Baltimore City Code, Building Codes, Part X, Sections 901 to 904
Sections 901 to 904.
{As in IRC}
Roof Assemblies
Baltimore City Code div. Building Codes, pt. X, pt. III, ch. 9
in effectBaltimore City Code, Building Codes, Part X, Section 905 Requirements for Roof Coverings
Section 905. Requirements for Roof Coverings
905.1 to 905.17 {As in IRC}
905.18 Reflectance.
Roof Coverings over conditioned spaces on low-slope roofs (roof slope < 2:12) on newly constructed buildings and additions to existing buildings shall have a minimum 3-year-aged solar reflective index of 78, as determined by the Cool Roof Rating Council.
Exceptions:
1. An addition to a roof that supports living vegetation and includes a synthetic, high quality waterproof membrane, drainage layer, soil layer, and lightweight medium plants.
2. Roof areas used as outdoor recreation space by the occupants of the building.
3. An area including and adjacent to rooftop photovoltaic and solar thermal equipment, totaling not more than 3 times the area that is covered with photovoltaic and solar thermal equipment.
4. Limited roof areas as determined by regulations promulgated by the department of housing & community development.
5. A roof, the area of which is less than 3% of the gross floor area of the building.
905.18.1 Conflicts.
In the event of a conflict between § 905.18 of this Code and City Code Article 6 {“Historical and Architectural Preservation”}, City Code Article 6 {“Historical and Architectural Preservation”} prevails.
(Ord. 23-252.)
Baltimore City Code, Building Codes, Part X, Sections 906 to 908
Sections 906 to 908.
{As in IRC}
Baltimore City Code, Building Codes, Part X, Sections 909 to 910 {Reserved}
Baltimore City Code, Building Codes, Part X, Section 911 Rooftop Decks and Other Structures
Section 911. Rooftop Decks and Other Structures
911.1 General.
All rooftop structures must comply with Baltimore City Building Code § 1510 {“Rooftop structures”}.
Source: City of Baltimore Department of Legislative Reference, City of Baltimore Law Library (codes.baltimorecity.gov; Open Law Library bulk XML)URL: https://codes.baltimorecity.gov/us/md/cities/baltimore/code/building-codes/X/III/9Fetched: 10/25/2026