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CFR > 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 (parts 3280 to 3800) > PART 3280—MANUFACTURED HOME CONSTRUCTION AND SAFETY STANDARDS > SUBPART F—Thermal Protection (§3280.501 to §3280.511) > 3280.503—Materials.
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.