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on 7/27/15Everything posted on the website is accurate. Please click any R-value for the parameters of the testing and regulation. Please also email sales@Insulation4Less.com for a more complete response including a technical pdf that may be helpful with your building department. Provide the width, length and height of building. Let us know if your sheeting is on already. Helpful page on understanding R-values: http://www.insulation4less.com/Insulation4lessTechnicalArticles-267-Reflective-Insulation-Fact-vs-Fiction.aspx
I have no way to verify company claims, but can verify that Prodex is making a marked difference in energy usage and reducing outside noise.