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Integrating sill pan window flashing can be challenging using block-frame windows or installing flashings within a recessed opening in a concrete wall. Two case studies summarize the details of design and retrofit installation for sill pan flashing of replacement block-frame window into the perimeters of existing recessed concrete wall openings. Provisions for sill pan drainage were included with technical solutions for two case studies. The design and detailing were also conceived to account for blending with the context of the existing architecture and minimizing the aesthetic concerns for the appearance of any exposed perimeter opening flashings. These case studies demonstrate detailing methodologies for wood and metal block-frame window frames and concrete wall openings applicable for new and existing exterior wall systems.
barrier-wall, block-frame window, concrete wall, design, detailing, flashing, recessed opening, reticulated foam weep, sealant joint, sill pan flashing, window
Staff Consultant, Simpson Gumpertz & Heger, Inc. (SGH), San Francisco, California