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Polyurethane is a closed-cell foam insulation material that initially contains a low-conductivity gas in its cells. [6] As a result of the high thermal resistance of the gas, spray polyurethane insulation typically has an initial R-value around R-3.4 to R-6.7 per inch. [6] In comparison, glass wool typically has an R-Value of only R-3 to R-4 ...
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.
While open-cell foams typically have R-values of 3 to 4 per inch (RSI-0.53 to RSI-0.70 per inch), closed-cell foams can attain R-values of 5 to 8 per inch (RSI-0.88 to RSI-1.41 per inch). This is important if space is limited, because it allows a thinner layer of insulation to be used.
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WASHINGTON (Reuters) -A U.S. Justice Department watchdog report released on Thursday debunked claims by far-right conspiracy theorists who falsely alleged that FBI operatives were secretly ...
That's four of the eight playoff spots, plus whoever emerges from the jammed up NFC West, where the 6-4 Cardinals are a game up on the rest of the division. So three spots essentially remain.
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