{"data":{"id":"us/24-cfr-3280.503","jurisdiction":"us","citation":"24 CFR 3280.503","heading":"Materials.","body":"Materials used for insulation shall be of proven effectiveness and adequate durability to assure that required design conditions concerning thermal transmission are attained.","path":["Title 24—Housing and Urban Development","Subtitle B—Regulations Relating to Housing and Urban Development","CHAPTER XX—OFFICE OF ASSISTANT SECRETARY FOR HOUSING—FEDERAL HOUSING COMMISSIONER, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT","PART 3280—MANUFACTURED HOME CONSTRUCTION AND SAFETY STANDARDS","Subpart F—Thermal Protection"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-24.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:55Z","sha256":"70e5d4aac2a6cdfa41ab00a5f237b626d597e306d7d6725f4fdecb43e1a41af7","source_id":"us-cfr","stale":true,"prev":"us/24-cfr-3280.502","next":"us/24-cfr-3280.504"},"notice":"GroundRules: Original legal text. Not legal advice."}