
| FLORIDA |
| 2A Alachua* |
| 2A Baker* |
| 2A Bay* |
| 2A Bradford* |
| 2A Brevard* |
| 1A Broward* |
| 2A Calhoun* |
| 2A Charlotte* |
| 2A Citrus* |
| 2A Clay* |
| 2A Collier* |
| 2A Columbia* |
| 2A DeSoto* |
| 2A Dixie* |
| 2A Duval* |
| 2A Escambia* |
| 2A Flagler* |
| 2A Franklin* |
| 2A Gadsden* |
| 2A Gilchrist* |
| 2A Glades* |
| 2A Gulf* |
| 2A Hamilton* |
| 2A Hardee* |
| 2A Hendry* |
| 2A Hernando* |
| 2A Highlands* |
| 2A Hillsborough* |
| 2A Holmes* |
| 2A Indian River* |
| 2A Jackson* |
| 2A Jefferson* |
| 2A Lafayette* |
| 2A Lake* |
| 2A Lee* |
| 2A Leon* |
| 2A Levy* |
| 2A Liberty* |
| 2A Madison* |
| 2A Manatee* |
| 2A Marion* |
| 2A Martin* |
| 1A Miami-Dade* |
| 1A Monroe* |
| 2A Nassau* |
| 2A Okaloosa* |
| 2A Okeechobee* |
| 2A Orange* |
| 2A Osceola* |
| 2A Palm Beach* |
| 2A Pasco* |
| 2A Pinellas* |
| 2A Polk* |
| 2A Putnam* |
| 2A Santa Rosa* |
| 2A Sarasota* |
| 2A Seminole* |
| 2A St. Johns* |
| 2A St. Lucie* |
| 2A Sumter* |
| 2A Suwannee* |
| 2A Taylor* |
| 2A Union* |
| 2A Volusia* |
| 2A Wakulla* |
| 2A Walton* |
| 2A Washington* |
| GEORGIA |
| 2A Appling* |
| 2A Atkinson* |
| 2A Bacon* |
| 2A Baker* |
| 3A Baldwin |
| 4A Banks |
| 3A Barrow |
| 3A Bartow |
| 3A Ben Hill* |
| 2A Berrien* |
| 3A Bibb |
| 3A Bleckley* |
| 2A Brantley* |
| 2A Brooks* |
| 2A Bryan* |
| 3A Bulloch* |
| 3A Burke |
| 3A Butts |
| 3A Calhoun* |
| 2A Camden* |
| 3A Candler* |
| 3A Carroll |
| 4A Catoosa |
| 2A Charlton* |
| 2A Chatham* |
| 3A Chattahoochee* |
| 4A Chattooga |
| 3A Cherokee |
| 3A Clarke |
| 3A Clay* |
| 3A Clayton |
| 2A Clinch* |
| 3A Cobb |
| 3A Coffee* |
| 2A Colquitt* |
| 3A Columbia |
| 2A Cook* |
| 3A Coweta |
| 3A Crawford |
| 3A Crisp* |
| 4A Dade |
| 4A Dawson |
| 2A Decatur* |
| 3A DeKalb |
| 3A Dodge* |
| 3A Dooly* |
| 3A Dougherty* |
| 3A Douglas |
| 3A Early* |
| 2A Echols* |
| 2A Effingham* |
| 3A Elbert |
| 3A Emanuel* |
| 2A Evans* |
| 4A Fannin |
| 3A Fayette |
| 4A Floyd |
| 3A Forsyth |
| 4A Franklin |
| 3A Fulton |
| 4A Gilmer |
| 3A Glascock |
| 2A Glynn* |
| 4A Gordon |
| 2A Grady* |
| 3A Greene |
| 3A Gwinnett |
| 4A Habersham |
| 4A Hall |
| 3A Hancock |
| 3A Haralson |
| 3A Harris |
| 3A Hart |
| 3A Heard |
| 3A Henry |
| 3A Houston* |
| 3A Irwin* |
| 3A Jackson |
| 3A Jasper |
| 2A Jeff Davis* |
| 3A Jefferson |
| 3A Jenkins* |
| 3A Johnson* |
| 3A Jones |
| 3A Lamar |
| 2A Lanier* |
| 3A Laurens* |
| 3A Lee* |
| 2A Liberty* |
| 3A Lincoln |
| 2A Long* |
| 2A Lowndes* |
| 4A Lumpkin |
| 3A Macon* |
| 3A Madison |
| 3A Marion* |
| 3A McDuffie |
| 2A McIntosh* |
| 3A Meriwether |
| 2A Miller* |
| 2A Mitchell* |
| 3A Monroe |
| 3A Montgomery* |
| 3A Morgan |
| 4A Murray |
| 3A Muscogee |
| 3A Newton |
| 3A Oconee |
| 3A Oglethorpe |
| 3A Paulding |
| 3A Peach* |
| 4A Pickens |
| 2A Pierce* |
| 3A Pike |
| 3A Polk |
| 3A Pulaski* |
| 3A Putnam |
| 3A Quitman* |
| 4A Rabun |
| 3A Randolph* |
| 3A Richmond |
| 3A Rockdale |
| 3A Schley* |
| 3A Screven* |
| 2A Seminole* |
| 3A Spalding |
| 4A Stephens |
| 3A Stewart* |
| 3A Sumter* |
| 3A Talbot |
| 3A Taliaferro |
| 2A Tattnall* |
| 3A Taylor* |
| 3A Telfair* |
| 3A Terrell* |
| 2A Thomas* |
| 3A Tift* |
| 2A Toombs* |
| 4A Towns |
| 3A Treutlen* |
| 3A Troup |
| 3A Turner* |
| 3A Twiggs* |
| 4A Union |
| 3A Upson |
| 4A Walker |
| 3A Walton |
| 2A Ware* |
| 3A Warren |
| 3A Washington |
| 2A Wayne* |
| 3A Webster* |
| 3A Wheeler* |
| 4A White |
| 4A Whitfield |
| 3A Wilcox* |
| 3A Wilkes |
| 3A Wilkinson |
| 3A Worth* |
| HAWAII |
| 1A (all)* |
| IDAHO |
| 5B Ada |
| 6B Adams |
| 6B Bannock |
| 6B Bear Lake |
| 5B Benewah |
| 6B Bingham |
| 6B Blaine |
| 6B Boise |
| 6B Bonner |
| 6B Bonneville |
| 6B Boundary |
| 6B Butte |
| 6B Camas |
| 5B Canyon |
| 6B Caribou |
| 5B Cassia |
| 6B Clark |
| 5B Clearwater |
| 6B Custer |
| 5B Elmore |
| 6B Franklin |
| 6B Fremont |
| 5B Gem |
| 5B Gooding |
| 5B Idaho |
| 6B Jefferson |
| 5B Jerome |
| 5B Kootenai |
| 5B Latah |
| 6B Lemhi |
| 5B Lewis |
| 5B Lincoln |
| 6B Madison |
| 5B Minidoka |
| 5B Nez Perce |
| 6B Oneida |
| 5B Owyhee |
| 5B Payette |
| 5B Power |
| 5B Shoshone |
| 6B Teton |
| 5B Twin Falls |
| 6B Valley |
| 5B Washington |
| ILLINOIS |
| 5A Adams |
| 4A Alexander |
| 4A Bond |
| 5A Boone |
| 5A Brown |
| 5A Bureau |
| 5A Calhoun |
| 5A Carroll |
| 5A Cass |
| 5A Champaign |
| 4A Christian |
| 5A Clark |
| 4A Clay |
| 4A Clinton |
| 5A Coles |
| 5A Cook |
| 4A Crawford |
| 5A Cumberland |
| 5A DeKalb |
| 5A De Witt |
| 5A Douglas |
| 5A DuPage |
| 5A Edgar |
| 4A Edwards |
| 4A Effingham |
| 4A Fayette |
| 5A Ford |
| 4A Franklin |
| 5A Fulton |
| 4A Gallatin |
| 5A Greene |
| 5A Grundy |
| 4A Hamilton |
| 5A Hancock |
| 4A Hardin |
| 5A Henderson |
| 5A Henry |
| 5A Iroquois |
| 4A Jackson |
| 4A Jasper |
| 4A Jefferson |
| 5A Jersey |
| 5A Jo Daviess |
| 4A Johnson |
| 5A Kane |
| 5A Kankakee |
| 5A Kendall |
| 5A Knox |
| 5A Lake |
| 5A La Salle |
| 4A Lawrence |
| 5A Lee |
| 5A Livingston |
| 5A Logan |
| 5A Macon |
| 4A Macoupin |
| 4A Madison |
| 4A Marion |
| 5A Marshall |
| 5A Mason |
| 4A Massac |
| 5A McDonough |
| 5A McHenry |
| 5A McLean |
| 5A Menard |
| 5A Mercer |
| 4A Monroe |
| 4A Montgomery |
| 5A Morgan |
| 5A Moultrie |
| 5A Ogle |
| 5A Peoria |
| 4A Perry |
| 5A Piatt |
