Water and air leakage, deterioration, and biological growth have occurred at and beneath parapet terminations against adjacent rise wall conditions that lack the proper integration of the air and moisture control layers. The problem is often due to the lack of one or more of the following: proper detailing, construction sequencing, trade coordination, and installation. Further contributing to the problem is the general lack of awareness and limited amount of industry recognized standards for design professionals and contractors to follow to develop designs that properly integrate the air and moisture control layers in a way that is constructable and provides durable designs.

While most designs incorporate two-dimensional details at parapet and roof-to-wall conditions, multi-step, three-dimensional details are also necessary to convey the design intent at complex interface conditions. Beyond design, specification, and installation, it is important to include saddling flashing conditions in construction sequencing and trade coordination, and construction mock-ups.

This presentation will discuss the design principles associated with the integration of control layers at complex interface conditions and using freehand sketches, paper folding, three-dimensional modeling, collaboration with trade personnel, industry associations, and manufactures, and mock-ups are useful tools in developing successful saddle flashing details.

1. Understand the importance of critical detailing of control layers at complex conditions to avoid air and water-related problems.
2. Learn effective ways to develop and design successful details at complex conditions that are constructable and durable.
3. Recognize the importance of considering construction sequencing and trade coordination when developing complex details.
4. Understand the importance of mock-ups for evaluating detailing, sequencing and performance testing to ensure water-resistant and airtight designs.