R-value tolerances.
16 C.F.R. § 460.8
in effectEffective: 2024-07-01If you are a manufacturer of home insulation, no individual specimen of the insulation you sell can have an R-value more than 10% below the R-value shown in a label, fact sheet, ad, or other promotional material for that insulation. If you are not a manufacturer, you can rely on the R-value data given to you by the manufacturer, unless you know or should know that the data is false or not based on the proper tests.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-16.xmlFetched: 7/26/2026