| 5A Pike |
| 4A Pope |
| 4A Pulaski |
| 5A Putnam |
| 4A Randolph |
| 4A Richland |
| 5A Rock Island |
| 4A Saline |
| 5A Sangamon |
| 5A Schuyler |
| 5A Scott |
| 4A Shelby |
| 5A Stark |
| 4A St. Clair |
| 5A Stephenson |
| 5A Tazewell |
| 4A Union |
| 5A Vermilion |
| 4A Wabash |
| 5A Warren |
| 4A Washington |
| 4A Wayne |
| 4A White |
| 5A Whiteside |
| 5A Will |
| 4A Williamson |
| 5A Winnebago |
| 5A Woodford |
| INDIANA |
| 5A Adams |
| 5A Allen |
| 5A Bartholomew |
| 5A Benton |
| 5A Blackford |
| 5A Boone |
| 4A Brown |
| 5A Carroll |
| 5A Cass |
| 4A Clark |
| 5A Clay |
| 5A Clinton |
| 4A Crawford |
| 4A Daviess |
| 4A Dearborn |
| 5A Decatur |
| 5A De Kalb |
| 5A Delaware |
| 4A Dubois |
| 5A Elkhart |
| 5A Fayette |
| 4A Floyd |
| 5A Fountain |
| 5A Franklin |
| 5A Fulton |
| 4A Gibson |
| 5A Grant |
| 4A Greene |
| 5A Hamilton |
| 5A Hancock |
| 4A Harrison |
| 5A Hendricks |
| 5A Henry |
| 5A Howard |
| 5A Huntington |
| 4A Jackson |
| 5A Jasper |
| 5A Jay |
| 4A Jefferson |
| 4A Jennings |
| 5A Johnson |
| 4A Knox |
| 5A Kosciusko |
| 5A LaGrange |
| 5A Lake |
| 5A LaPorte |
| 4A Lawrence |
| 5A Madison |
| 5A Marion |
| 5A Marshall |
| 4A Martin |
| 5A Miami |
| 4A Monroe |
| 5A Montgomery |
| 5A Morgan |
| 5A Newton |
| 5A Noble |
| 4A Ohio |
| 4A Orange |
| 5A Owen |
| 5A Parke |
| 4A Perry |
| 4A Pike |
| 5A Porter |
| 4A Posey |
| 5A Pulaski |
| 5A Putnam |
| 5A Randolph |
| 4A Ripley |
| 5A Rush |
| 4A Scott |
| 5A Shelby |
| 4A Spencer |
| 5A Starke |
| 5A Steuben |
| 5A St. Joseph |
| 4A Sullivan |
| 4A Switzerland |
| 5A Tippecanoe |
| 5A Tipton |
| 5A Union |
| 4A Vanderburgh |
| 5A Vermillion |
| 5A Vigo |
| 5A Wabash |
| 5A Warren |
| 4A Warrick |
| 4A Washington |
| 5A Wayne |
| 5A Wells |
| 5A White |
| 5A Whitley |
| IOWA |
| 5A Adair |
| 5A Adams |
| 6A Allamakee |
| 5A Appanoose |
| 5A Audubon |
| 5A Benton |
| 6A Black Hawk |
| 5A Boone |
| 6A Bremer |
| 6A Buchanan |
| 6A Buena Vista |
| 6A Butler |
| 6A Calhoun |
| 5A Carroll |
| 5A Cass |
| 5A Cedar |
| 6A Cerro Gordo |
| 6A Cherokee |
| 6A Chickasaw |
| 5A Clarke |
| 6A Clay |
| 6A Clayton |
| 5A Clinton |
| 5A Crawford |
| 5A Dallas |
| 5A Davis |
| 5A Decatur |
| 6A Delaware |
| 5A Des Moines |
| 6A Dickinson |
| 5A Dubuque |
| 6A Emmet |
| 6A Fayette |
| 6A Floyd |
| 6A Franklin |
| 5A Fremont |
| 5A Greene |
| 6A Grundy |
| 5A Guthrie |
| 6A Hamilton |
| 6A Hancock |
| 6A Hardin |
| 5A Harrison |
| 5A Henry |
| 6A Howard |
| 6A Humboldt |
| 6A Ida |
| 5A Iowa |
| 5A Jackson |
| 5A Jasper |
| 5A Jefferson |
| 5A Johnson |
| 5A Jones |
| 5A Keokuk |
| 6A Kossuth |
| 5A Lee |
| 5A Linn |
| 5A Louisa |
| 5A Lucas |
| 6A Lyon |
| 5A Madison |
| 5A Mahaska |
| 5A Marion |
| 5A Marshall |
| 5A Mills |
| 6A Mitchell |
| 5A Monona |
| 5A Monroe |
| 5A Montgomery |
| 5A Muscatine |
| 6A O'Brien |
| 6A Osceola |
| 5A Page |
| 6A Palo Alto |
| 6A Plymouth |
| 6A Pocahontas |
| 5A Polk |
| 5A Pottawattamie |
| 5A Poweshiek |
| 5A Ringgold |
| 6A Sac |
| 5A Scott |
| 5A Shelby |
| 6A Sioux |
| 5A Story |
| 5A Tama |
| 5A Taylor |
| 5A Union |
| 5A Van Buren |
| 5A Wapello |
| 5A Warren |
| 5A Washington |
| 5A Wayne |
| 6A Webster |
| 6A Winnebago |
| 6A Winneshiek |
| 5A Woodbury |
| 6A Worth |
| 6A Wright |
| KANSAS |
| 4A Allen |
| 4A Anderson |
| 4A Atchison |
| 4A Barber |
| 4A Barton |
| 4A Bourbon |
| 4A Brown |
| 4A Butler |
| 4A Chase |
| 4A Chautauqua |
| 4A Cherokee |
| 5A Cheyenne |
| 4A Clark |
| 4A Clay |
| 5A Cloud |
| 4A Coffey |
| 4A Comanche |
| 4A Cowley |
| 4A Crawford |
| 5A Decatur |
| 4A Dickinson |
| 4A Doniphan |
| 4A Douglas |
| 4A Edwards |
| 4A Elk |
| 5A Ellis |
| 4A Ellsworth |
| 4A Finney |
| 4A Ford |
| 4A Franklin |
| 4A Geary |
| 5A Gove |
| 5A Graham |
| 4A Grant |
| 4A Gray |
| 5A Greeley |
| 4A Greenwood |
| 5A Hamilton |
| 4A Harper |
| 4A Harvey |
| 4A Haskell |
| 4A Hodgeman |
| 4A Jackson |
| 4A Jefferson |
| 5A Jewell |
| 4A Johnson |
| 4A Kearny |
| 4A Kingman |
| 4A Kiowa |
| 4A Labette |
| 5A Lane |
| 4A Leavenworth |
| 4A Lincoln |
| 4A Linn |
| 5A Logan |
| 4A Lyon |
| 4A Marion |
| 4A Marshall |
| 4A McPherson |
| 4A Meade |
| 4A Miami |
| 5A Mitchell |
| 4A Montgomery |
| 4A Morris |
| 4A Morton |
| 4A Nemaha |
| 4A Neosho |
| 5A Ness |
| 5A Norton |
| 4A Osage |
| 5A Osborne |
| 4A Ottawa |
| 4A Pawnee |
| 5A Phillips |
| 4A Pottawatomie |
| 4A Pratt |
| 5A Rawlins |
| 4A Reno |
| 5A Republic |
| 4A Rice |
| 4A Riley |
| 5A Rooks |
| 4A Rush |
| 4A Russell |
| 4A Saline |
| 5A Scott |
| 4A Sedgwick |
| 4A Seward |
| 4A Shawnee |
| 5A Sheridan |
| 5A Sherman |
| 5A Smith |
| 4A Stafford |
| 4A Stanton |
| 4A Stevens |
| 4A Sumner |
| 5A Thomas |
| 5A Trego |
| 4A Wabaunsee |
| 5A Wallace |
| 4A Washington |
| 5A Wichita |
| 4A Wilson |
| 4A Woodson |
| 4A Wyandotte |
| KENTUCKY |
| 4A (all) |
| LOUISIANA |
| 2A Acadia* |
| 2A Allen* |
| 2A Ascension* |
| 2A Assumption* |
| 2A Avoyelles* |
| 2A Beauregard* |
| 3A Bienville* |
| 3A Bossier* |
| 3A Caddo* |
| 2A Calcasieu* |
| 3A Caldwell* |
| 2A Cameron* |
| 3A Catahoula* |
| 3A Claiborne* |
| 3A Concordia* |
| 3A De Soto* |
| 2A East Baton Rouge* |
| 3A East Carroll |
| 2A East Feliciana* |
| 2A Evangeline* |
| 3A Franklin* |
| 3A Grant* |
| 2A Iberia* |
| 2A Iberville* |
