Vapor barriers are materials used to slow or reduce the movement of water vapor through a material (water vapor is also transported by air leakage but this can be resolved by installing an air barrier).Vapor barrier materials are installed on the warm side of the insulation in a building assembly.ir barriers are not to be confused with vapor barriers or water resistive barriers. Each barrier have a different function to perform in a building assembly.
McFarland, California. McFarland (formerly, Hunt and Lone Pine) is a city in the San Joaquin Valley, in Kern County, California, United States. McFarland is located 6.5 miles (10 km) south of Delano, at an elevation of 354 feet (108 m). The population of McFarland, as of 2016, is 19,044.
McKean County, Pennsylvania. McKean County is a rural county in the U.S. state of Pennsylvania. As of the 2010 census, the population was 43,450. Its county seat is Smethport. The county was created in 1804 and organized in 1826. It was named in honor of former Pennsylvania Governor and Declaration of Independence signer Thomas McKean. McKean County comprises the Bradford, PA Micropolitan Statistical Area. It is in a sparsely populated region known as the Pennsylvania Wilds, including the Allegheny National Forest and borders New York.