USA Insulation
USA Insulation advertises R20 wall insulation. Don't believe it!

As a certified energy auditor who has extensivly studied the subject, I can assure you that there is no insulation that will provide an R-20 insulation value in a 2 x 4 wall cavity. The best faom available is polyurethane which can achieve up to a value of R-6 per inch, but that is not the kind of foam that can be used in closed wall cavities.

The type of foam USA Insulation uses can provide a maximum value of R-3.66 per inch. Simple math reveals that the maximum R value in a 3.5 inch cavity would then be R-12.81. Effective wall R value is even less than this because over 9% of the entire wall that has studs on 16-inch centers is wood, and wood has a much lower R-value per inch (about 1.25). Come on, USA Insulation, get real!

Company: USA Insulation
Country: USA
State: Ohio
City: Cuyahoga Falls
Address: 3420 Cavalier Trail, Unit E
Phone: 3309225588

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