| 3A Jackson* |
| 2A Jefferson* |
| 2A Jefferson Davis* |
| 2A Lafayette* |
| 2A Lafourche* |
| 3A La Salle* |
| 3A Lincoln* |
| 2A Livingston* |
| 3A Madison* |
| 3A Morehouse |
| 3A Natchitoches* |
| 2A Orleans* |
| 3A Ouachita* |
| 2A Plaquemines* |
| 2A Pointe Coupee* |
| 2A Rapides* |
| 3A Red River* |
| 3A Richland* |
| 3A Sabine* |
| 2A St. Bernard* |
| 2A St. Charles* |
| 2A St. Helena* |
| 2A St. James* |
| 2A St. John the Baptist* |
| 2A St. Landry* |
| 2A St. Martin* |
| 2A St. Mary* |
| 2A St. Tammany* |
| 2A Tangipahoa* |
| 3A Tensas* |
| 2A Terrebonne* |
| 3A Union* |
| 2A Vermilion* |
| 3A Vernon* |
| 2A Washington* |
| 3A Webster* |
| 2A West Baton Rouge* |
| 3A West Carroll |
| 2A West Feliciana* |
| 3A Winn* |
| MAINE |
| 6A Androscoggin |
| 7 Aroostook |
| 6A Cumberland |
| 6A Franklin |
| 6A Hancock |
| 6A Kennebec |
| 6A Knox |
| 6A Lincoln |
| 6A Oxford |
| 6A Penobscot |
| 6A Piscataquis |
| 6A Sagadahoc |
| 6A Somerset |
| 6A Waldo |
| 6A Washington |
| 6A York |
| MARYLAND |
| 4A Allegany |
| 4A Anne Arundel |
| 4A Baltimore |
| 4A Baltimore (city) |
| 4A Calvert |
| 4A Caroline |
| 4A Carroll |
| 4A Cecil |
| 4A Charles |
| 4A Dorchester |
| 4A Frederick |
| 5A Garrett |
| 4A Harford |
| 4A Howard |
| 4A Kent |
| 4A Montgomery |
| 4A Prince George's |
| 4A Queen Anne's |
| 4A Somerset |
| 4A St. Mary's |
| 4A Talbot |
| 4A Washington |
| 4A Wicomico |
| 4A Worcester |
| MASSACHUSETTS |
| 5A (all) |
| MICHIGAN |
| 6A Alcona |
| 6A Alger |
| 5A Allegan |
| 6A Alpena |
| 6A Antrim |
| 6A Arenac |
| 7 Baraga |
| 5A Barry |
| 5A Bay |
| 6A Benzie |
| 5A Berrien |
| 5A Branch |
| 5A Calhoun |
| 5A Cass |
| 6A Charlevoix |
| 6A Cheboygan |
| 7 Chippewa |
| 6A Clare |
| 5A Clinton |
| 6A Crawford |
| 6A Delta |
| 6A Dickinson |
| 5A Eaton |
| 6A Emmet |
| 5A Genesee |
| 6A Gladwin |
| 7 Gogebic |
| 6A Grand Traverse |
| 5A Gratiot |
| 5A Hillsdale |
| 7 Houghton |
| 6A Huron |
| 5A Ingham |
| 5A Ionia |
| 6A Iosco |
| 7 Iron |
| 6A Isabella |
| 5A Jackson |
| 5A Kalamazoo |
| 6A Kalkaska |
| 5A Kent |
| 7 Keweenaw |
| 6A Lake |
| 5A Lapeer |
| 6A Leelanau |
| 5A Lenawee |
| 5A Livingston |
| 7 Luce |
| 7 Mackinac |
| 5A Macomb |
| 6A Manistee |
| 6A Marquette |
| 6A Mason |
| 6A Mecosta |
| 6A Menominee |
| 5A Midland |
| 6A Missaukee |
| 5A Monroe |
| 5A Montcalm |
| 6A Montmorency |
| 5A Muskegon |
| 6A Newaygo |
| 5A Oakland |
| 6A Oceana |
| 6A Ogemaw |
| 7 Ontonagon |
| 6A Osceola |
| 6A Oscoda |
| 6A Otsego |
| 5A Ottawa |
| 6A Presque Isle |
| 6A Roscommon |
| 5A Saginaw |
| 6A Sanilac |
| 7 Schoolcraft |
| 5A Shiawassee |
| 5A St. Clair |
| 5A St. Joseph |
| 5A Tuscola |
| 5A Van Buren |
| 5A Washtenaw |
| 5A Wayne |
| 6A Wexford |
| MINNESOTA |
| 7 Aitkin |
| 6A Anoka |
| 7 Becker |
| 7 Beltrami |
| 6A Benton |
| 6A Big Stone |
| 6A Blue Earth |
| 6A Brown |
| 7 Carlton |
| 6A Carver |
| 7 Cass |
| 6A Chippewa |
| 6A Chisago |
| 7 Clay |
| 7 Clearwater |
| 7 Cook |
| 6A Cottonwood |
| 7 Crow Wing |
| 6A Dakota |
| 6A Dodge |
| 6A Douglas |
| 6A Faribault |
| 6A Fillmore |
| 6A Freeborn |
| 6A Goodhue |
| 7 Grant |
| 6A Hennepin |
| 6A Houston |
| 7 Hubbard |
| 6A Isanti |
| 7 Itasca |
| 6A Jackson |
| 7 Kanabec |
| 6A Kandiyohi |
| 7 Kittson |
| 7 Koochiching |
| 6A Lac qui Parle |
| 7 Lake |
| 7 Lake of the Woods |
| 6A Le Sueur |
| 6A Lincoln |
| 6A Lyon |
| 7 Mahnomen |
| 7 Marshall |
| 6A Martin |
| 6A McLeod |
| 6A Meeker |
| 7 Mille Lacs |
| 6A Morrison |
| 6A Mower |
| 6A Murray |
| 6A Nicollet |
| 6A Nobles |
| 7 Norman |
| 6A Olmsted |
| 7 Otter Tail |
| 7 Pennington |
| 7 Pine |
| 6A Pipestone |
| 7 Polk |
| 6A Pope |
| 6A Ramsey |
| 7 Red Lake |
| 6A Redwood |
| 6A Renville |
| 6A Rice |
| 6A Rock |
| 7 Roseau |
| 6A Scott |
| 6A Sherburne |
| 6A Sibley |
| 6A Stearns |
| 6A Steele |
| 6A Stevens |
| 7 St. Louis |
| 6A Swift |
| 6A Todd |
| 6A Traverse |
| 6A Wabasha |
| 7 Wadena |
| 6A Waseca |
| 6A Washington |
| 6A Watonwan |
| 7 Wilkin |
| 6A Winona |
| 6A Wright |
| 6A Yellow Medicine |
| MISSISSIPPI |
| 3A Adams* |
| 3A Alcorn |
| 3A Amite* |
| 3A Attala |
| 3A Benton |
| 3A Bolivar |
| 3A Calhoun |
| 3A Carroll |
| 3A Chickasaw |
| 3A Choctaw |
| 3A Claiborne* |
| 3A Clarke |
| 3A Clay |
| 3A Coahoma |
| 3A Copiah* |
| 3A Covington* |
| 3A DeSoto |
| 3A Forrest* |
| 3A Franklin* |
| 3A George* |
| 3A Greene* |
| 3A Grenada |
| 2A Hancock* |
| 2A Harrison* |
| 3A Hinds* |
| 3A Holmes |
| 3A Humphreys |
| 3A Issaquena |
| 3A Itawamba |
| 2A Jackson* |
| 3A Jasper |
| 3A Jefferson* |
| 3A Jefferson Davis* |
| 3A Jones* |
| 3A Kemper |
| 3A Lafayette |
| 3A Lamar* |
| 3A Lauderdale |
| 3A Lawrence* |
| 3A Leake |
| 3A Lee |
| 3A Leflore |
| 3A Lincoln* |
| 3A Lowndes |
| 3A Madison |
| 3A Marion* |
| 3A Marshall |
| 3A Monroe |
| 3A Montgomery |
| 3A Neshoba |
| 3A Newton |
| 3A Noxubee |
| 3A Oktibbeha |
| 3A Panola |
| 2A Pearl River* |
| 3A Perry* |
| 3A Pike* |
| 3A Pontotoc |
| 3A Prentiss |
| 3A Quitman |
| 3A Rankin* |
| 3A Scott |
| 3A Sharkey |
| 3A Simpson* |
| 3A Smith* |
| 2A Stone* |
| 3A Sunflower |
| 3A Tallahatchie |
| 3A Tate |
| 3A Tippah |
| 3A Tishomingo |
| 3A Tunica |
| 3A Union |
| 3A Walthall* |
| 3A Warren* |
| 3A Washington |
| 3A Wayne* |
| 3A Webster |
| 3A Wilkinson* |
