The City of Austin established strict criteria for the building enclosure performance. SGH consulted on the below- and above-grade waterproofing, air barrier, vapor retarder, thermal insulation system, curtain walls, skylights, and roofing, including a low-slope membrane roof and standing seam metal roofing on the “cowboy hat.” Highlights of our work include the following:
Reviewed the proposed design and developed details to integrate the various systems
Recommended ways to protect interior space from air/water infiltration and minimize thermal losses at upper level reading areas around the perimeter that flow onto screened-in porches overlooking the lake
Developed creative curtain wall details to accommodate screen walls hung off the building
Collaborated with the design team to change the proposed pile-supported foundation to a mat slab foundation, which allowed for more reliable waterproofing protection against groundwater fluctuations due to the adjacent Lady Bird Lake
Provided construction administration services, including reviewing submittals and performance test reports, inspecting below-grade waterproofing and roofing, observing a mockup of above-grade wall systems, and observing construction to compare with the design intent
We also visited the building two years after the project’s substantial completion to a perform post-occupancy survey and evaluate the enclosure’s performance.