Lessons Learned From Restoration of Architectural Terra Cotta

Many historic buildings used mortar-set architectural terra cotta as decorative roof elements that relied on the terra cotta system as “waterproofing.” Such systems frequently leak or deteriorate over time due to ongoing water absorption, and require extensive repair or complete replacement in order to meet contemporary water infiltration and structural performance standards. Design of new/replacement terra cotta elements must include sound attachment to the structure and a secondary flashing system below. Thermal movement and future maintenance must also be considered. Through reference to multiple case studies, this presenter will outline the steps necessary to evaluate existing systems, design replacement systems, and successfully install architectural terra-cotta roofing.

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