| 3A Winston |
| 3A Yalobusha |
| 3A Yazoo |
| MISSOURI |
| 5A Adair |
| 5A Andrew |
| 5A Atchison |
| 4A Audrain |
| 4A Barry |
| 4A Barton |
| 4A Bates |
| 4A Benton |
| 4A Bollinger |
| 4A Boone |
| 5A Buchanan |
| 4A Butler |
| 5A Caldwell |
| 4A Callaway |
| 4A Camden |
| 4A Cape Girardeau |
| 4A Carroll |
| 4A Carter |
| 4A Cass |
| 4A Cedar |
| 5A Chariton |
| 4A Christian |
| 5A Clark |
| 4A Clay |
| 5A Clinton |
| 4A Cole |
| 4A Cooper |
| 4A Crawford |
| 4A Dade |
| 4A Dallas |
| 5A Daviess |
| 5A DeKalb |
| 4A Dent |
| 4A Douglas |
| 4A Dunklin |
| 4A Franklin |
| 4A Gasconade |
| 5A Gentry |
| 4A Greene |
| 5A Grundy |
| 5A Harrison |
| 4A Henry |
| 4A Hickory |
| 5A Holt |
| 4A Howard |
| 4A Howell |
| 4A Iron |
| 4A Jackson |
| 4A Jasper |
| 4A Jefferson |
| 4A Johnson |
| 5A Knox |
| 4A Laclede |
| 4A Lafayette |
| 4A Lawrence |
| 5A Lewis |
| 4A Lincoln |
| 5A Linn |
| 5A Livingston |
| 5A Macon |
| 4A Madison |
| 4A Maries |
| 5A Marion |
| 4A McDonald |
| 5A Mercer |
| 4A Miller |
| 4A Mississippi |
| 4A Moniteau |
| 4A Monroe |
| 4A Montgomery |
| 4A Morgan |
| 4A New Madrid |
| 4A Newton |
| 5A Nodaway |
| 4A Oregon |
| 4A Osage |
| 4A Ozark |
| 4A Pemiscot |
| 4A Perry |
| 4A Pettis |
| 4A Phelps |
| 5A Pike |
| 4A Platte |
| 4A Polk |
| 4A Pulaski |
| 5A Putnam |
| 5A Ralls |
| 4A Randolph |
| 4A Ray |
| 4A Reynolds |
| 4A Ripley |
| 4A Saline |
| 5A Schuyler |
| 5A Scotland |
| 4A Scott |
| 4A Shannon |
| 5A Shelby |
| 4A St. Charles |
| 4A St. Clair |
| 4A St. Francois |
| 4A St. Louis |
| 4A St. Louis (city) |
| 4A Ste. Genevieve |
| 4A Stoddard |
| 4A Stone |
| 5A Sullivan |
| 4A Taney |
| 4A Texas |
| 4A Vernon |
| 4A Warren |
| 4A Washington |
| 4A Wayne |
| 4A Webster |
| 5A Worth |
| 4A Wright |
| MONTANA |
| 6B (all) |
| NEBRASKA |
| 5A (all) |
| NEVADA |
| 5B Carson City (city) |
| 5B Churchill |
| 3B Clark |
| 5B Douglas |
| 5B Elko |
| 5B Esmeralda |
| 5B Eureka |
| 5B Humboldt |
| 5B Lander |
| 5B Lincoln |
| 5B Lyon |
| 5B Mineral |
| 5B Nye |
| 5B Pershing |
| 5B Storey |
| 5B Washoe |
| 5B White Pine |
| NEW HAMPSHIRE |
| 6A Belknap |
| 6A Carroll |
| 5A Cheshire |
| 6A Coos |
| 6A Grafton |
| 5A Hillsborough |
| 6A Merrimack |
| 5A Rockingham |
| 5A Strafford |
| 6A Sullivan |
| NEW JERSEY |
| 4A Atlantic |
| 5A Bergen |
| 4A Burlington |
| 4A Camden |
| 4A Cape May |
| 4A Cumberland |
| 4A Essex |
| 4A Gloucester |
| 4A Hudson |
| 5A Hunterdon |
| 5A Mercer |
| 4A Middlesex |
| 4A Monmouth |
| 5A Morris |
| 4A Ocean |
| 5A Passaic |
| 4A Salem |
| 5A Somerset |
| 5A Sussex |
| 4A Union |
| 5A Warren |
| NEW MEXICO |
| 4B Bernalillo |
| 5B Catron |
| 3B Chaves |
| 4B Cibola |
| 5B Colfax |
| 4B Curry |
| 4B DeBaca |
| 3B Doña Ana |
| 3B Eddy |
| 4B Grant |
| 4B Guadalupe |
| 5B Harding |
| 3B Hidalgo |
| 3B Lea |
| 4B Lincoln |
| 5B Los Alamos |
| 3B Luna |
| 5B McKinley |
| 5B Mora |
| 3B Otero |
| 4B Quay |
| 5B Rio Arriba |
| 4B Roosevelt |
| 5B Sandoval |
| 5B San Juan |
| 5B San Miguel |
| 5B Santa Fe |
| 4B Sierra |
| 4B Socorro |
| 5B Taos |
| 5B Torrance |
| 4B Union |
| 4B Valencia |
| NEW YORK |
| 5A Albany |
| 6A Allegany |
| 4A Bronx |
| 6A Broome |
| 6A Cattaraugus |
| 5A Cayuga |
| 5A Chautauqua |
| 5A Chemung |
| 6A Chenango |
| 6A Clinton |
| 5A Columbia |
| 5A Cortland |
| 6A Delaware |
| 5A Dutchess |
| 5A Erie |
| 6A Essex |
| 6A Franklin |
| 6A Fulton |
| 5A Genesee |
| 5A Greene |
| 6A Hamilton |
| 6A Herkimer |
| 6A Jefferson |
| 4A Kings |
| 6A Lewis |
| 5A Livingston |
| 6A Madison |
| 5A Monroe |
| 6A Montgomery |
| 4A Nassau |
| 4A New York |
| 5A Niagara |
| 6A Oneida |
| 5A Onondaga |
| 5A Ontario |
| 5A Orange |
| 5A Orleans |
| 5A Oswego |
| 6A Otsego |
| 5A Putnam |
| 4A Queens |
| 5A Rensselaer |
| 4A Richmond |
| 5A Rockland |
| 5A Saratoga |
| 5A Schenectady |
| 6A Schoharie |
| 6A Schuyler |
| 5A Seneca |
| 6A Steuben |
| 6A St. Lawrence |
| 4A Suffolk |
| 6A Sullivan |
| 5A Tioga |
| 6A Tompkins |
| 6A Ulster |
| 6A Warren |
| 5A Washington |
| 5A Wayne |
| 4A Westchester |
| 6A Wyoming |
| 5A Yates |
| NORTH CAROLINA |
| 4A Alamance |
| 4A Alexander |
| 5A Alleghany |
| 3A Anson |
| 5A Ashe |
| 5A Avery |
| 3A Beaufort |
| 4A Bertie |
| 3A Bladen |
| 3A Brunswick* |
| 4A Buncombe |
| 4A Burke |
| 3A Cabarrus |
| 4A Caldwell |
| 3A Camden |
| 3A Carteret* |
| 4A Caswell |
| 4A Catawba |
| 4A Chatham |
| 4A Cherokee |
| 3A Chowan |
| 4A Clay |
| 4A Cleveland |
| 3A Columbus* |
| 3A Craven |
| 3A Cumberland |
| 3A Currituck |
| 3A Dare |
| 3A Davidson |
| 4A Davie |
| 3A Duplin |
| 4A Durham |
| 3A Edgecombe |
| 4A Forsyth |
| 4A Franklin |
| 3A Gaston |
| 4A Gates |
| 4A Graham |
| 4A Granville |
| 3A Greene |
| 4A Guilford |
| 4A Halifax |
| 4A Harnett |
| 4A Haywood |
| 4A Henderson |
| 4A Hertford |
| 3A Hoke |
| 3A Hyde |
| 4A Iredell |
| 4A Jackson |
| 3A Johnston |
| 3A Jones |
| 4A Lee |
| 3A Lenoir |
| 4A Lincoln |
| 4A Macon |
| 4A Madison |
| 3A Martin |
| 4A McDowell |
| 3A Mecklenburg |
| 5A Mitchell |
| 3A Montgomery |
| 3A Moore |
| 4A Nash |
| 3A New Hanover* |
| 4A Northampton |
| 3A Onslow* |
| 4A Orange |
| 3A Pamlico |
| 3A Pasquotank |
| 3A Pender* |
| 3A Perquimans |
| 4A Person |
| 3A Pitt |
| 4A Polk |
| 3A Randolph |
| 3A Richmond |
| 3A Robeson |
