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(a) Exterior wall surfaces shall be of solid wood, or weather resistant materials not less resistant to moisture absorption than grade MW clay or shale brick as determined by ASTM C-62-97a.
(b) Any concrete masonry unit and mortar used in the construction of any part of any single-wythe exterior wall of any building containing a residential occupancy for which building plans have been submitted after the effective date of this ordinance:
(1) shall have integral water repellant included in the manufacturing process and all joist- mixed mortar shall have a compatible water repellant added to the mixture; and
(2) shall meet the “excellent” rating when tested in accordance with ASTM E514. Standard Method of Test for Water Permeance of Masonry.
Any concrete masonry unit or mortar used in the construction of any part of any multi-wythe exterior wall of any building containing a residential occupancy shall not be required to comply with the aforementioned provisions of this paragraph (b).
(c) Exterior walls constructed of concrete masonry units shall have flashing, weep holes, sealants and caulking which prevent the accumulation of water within the wall assembly and provide a means for draining water that enters the assembly to the exterior so as to prevent moisture from passing beyond the exterior wall cladding or veneer and entering the interior of the exterior wall.
(d) Wall anchors and metal veneers shall be of noncorrosive materials, or shall be protected by corrosive resistant treatment acceptable to the building commissioner.
(Prior code § 69-7; Amend Coun. J. 9-13-89, p. 4604; Amend Coun. J. 5-17-00, p. 32653, § 2; Amend Coun. J. 7-25-01, p. 64905, § 4; Amend Coun. J. 3-5-03, p. 104990, § 27; Amend Coun. J. 11-13-07, p. 14999, Art. II, § 1)