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Housewrap functions as a weather-resistant barrier, preventing rain or other forms of moisture from getting into the wall assembly while allowing water vapor to pass to the exterior. If moisture from either direction is allowed to build up within stud or cavity walls, mold and rot can set in and fiberglass or cellulose insulation will lose its ...
The function of a vapor barrier is to retard the migration of water vapor. A vapor barrier is not typically intended to retard the migration of air. This is the function of air barriers. [8] Air is mixed with water vapor. When air moves from location to location due to an air pressure difference, the vapor moves with it.
Tyvek is a nonwoven product consisting of spun bond olefin fiber.It was first discovered in 1955 by a researcher for the DuPont textile company working in an experimental lab, who noticed a type of white fluff coming out of a pipe. [2]
The Lower Neches Valley Authority was established in 1933 by the state legislature as a district to store, control, conserve, and utilize the water of the lower Neches River valley in Texas. The LNVA, the second river district created by the state of Texas , is currently one of 23 river districts in the state.
A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure, and high pressure.
Greater San Antonio has a number of communities spread out across several counties and regions. It is centered on the city of San Antonio, the second largest city in Texas, second largest city in the Southern United States, [6] and the seventh largest city in the USA, with roughly 1.5 million residents spread across approximately 500 square miles.
In the spring of 1878, the city officially founded the San Antonio Volunteer Fire Department. [6] As the city of San Antonio continued to expand and grow, so did the volunteer fire companies. During the early 1880s, three new fire companies were established. The first was the Second Ward Hose Company which was founded on April 14, 1883.
Joint Base San Antonio (JBSA) is a United States military facility located in San Antonio, Texas, US. The facility is under the jurisdiction of the United States Air Force 502d Air Base Wing , Air Education and Training Command (AETC).
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