| 4A Rockingham |
| 3A Rowan |
| 4A Rutherford |
| 3A Sampson |
| 3A Scotland |
| 3A Stanly |
| 4A Stokes |
| 4A Surry |
| 4A Swain |
| 4A Transylvania |
| 3A Tyrrell |
| 3A Union |
| 4A Vance |
| 4A Wake |
| 4A Warren |
| 3A Washington |
| 5A Watauga |
| 3A Wayne |
| 4A Wilkes |
| 3A Wilson |
| 4A Yadkin |
| 5A Yancey |
| NORTH DAKOTA |
| 6A Adams |
| 7 Barnes |
| 7 Benson |
| 6A Billings |
| 7 Bottineau |
| 6A Bowman |
| 7 Burke |
| 6A Burleigh |
| 7 Cass |
| 7 Cavalier |
| 6A Dickey |
| 7 Divide |
| 6A Dunn |
| 7 Eddy |
| 6A Emmons |
| 7 Foster |
| 6A Golden Valley |
| 7 Grand Forks |
| 6A Grant |
| 7 Griggs |
| 6A Hettinger |
| 7 Kidder |
| 6A LaMoure |
| 6A Logan |
| 7 McHenry |
| 6A McIntosh |
| 6A McKenzie |
| 7 McLean |
| 6A Mercer |
| 6A Morton |
| 7 Mountrail |
| 7 Nelson |
| 6A Oliver |
| 7 Pembina |
| 7 Pierce |
| 7 Ramsey |
| 6A Ransom |
| 7 Renville |
| 6A Richland |
| 7 Rolette |
| 6A Sargent |
| 7 Sheridan |
| 6A Sioux |
| 6A Slope |
| 6A Stark |
| 7 Steele |
| 7 Stutsman |
| 7 Towner |
| 7 Traill |
| 7 Walsh |
| 7 Ward |
| 7 Wells |
| 7 Williams |
| OHIO |
| 4A Adams |
| 5A Allen |
| 5A Ashland |
| 5A Ashtabula |
| 5A Athens |
| 5A Auglaize |
| 5A Belmont |
| 4A Brown |
| 5A Butler |
| 5A Carroll |
| 5A Champaign |
| 5A Clark |
| 4A Clermont |
| 5A Clinton |
| 5A Columbiana |
| 5A Coshocton |
| 5A Crawford |
| 5A Cuyahoga |
| 5A Darke |
| 5A Defiance |
| 5A Delaware |
| 5A Erie |
| 5A Fairfield |
| 5A Fayette |
| 5A Franklin |
| 5A Fulton |
| 4A Gallia |
| 5A Geauga |
| 5A Greene |
| 5A Guernsey |
| 4A Hamilton |
| 5A Hancock |
| 5A Hardin |
| 5A Harrison |
| 5A Henry |
| 5A Highland |
| 5A Hocking |
| 5A Holmes |
| 5A Huron |
| 5A Jackson |
| 5A Jefferson |
| 5A Knox |
| 5A Lake |
| 4A Lawrence |
| 5A Licking |
| 5A Logan |
| 5A Lorain |
| 5A Lucas |
| 5A Madison |
| 5A Mahoning |
| 5A Marion |
| 5A Medina |
| 5A Meigs |
| 5A Mercer |
| 5A Miami |
| 5A Monroe |
| 5A Montgomery |
| 5A Morgan |
| 5A Morrow |
| 5A Muskingum |
| 5A Noble |
| 5A Ottawa |
| 5A Paulding |
| 5A Perry |
| 5A Pickaway |
| 4A Pike |
| 5A Portage |
| 5A Preble |
| 5A Putnam |
| 5A Richland |
| 5A Ross |
| 5A Sandusky |
| 4A Scioto |
| 5A Seneca |
| 5A Shelby |
| 5A Stark |
| 5A Summit |
| 5A Trumbull |
| 5A Tuscarawas |
| 5A Union |
| 5A Van Wert |
| 5A Vinton |
| 5A Warren |
| 4A Washington |
| 5A Wayne |
| 5A Williams |
| 5A Wood |
| 5A Wyandot |
| OKLAHOMA |
| 3A Adair |
| 3A Alfalfa |
| 3A Atoka |
| 4B Beaver |
| 3A Beckham |
| 3A Blaine |
| 3A Bryan |
| 3A Caddo |
| 3A Canadian |
| 3A Carter |
| 3A Cherokee |
| 3A Choctaw |
| 4B Cimarron |
| 3A Cleveland |
| 3A Coal |
| 3A Comanche |
| 3A Cotton |
| 3A Craig |
| 3A Creek |
| 3A Custer |
| 3A Delaware |
| 3A Dewey |
| 3A Ellis |
| 3A Garfield |
| 3A Garvin |
| 3A Grady |
| 3A Grant |
| 3A Greer |
| 3A Harmon |
| 3A Harper |
| 3A Haskell |
| 3A Hughes |
| 3A Jackson |
| 3A Jefferson |
| 3A Johnston |
| 3A Kay |
| 3A Kingfisher |
| 3A Kiowa |
| 3A Latimer |
| 3A Le Flore |
| 3A Lincoln |
| 3A Logan |
| 3A Love |
| 3A Major |
| 3A Marshall |
| 3A Mayes |
| 3A McClain |
| 3A McCurtain |
| 3A McIntosh |
| 3A Murray |
| 3A Muskogee |
| 3A Noble |
| 3A Nowata |
| 3A Okfuskee |
| 3A Oklahoma |
| 3A Okmulgee |
| 3A Osage |
| 3A Ottawa |
| 3A Pawnee |
| 3A Payne |
| 3A Pittsburg |
| 3A Pontotoc |
| 3A Pottawatomie |
| 3A Pushmataha |
| 3A Roger Mills |
| 3A Rogers |
| 3A Seminole |
| 3A Sequoyah |
| 3A Stephens |
| 4B Texas |
| 3A Tillman |
| 3A Tulsa |
| 3A Wagoner |
| 3A Washington |
| 3A Washita |
| 3A Woods |
| 3A Woodward |
| OREGON |
| 5B Baker |
| 4C Benton |
| 4C Clackamas |
| 4C Clatsop |
| 4C Columbia |
| 4C Coos |
| 5B Crook |
| 4C Curry |
| 5B Deschutes |
| 4C Douglas |
| 5B Gilliam |
| 5B Grant |
| 5B Harney |
| 5B Hood River |
| 4C Jackson |
| 5B Jefferson |
| 4C Josephine |
| 5B Klamath |
| 5B Lake |
| 4C Lane |
| 4C Lincoln |
| 4C Linn |
| 5B Malheur |
| 4C Marion |
| 5B Morrow |
| 4C Multnomah |
| 4C Polk |
| 5B Sherman |
| 4C Tillamook |
| 5B Umatilla |
| 5B Union |
| 5B Wallowa |
| 5B Wasco |
| 4C Washington |
| 5B Wheeler |
| 4C Yamhill |
| PENNSYLVANIA |
| 5A Adams |
| 5A Allegheny |
| 5A Armstrong |
| 5A Beaver |
| 5A Bedford |
| 5A Berks |
| 5A Blair |
| 5A Bradford |
| 4A Bucks |
| 5A Butler |
| 5A Cambria |
| 6A Cameron |
| 5A Carbon |
| 5A Centre |
| 4A Chester |
| 5A Clarion |
| 6A Clearfield |
| 5A Clinton |
| 5A Columbia |
| 5A Crawford |
| 5A Cumberland |
| 5A Dauphin |
| 4A Delaware |
| 6A Elk |
| 5A Erie |
| 5A Fayette |
| 5A Forest |
| 5A Franklin |
| 5A Fulton |
| 5A Greene |
| 5A Huntingdon |
| 5A Indiana |
| 5A Jefferson |
| 5A Juniata |
| 5A Lackawanna |
| 5A Lancaster |
| 5A Lawrence |
| 5A Lebanon |
| 5A Lehigh |
| 5A Luzerne |
| 5A Lycoming |
| 6A McKean |
| 5A Mercer |
| 5A Mifflin |
| 5A Monroe |
| 4A Montgomery |
| 5A Montour |
| 5A Northampton |
| 5A Northumberland |
| 5A Perry |
| 4A Philadelphia |
| 5A Pike |
| 6A Potter |
| 5A Schuylkill |
| 5A Snyder |
| 5A Somerset |
| 5A Sullivan |
| 6A Susquehanna |
| 6A Tioga |
| 5A Union |
| 5A Venango |
| 5A Warren |
| 5A Washington |
| 6A Wayne |
| 5A Westmoreland |
| 5A Wyoming |
| 4A York |
| RHODE ISLAND |
| 5A (all) |
| SOUTH CAROLINA |
| 3A Abbeville |
| 3A Aiken |
| 3A Allendale* |
| 3A Anderson |
| 3A Bamberg* |
