16 CFR § 460.8 - R-value tolerances.

---
identifier: "/us/cfr/t16/s460.8"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "16 CFR § 460.8 - R-value tolerances."
title_number: 16
title_name: "Commercial Practices"
section_number: "460.8"
section_name: "R-value tolerances."
chapter_name: "FEDERAL TRADE COMMISSION"
subchapter_number: "D"
subchapter_name: "TRADE REGULATION RULES"
part_number: "460"
part_name: "LABELING AND ADVERTISING OF HOME INSULATION"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 41  (38 Stat. 717, as amended)."
regulatory_source: "44 FR 50242, Aug. 27, 1979, unless otherwise noted."
cfr_part: "460"
---


# 460.8 R-value tolerances.

If 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.

[70 FR 31275, May 31, 2005]