Roof criteria.
Columbus City Codes § 4191.13
in effect4191.13 - Roof criteria.
(A) With attic or rafter space at least six inches deep, and a ceiling below, the roof shall consist of no less than one-half inch composition board or plywood sheathing topped by roofing as required.
(B) If the underside of the roof is exposed, or if the attic or rafter space is less than six inches, the roof construction shall have a surface weight of at least six pounds per square foot, except in Subdistrict B or C, noise control areas over 70 Ldn, the roof construction shall have a surface weight of at least nine pounds per square foot. Rafters, joists or other framing shall not be included in the surface weight calculation.
(C) Window or dome skylights shall be double-glazed and separated by at least a one-half inch airspace. Skylights are not permitted within Subdistrict B or C (noise control areas over 70 Ldn) of the AEO-Airport Environs Overlay District.
(D) Insulation material rated R-30 or greater shall be installed continuously throughout the cavity space between the roof and the ceiling. Insulation shall be glass fiber, foam or mineral wool.
(Ord. 1138-94.)
Source: City of Columbus, City Codes and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/oh/columbus/codes/code_of_ordinances?nodeId=TIT41BUCO_CH4191AIEN_4191.13ROCRFetched: 10/27/2026