| 3A Barnwell* |
| 3A Beaufort* |
| 3A Berkeley* |
| 3A Calhoun |
| 3A Charleston* |
| 3A Cherokee |
| 3A Chester |
| 3A Chesterfield |
| 3A Clarendon |
| 3A Colleton* |
| 3A Darlington |
| 3A Dillon |
| 3A Dorchester* |
| 3A Edgefield |
| 3A Fairfield |
| 3A Florence |
| 3A Georgetown* |
| 3A Greenville |
| 3A Greenwood |
| 3A Hampton* |
| 3A Horry* |
| 3A Jasper* |
| 3A Kershaw |
| 3A Lancaster |
| 3A Laurens |
| 3A Lee |
| 3A Lexington |
| 3A Marion |
| 3A Marlboro |
| 3A McCormick |
| 3A Newberry |
| 3A Oconee |
| 3A Orangeburg |
| 3A Pickens |
| 3A Richland |
| 3A Saluda |
| 3A Spartanburg |
| 3A Sumter |
| 3A Union |
| 3A Williamsburg |
| 3A York |
| SOUTH DAKOTA |
| 6A Aurora |
| 6A Beadle |
| 5A Bennett |
| 5A Bon Homme |
| 6A Brookings |
| 6A Brown |
| 6A Brule |
| 6A Buffalo |
| 6A Butte |
| 6A Campbell |
| 5A Charles Mix |
| 6A Clark |
| 5A Clay |
| 6A Codington |
| 6A Corson |
| 6A Custer |
| 6A Davison |
| 6A Day |
| 6A Deuel |
| 6A Dewey |
| 5A Douglas |
| 6A Edmunds |
| 6A Fall River |
| 6A Faulk |
| 6A Grant |
| 5A Gregory |
| 6A Haakon |
| 6A Hamlin |
| 6A Hand |
| 6A Hanson |
| 6A Harding |
| 6A Hughes |
| 5A Hutchinson |
| 6A Hyde |
| 5A Jackson |
| 6A Jerauld |
| 6A Jones |
| 6A Kingsbury |
| 6A Lake |
| 6A Lawrence |
| 6A Lincoln |
| 6A Lyman |
| 6A Marshall |
| 6A McCook |
| 6A McPherson |
| 6A Meade |
| 5A Mellette |
| 6A Miner |
| 6A Minnehaha |
| 6A Moody |
| 6A Pennington |
| 6A Perkins |
| 6A Potter |
| 6A Roberts |
| 6A Sanborn |
| 6A Shannon |
| 6A Spink |
| 6A Stanley |
| 6A Sully |
| 5A Todd |
| 5A Tripp |
| 6A Turner |
| 5A Union |
| 6A Walworth |
| 5A Yankton |
| 6A Ziebach |
| TENNESSEE |
| 4A Anderson |
| 4A Bedford |
| 4A Benton |
| 4A Bledsoe |
| 4A Blount |
| 4A Bradley |
| 4A Campbell |
| 4A Cannon |
| 4A Carroll |
| 4A Carter |
| 4A Cheatham |
| 3A Chester |
| 4A Claiborne |
| 4A Clay |
| 4A Cocke |
| 4A Coffee |
| 3A Crockett |
| 4A Cumberland |
| 4A Davidson |
| 4A Decatur |
| 4A DeKalb |
| 4A Dickson |
| 3A Dyer |
| 3A Fayette |
| 4A Fentress |
| 4A Franklin |
| 4A Gibson |
| 4A Giles |
| 4A Grainger |
| 4A Greene |
| 4A Grundy |
| 4A Hamblen |
| 4A Hamilton |
| 4A Hancock |
| 3A Hardeman |
| 3A Hardin |
| 4A Hawkins |
| 3A Haywood |
| 3A Henderson |
| 4A Henry |
| 4A Hickman |
| 4A Houston |
| 4A Humphreys |
| 4A Jackson |
| 4A Jefferson |
| 4A Johnson |
| 4A Knox |
| 3A Lake |
| 3A Lauderdale |
| 4A Lawrence |
| 4A Lewis |
| 4A Lincoln |
| 4A Loudon |
| 4A Macon |
| 3A Madison |
| 4A Marion |
| 4A Marshall |
| 4A Maury |
| 4A McMinn |
| 3A McNairy |
| 4A Meigs |
| 4A Monroe |
| 4A Montgomery |
| 4A Moore |
| 4A Morgan |
| 4A Obion |
| 4A Overton |
| 4A Perry |
| 4A Pickett |
| 4A Polk |
| 4A Putnam |
| 4A Rhea |
| 4A Roane |
| 4A Robertson |
| 4A Rutherford |
| 4A Scott |
| 4A Sequatchie |
| 4A Sevier |
| 3A Shelby |
| 4A Smith |
| 4A Stewart |
| 4A Sullivan |
| 4A Sumner |
| 3A Tipton |
| 4A Trousdale |
| 4A Unicoi |
| 4A Union |
| 4A Van Buren |
| 4A Warren |
| 4A Washington |
| 4A Wayne |
| 4A Weakley |
| 4A White |
| 4A Williamson |
| 4A Wilson |
| TEXAS |
| 2A Anderson* |
| 3B Andrews |
| 2A Angelina* |
| 2A Aransas* |
| 3A Archer |
| 4B Armstrong |
| 2A Atascosa* |
| 2A Austin* |
| 4B Bailey |
| 2B Bandera |
| 2A Bastrop* |
| 3B Baylor |
| 2A Bee* |
| 2A Bell* |
| 2A Bexar* |
| 3A Blanco* |
| 3B Borden |
| 2A Bosque* |
| 3A Bowie* |
| 2A Brazoria* |
| 2A Brazos* |
| 3B Brewster |
| 4B Briscoe |
| 2A Brooks* |
| 3A Brown* |
| 2A Burleson* |
| 3A Burnet* |
| 2A Caldwell* |
| 2A Calhoun* |
| 3B Callahan |
| 2A Cameron* |
| 3A Camp* |
| 4B Carson |
| 3A Cass* |
| 4B Castro |
| 2A Chambers* |
| 2A Cherokee* |
| 3B Childress |
| 3A Clay |
| 4B Cochran |
| 3B Coke |
| 3B Coleman |
| 3A Collin* |
| 3B Collingsworth |
| 2A Colorado* |
| 2A Comal* |
| 3A Comanche* |
| 3B Concho |
| 3A Cooke |
| 2A Coryell* |
| 3B Cottle |
| 3B Crane |
| 3B Crockett |
| 3B Crosby |
| 3B Culberson |
| 4B Dallam |
| 3A Dallas* |
| 3B Dawson |
| 4B Deaf Smith |
| 3A Delta |
| 3A Denton* |
| 2A DeWitt* |
| 3B Dickens |
| 2B Dimmit |
| 4B Donley |
| 2A Duval* |
| 3A Eastland |
| 3B Ector |
| 2B Edwards |
| 3A Ellis* |
| 3B El Paso |
| 3A Erath* |
| 2A Falls* |
| 3A Fannin |
| 2A Fayette* |
| 3B Fisher |
| 4B Floyd |
| 3B Foard |
| 2A Fort Bend* |
| 3A Franklin* |
| 2A Freestone* |
| 2B Frio |
| 3B Gaines |
| 2A Galveston* |
| 3B Garza |
| 3A Gillespie* |
| 3B Glasscock |
| 2A Goliad* |
| 2A Gonzales* |
| 4B Gray |
| 3A Grayson |
| 3A Gregg* |
| 2A Grimes* |
| 2A Guadalupe* |
| 4B Hale |
| 3B Hall |
| 3A Hamilton* |
| 4B Hansford |
| 3B Hardeman |
| 2A Hardin* |
| 2A Harris* |
| 3A Harrison* |
| 4B Hartley |
| 3B Haskell |
| 2A Hays* |
| 3B Hemphill |
| 3A Henderson* |
| 2A Hidalgo* |
| 2A Hill* |
| 4B Hockley |
| 3A Hood* |
| 3A Hopkins* |
| 2A Houston* |
| 3B Howard |
| 3B Hudspeth |
| 3A Hunt* |
| 4B Hutchinson |
| 3B Irion |
| 3A Jack |
| 2A Jackson* |
| 2A Jasper* |
| 3B Jeff Davis |
| 2A Jefferson* |
| 2A Jim Hogg* |
| 2A Jim Wells* |
| 3A Johnson* |
| 3B Jones |
| 2A Karnes* |
| 3A Kaufman* |
| 3A Kendall* |
| 2A Kenedy* |
| 3B Kent |
| 3B Kerr |
| 3B Kimble |
| 3B King |
| 2B Kinney |
| 2A Kleberg* |
| 3B Knox |
| 3A Lamar* |
| 4B Lamb |
| 3A Lampasas* |
| 2B La Salle |
| 2A Lavaca* |
| 2A Lee* |
| 2A Leon* |
| 2A Liberty* |
