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This is a list of insulation materials used around the world. Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.
A 1990 New York Times article titled "Outdoor Wear: Sorting Out the Choices" featured statements by Edward Howell, then L.L. Bean's director of product development, describing PrimaLoft insulation as a high-loft synthetic alternative to down with similar performance dry, but superior performance wet. Since then, PrimaLoft has gone on to become ...
A thicker layer of trapped air gives more insulation. This thickness is often called "loft." A comforter that uses 550 fill power down, for example, would have to use approximately 40%-50% greater weight of down than a similar item that uses 800 fill power down to provide the same loft.
The use of highly compressed straw bales as insulation, though uncommon, is gaining popularity in experimental building projects for the high R-value and low cost of a thick wall made of straw. "Research by Joe McCabe at the Univ. of Arizona found R-value for both wheat and rice bales was about R-2.4 (RSI-0.42) per inch with the grain, and R-3 ...
The thermal resistance R-value provided by Thinsulate products varies by the specific thickness and construction of the fabric. [12] Values (US units) range from 1.6 for 80-gram fabric to 2.9 for 200-gram fabric. [13] Thinsulate is considered "the warmest thin apparel insulation" available.
EPS is the most common of the foams used and has an R-value (thermal resistance) of about 4 °F·ft 2 ·h/Btu (equivalent to about 0.7 K·m 2 /W) per 25 mm thickness, which would give the 3.5 inches (89 mm) of foam in a 4.5-inch-thick (110 mm) panel an R value of 13.8 (caution: extrapolating R-values over thickness may be imprecise due to non ...
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