---
kind: "section"
citation: "24 C.F.R. § 3280.503"
title: "24"
number: "3280.503"
heading: "Materials."
url: "https://uscodex.org/cfr/24/3280.503"
---

# §3280.503. Materials.


Materials used for insulation shall be of proven effectiveness and adequate durability to assure that required design conditions concerning thermal transmission are attained.


## Notes

### Authority

Authority: 15 U.S.C. 2697, 42 U.S.C. 3535(d), 5403, and 5424.

### Source

Source: 40 FR 58752, Dec. 18, 1975, unless otherwise noted. Redesignated at 44 FR 20679, Apr. 6, 1979.