| 2A Limestone* |
| 4B Lipscomb |
| 2A Live Oak* |
| 3A Llano* |
| 3B Loving |
| 3B Lubbock |
| 3B Lynn |
| 2A Madison* |
| 3A Marion* |
| 3B Martin |
| 3B Mason |
| 2A Matagorda* |
| 2B Maverick |
| 3B McCulloch |
| 2A McLennan* |
| 2A McMullen* |
| 2B Medina |
| 3B Menard |
| 3B Midland |
| 2A Milam* |
| 3A Mills* |
| 3B Mitchell |
| 3A Montague |
| 2A Montgomery* |
| 4B Moore |
| 3A Morris* |
| 3B Motley |
| 3A Nacogdoches* |
| 3A Navarro* |
| 2A Newton* |
| 3B Nolan |
| 2A Nueces* |
| 4B Ochiltree |
| 4B Oldham |
| 2A Orange* |
| 3A Palo Pinto* |
| 3A Panola* |
| 3A Parker* |
| 4B Parmer |
| 3B Pecos |
| 2A Polk* |
| 4B Potter |
| 3B Presidio |
| 3A Rains* |
| 4B Randall |
| 3B Reagan |
| 2B Real |
| 3A Red River* |
| 3B Reeves |
| 2A Refugio* |
| 4B Roberts |
| 2A Robertson* |
| 3A Rockwall* |
| 3B Runnels |
| 3A Rusk* |
| 3A Sabine* |
| 3A San Augustine* |
| 2A San Jacinto* |
| 2A San Patricio* |
| 3A San Saba* |
| 3B Schleicher |
| 3B Scurry |
| 3B Shackelford |
| 3A Shelby* |
| 4B Sherman |
| 3A Smith* |
| 3A Somervell* |
| 2A Starr* |
| 3A Stephens |
| 3B Sterling |
| 3B Stonewall |
| 3B Sutton |
| 4B Swisher |
| 3A Tarrant* |
| 3B Taylor |
| 3B Terrell |
| 3B Terry |
| 3B Throckmorton |
| 3A Titus* |
| 3B Tom Green |
| 2A Travis* |
| 2A Trinity* |
| 2A Tyler* |
| 3A Upshur* |
| 3B Upton |
| 2B Uvalde |
| 2B Val Verde |
| 3A Van Zandt* |
| 2A Victoria* |
| 2A Walker* |
| 2A Waller* |
| 3B Ward |
| 2A Washington* |
| 2B Webb |
| 2A Wharton* |
| 3B Wheeler |
| 3A Wichita |
| 3B Wilbarger |
| 2A Willacy* |
| 2A Williamson* |
| 2A Wilson* |
| 3B Winkler |
| 3A Wise |
| 3A Wood* |
| 4B Yoakum |
| 3A Young |
| 2B Zapata |
| 2B Zavala |
| UTAH |
| 5B Beaver |
| 6B Box Elder |
| 6B Cache |
| 6B Carbon |
| 6B Daggett |
| 5B Davis |
| 6B Duchesne |
| 5B Emery |
| 5B Garfield |
| 5B Grand |
| 5B Iron |
| 5B Juab |
| 5B Kane |
| 5B Millard |
| 6B Morgan |
| 5B Piute |
| 6B Rich |
| 5B Salt Lake |
| 5B San Juan |
| 5B Sanpete |
| 5B Sevier |
| 6B Summit |
| 5B Tooele |
| 6B Uintah |
| 5B Utah |
| 6B Wasatch |
| 3B Washington |
| 5B Wayne |
| 5B Weber |
| VERMONT |
| 6A (all) |
| VIRGINIA |
| 4A (all) |
| WASHINGTON |
| 5B Adams |
| 5B Asotin |
| 5B Benton |
| 5B Chelan |
| 4C Clallam |
| 4C Clark |
| 5B Columbia |
| 4C Cowlitz |
| 5B Douglas |
| 6B Ferry |
| 5B Franklin |
| 5B Garfield |
| 5B Grant |
| 4C Grays Harbor |
| 4C Island |
| 4C Jefferson |
| 4C King |
| 4C Kitsap |
| 5B Kittitas |
| 5B Klickitat |
| 4C Lewis |
| 5B Lincoln |
| 4C Mason |
| 6B Okanogan |
| 4C Pacific |
| 6B Pend Oreille |
| 4C Pierce |
| 4C San Juan |
| 4C Skagit |
| 5B Skamania |
| 4C Snohomish |
| 5B Spokane |
| 6B Stevens |
| 4C Thurston |
| 4C Wahkiakum |
| 5B Walla Walla |
| 4C Whatcom |
| 5B Whitman |
| 5B Yakima |
| WEST VIRGINIA |
| 5A Barbour |
| 4A Berkeley |
| 4A Boone |
| 4A Braxton |
| 5A Brooke |
| 4A Cabell |
| 4A Calhoun |
| 4A Clay |
| 5A Doddridge |
| 5A Fayette |
| 4A Gilmer |
| 5A Grant |
| 5A Greenbrier |
| 5A Hampshire |
| 5A Hancock |
| 5A Hardy |
| 5A Harrison |
| 4A Jackson |
| 4A Jefferson |
| 4A Kanawha |
| 5A Lewis |
| 4A Lincoln |
| 4A Logan |
| 5A Marion |
| 5A Marshall |
| 4A Mason |
| 4A McDowell |
| 4A Mercer |
| 5A Mineral |
| 4A Mingo |
| 5A Monongalia |
| 4A Monroe |
| 4A Morgan |
| 5A Nicholas |
| 5A Ohio |
| 5A Pendleton |
| 4A Pleasants |
| 5A Pocahontas |
| 5A Preston |
| 4A Putnam |
| 5A Raleigh |
| 5A Randolph |
| 4A Ritchie |
| 4A Roane |
| 5A Summers |
| 5A Taylor |
| 5A Tucker |
| 4A Tyler |
| 5A Upshur |
| 4A Wayne |
| 5A Webster |
| 5A Wetzel |
| 4A Wirt |
| 4A Wood |
| 4A Wyoming |
| WISCONSIN |
| 6A Adams |
| 7 Ashland |
| 6A Barron |
| 7 Bayfield |
| 6A Brown |
| 6A Buffalo |
| 7 Burnett |
| 6A Calumet |
| 6A Chippewa |
| 6A Clark |
| 6A Columbia |
| 6A Crawford |
| 6A Dane |
| 6A Dodge |
| 6A Door |
| 7 Douglas |
| 6A Dunn |
| 6A Eau Claire |
| 7 Florence |
| 6A Fond du Lac |
| 7 Forest |
| 6A Grant |
| 6A Green |
| 6A Green Lake |
| 6A Iowa |
| 7 Iron |
| 6A Jackson |
| 6A Jefferson |
| 6A Juneau |
| 6A Kenosha |
| 6A Kewaunee |
| 6A La Crosse |
| 6A Lafayette |
| 7 Langlade |
| 7 Lincoln |
| 6A Manitowoc |
| 6A Marathon |
| 6A Marinette |
| 6A Marquette |
| 6A Menominee |
| 6A Milwaukee |
| 6A Monroe |
| 6A Oconto |
| 7 Oneida |
| 6A Outagamie |
| 6A Ozaukee |
| 6A Pepin |
| 6A Pierce |
| 6A Polk |
| 6A Portage |
| 7 Price |
| 6A Racine |
| 6A Richland |
| 6A Rock |
| 6A Rusk |
| 6A Sauk |
| 7 Sawyer |
| 6A Shawano |
| 6A Sheboygan |
| 6A St. Croix |
| 7 Taylor |
| 6A Trempealeau |
| 6A Vernon |
| 7 Vilas |
| 6A Walworth |
| 7 Washburn |
| 6A Washington |
| 6A Waukesha |
| 6A Waupaca |
| 6A Waushara |
| 6A Winnebago |
| 6A Wood |
| WYOMING |
| 6B Albany |
| 6B Big Horn |
| 6B Campbell |
| 6B Carbon |
| 6B Converse |
| 6B Crook |
| 6B Fremont |
| 5B Goshen |
| 6B Hot Springs |
| 6B Johnson |
| 6B Laramie |
| 7 Lincoln |
| 6B Natrona |
| 6B Niobrara |
| 6B Park |
| 5B Platte |
| 6B Sheridan |
| 7 Sublette |
| 6B Sweetwater |
| 7 Teton |
| 6B Uinta |
| 6B Washakie |
| 6B Weston |
| US TERRITORIES |
| AMERICAN SAMOA |
| 1A (all)* |
| GUAM |
| 1A (all)* |
| NORTHERN MARIANA ISLANDS |
| 1A (all)* |
| PUERTO RICO |
| 1A (all)* |
| VIRGIN ISLANDS |
| 1A (all)* |
In Table C301.1, warm humid counties are identified by an asterisk.
