All principal buildings and structures located in the zoning districts "R-3.5", "R-3.75", "R-MF", "R-5.0", "PRD-6", "PRD-12", and "R-TH" shall be of exterior fire resistant construction, having at least 80 percent of the total exterior walls, excluding doors and windows, constructed of brick, stone, fibre reinforced cementitious board, or other masonry or material of equal characteristics in accordance with the City's Building Code and Fire Prevention Code material approved for use under a national model code published within the last three code cycles that applies to the construction, maintenance, or other alternation of a building provided the material conforms to local concerns that do not conflict with Section 3000 of the Texas Local Government Code, or 80 percent of the total exterior walls may be an exterior wall insulation and finish system product.

All buildings or structures in the "P-O", "CN", "HCO", "HC", "LB", "LI", "PCD", "PID", "CBD", "CC", and "RA" zoning districts shall be of exterior fire-resistant construction having at least 70 percent of the total exterior walls, excluding doors and windows, constructed of brick, stone, fibre reinforced cementitious board, or other masonry or material of equal characteristics in accordance with the city's building code and fire prevention code or material approved for use under a national model code published within the last three code cycles that applies to the construction, maintenance, or other alternation of a building provided the material conforms to local concerns that do not conflict with Section 3000 of the Texas Local Government Code, or 70 percent of the total exterior walls may be an exterior wall insulation and finish system product.

All buildings or structures in the "BP" zoning district shall be of exterior fire-resistant construction having at least 100 percent of the total exterior walls, excluding doors and windows, constructed of brick, stone, fibre reinforced cementitious board, or other masonry or material of equal characteristics in accordance with the city's building code and fire prevention code or material approved for use under a national model code as defined by Section 214.217 of the Texas Local Government Code published within the last three code cycles that applies to the construction, maintenance, or other alternation of a building provided the material conforms to local concerns that do not conflict with Section 3000 of the Texas Local Government Code, or 100 percent of the total exterior walls may be an exterior wall insulation and finish system product.

All principal buildings or structures in the "GU" zoning district shall be of exterior fire resistant construction having at least 70 percent of the total exterior walls excluding doors and windows, constructed of brick, stone, fibre reinforced cementitious board, or other masonry or material of equal characteristics in accordance with the city's building code and fire prevention code or material approved for use under a national model code as defined by Section 214.217 of the Texas Local Government Code published within the last three code cycles that applies to the construction, maintenance, or other alternation of a building provided the material conforms to local concerns that do not conflict with Section 3000 of the Texas Local Government Code, or 70 percent of the total exterior walls may be an exterior wall insulation and finish system product. Temporary buildings or structures used as classrooms for the Grapevine—Colleyville Independent School District may be exempt from this requirement.

Any buildings or structures located within a historic district or within a site that has received "HL" Historic Landmark Subdistrict designation are exempt from the requirements set forth in this section and must receive an approved Certificate of Appropriateness prior to exterior modifications to ensure exterior modifications keep with the architectural character of the district or landmark.

(Ord. No. 85-22, § 3(B), 5-21-85; Ord. No. 94-06, § 1, 1-18-94; Ord. No. 95-23, § 1B(Exh. A), 4-4-95; Ord. No. 98-29, § 1C, 2-17-98; Ord. No. 2003-84, § 1D, 12-16-03; Ord. No. 2011-33, § 1.H, 7-19-11; Ord. No. 2024-111, § 54, 12-17-24)