Humid or Fringe Climates Explanation

Title 24. Code of Federal Regulations

3280.504(b)(4) "Homes manufactured to be sited in "humid climates" or "fringe climates" are permitted to have a vapor retarder specified installed on the exterior side of the wall insulation or be constructed with an external covering and sheathing."
NOTE: If your home was built to be placed in one of the humid and fringe counties listed below, it should not be moved into another that is not considered to be a humid and fringe county. Doing this could cause considerable condensation damage to your home that may not become evident for several years.

3280.504(b)(5) The following Texas counties are considered to be in the humid and fringe area: Anderson, Angelina, Aransas, Atascosa, Austin, Bastrop, Bee, Bexar, Brazoria, Brazos, Brooks, Burleson, Caldwell, Calhoun, Cameron, Camp, Cass, Chambers, Cherokee, Colorado, Comal, De Witt, Dimmit, Duval, Falls, Fayette, Fort Bend, Franklin, Freestone, Frio, Galveston, Goliad, Gonzales, Gregg, Grimes, Guadalupe, Hardin, Harris, Harrison, Hays, Henderson, Hidalgo, Hopkins, Houston, Jackson, Jasper, Jefferson, Jim Hogg, Jim Wells, Karnes, Kaufman, Kennedy, Kinney, Kleberg, La Salle, Lavaca, Lee, Leon, Liberty, Limestone, Live Oak, Madison, Marion, Matagorda, Maverick, McMullen, Medina, Milam, Montgomery, Morris, Nacogdoches, Navarro, Newton, Nueces, Orange, Panola, Polk, Rains, Refugio, Robertson, Rusk, Sabine, San Augustine, San Jacinto, San Patricio, Shelby, Smith, Starr, Titus, Travis, Trinity, Tyler, Upshur, Uvalde, Val Verde, Van Zandt, Victoria, Walker, Waller, Washington, Webb, Wharton, Willacy, Williamson, Wilson, Wood, Zapata and Zavala.