The climate zone for any location outside the United States shall be determined by applying Table C301.3(1) and then Table C301.3(2).
INTERNATIONAL CLIMATE ZONE DEFINITIONS
| MAJOR CLIMATE TYPE DEFINITIONS |
Marine (C) Definition—Locations meeting all four criteria:
|
| Dry (B) Definition—Locations meeting the following criteria:
Not marine and Pin < 0.44 × (TF - 19.5) [Pcm < 2.0 × (TC + 7) in SI units]
where:
Pin = Annual precipitation in inches (cm)
T = Annual mean temperature in °F (°C)
|
| Moist (A) Definition—Locations that are not marine and not dry. |
Warm-humid Definition—Moist (A) locations where either of the following wet-bulb temperature conditions shall occur during the warmest six consecutive months of the year:
|
For SI: °C = [(°F)-32]/1.8, 1 inch = 2.54 cm.
INTERNATIONAL CLIMATE ZONE DEFINITIONS
| ZONE NUMBER |
THERMAL CRITERIA | |
| IP Units | SI Units | |
| 1 | 9000 < CDD50°F | 5000 < CDD10°C |
| 2 | 6300 < CDD50°F ≤ 9000 | 3500 < CDD10°C ≤ 5000 |
| 3A and 3B | 4500 < CDD50°F ≤ 6300 AND HDD65°F ≤ 5400 | 2500 < CDD10°C ≤ 3500 AND HDD18°C ≤ 3000 |
| 4A and 4B | CDD50°F ≤ 4500 AND HDD65°F ≤ 5400 | CDD10°C ≤ 2500 AND HDD18°C ≤ 3000 |
| 3C | HDD65°F ≤ 3600 | HDD18°C ≤ 2000 |
| 4C | 3600 < HDD65°F ≤ 5400 | 2000 < HDD18°C ≤ 3000 |
| 5 | 5400 < HDD65°F ≤ 7200 | 3000 < HDD18°C ≤ 4000 |
| 6 | 7200 < HDD65°F ≤ 9000 | 4000 < HDD18°C ≤ 5000 |
| 7 | 9000 < HDD65°F ≤ 12600 | 5000 < HDD18°C ≤ 7000 |
| 8 | 12600 < HDD65°F | 7000 < HDD18°C |
For SI: °C = [(°F)-32]/1.8.
The tropical climate zone shall be defined as:
- Hawaii, Puerto Rico, Guam, American Samoa, U.S. Virgin Islands, Commonwealth of Northern Mariana Islands; and
- Islands in the area between the Tropic of Cancer and the Tropic of Capricorn.
The interior design temperatures used for heating and cooling load calculations shall be a maximum of 72°F (22°C) for heating and minimum of 75°F (24°C) for cooling.
Materials, systems and equipment shall be identified in a manner that will allow a determination of compliance with the applicable provisions of this code.
An R-value identification mark shall be applied by the manufacturer to each piece of building thermal envelope insulation 12 inches (305 mm) or greater in width. Alternatively, the insulation installers shall provide a certification listing the type, manufacturer and R-value of insulation installed in each element of the building thermal envelope. For blown-in or sprayed fiberglass and cellulose insulation, the initial installed thickness, settled thickness, settled R-value, installed density, coverage area and number of bags installed shall be listed on the certification. For sprayed polyurethane foam (SPF) insulation, the installed thickness of the areas covered and R-value of installed thickness shall be listed on the certification. For insulated siding, the R-value shall be labeled on the product's package and shall be listed on the certification. The insulation installer shall sign, date and post the certification in a conspicuous location on the job site.
Exception: For roof insulation installed above the deck, the R-value shall be labeled as required by the material standards specified in Table 1508.2 of the International Building Code.
The thickness of blown-in or sprayed fiberglass and cellulose roof/ceiling insulation shall be written in inches (mm) on markers and one or more of such markers shall be installed for every 300 square feet (28 m2) of attic area throughout the attic space. The markers shall be affixed to the trusses or joists and marked with the minimum initial installed thickness with numbers not less than 1 inch (25 mm) in height. Each marker shall face the attic access opening. Spray polyurethane foam thickness and installed R-value shall be listed on certification provided by the insulation installer.
Insulating materials shall be installed such that the manufacturer's R-value mark is readily observable upon inspection.
U-factors of fenestration products shall be determined as follows:
- For windows, doors and skylights, U-factor ratings shall be determined in accordance with NFRC 100.
- Where required for garage doors and rolling doors, U-factor ratings shall be determined in accordance with either NFRC 100 or ANSI/DASMA 105.
U-factors shall be determined by an accredited, independent laboratory, and labeled and certified by the manufacturer.
Products lacking such a labeled U-factor shall be assigned a default U-factor from Table C303.1.3(1) or C303.1.3(2). The solar heat gain coefficient (SHGC) and visible transmittance (VT) of glazed fenestration products (windows, glazed doors and skylights) shall be determined in accordance with NFRC 200 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled SHGC or VT shall be assigned a default SHGC or VT from Table C303.1.3(3).
DEFAULT GLAZED WINDOW, GLASS DOOR AND SKYLIGHT U-FACTORS
| FRAME TYPE | WINDOW AND GLASS DOOR | SKYLIGHT | ||
| Single | Double | Single | Double | |
| Metal | 1.20 | 0.80 | 2.00 | 1.30 |
| Metal with Thermal Break | 1.10 | 0.65 | 1.90 | 1.10 |
| Nonmetal or Metal Clad | 0.95 | 0.55 | 1.75 | 1.05 |
| Glazed Block | 0.60 | |||
DEFAULT OPAQUE DOOR U-FACTORS
| DOOR TYPE | OPAQUE U-FACTOR |
| Uninsulated Metal | 1.20 |
| Insulated Metal (Rolling) | 0.90 |
| Insulated Metal (Other) | 0.60 |
| Wood | 0.50 |
| Insulated, nonmetal edge, max 45% glazing, any glazing double pane | 0.35 |
The thermal resistance (R-value) of insulation shall be determined in accordance with the U.S. Federal Trade Commission R-value rule (CFR Title 16, Part 460) in units of h • ft2 • °F/Btu at a mean temperature of 75°F (24°C).
The thermal resistance (R-value) of insulated siding shall be determined in accordance with ASTM C1363. Installation for testing shall be in accordance with the manufacturer's instructions.
Materials, systems and equipment shall be installed in accordance with the manufacturer's instructions and the International Building Code.
Insulation applied to the exterior of basement walls, crawl space walls and the perimeter of slab-on-grade floors shall have a rigid, opaque and weather-resistant protective covering to prevent the degradation of the insulation's thermal performance. The protective covering shall cover the exposed exterior insulation and extend not less than 6 inches (153 mm) below grade.
Where two or more layers of continuous insulation board are used in a construction assembly, the continuous insulation boards shall be installed in accordance with Section C303.2. Where the continuous insulation board manufacturer's instructions do not address installation of two or more layers, the edge joints between each layer of continuous insulation boards shall be staggered.