10.030.0733 Cornice and parapet rebuild | Terra cotta, extruded

This detail illustrates a modern rebuild strategy for replacing existing architectural terra cotta (TC) cornice, balustrade parapet, and accessory units. The existing TC is replaced with new extruded TC units, installed not filled, with weep holes at the underside of each overhanging unit; each secured with new stainless-steel anchorage. In restoring and rebuilding these types of historic wall systems, moisture mitigation is critical to their long-term preservation and performance. Moisture management measures in this detail include horizontal skyward-facing joint treatment of sealant or lead T-caps, an integrated flashing system installed in the cornice, and stainless-steel through-wall flashing under the coping. The flashing system in the cornice includes a self-adhering flashing secured by a termination bar with continuous sealant, a stainless-steel drip edge, and weeps in the vertical joints. Accessible existing structural steel is also protected by cleaning and coating with a corrosion-inhibiting coating. These TC rebuild details illustrate general best practices. Specific project conditions, configuration, and details will vary and shall be determined by the design professional.

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