SOLUTION

WJE performed a preliminary visual assessment of the building from interior spaces, accessible roof areas, exterior grade level, and an adjacent building. Additional visual assessment was completed from an aerial lift in conjunction with water infiltration testing. Prior to beginning the water infiltration testing, each test area was visually surveyed from the interior and exterior for conditions that may contribute to the water infiltration. Additionally, the interior walls and concrete roof slab were scanned with an infrared camera to confirm that areas near the testing locations were dry prior to testing.

Flood testing was performed on the gutter system and the interior spaces were then monitored for water infiltration. Nozzle testing was performed to diagnose the ability for the lead flashing under the coping stones to drain. Spray rack testing was also performed across the exterior wall assemblies. Based upon observations from the visual condition survey and water infiltration testing, WJE selected a portion of the gutter on the west side of the building as a location to remove the various layers of the box gutter system for observation of the as-built construction of the gutter and condition of each layer.

Based on the investigation, WJE provided conceptual repair recommendations to mitigate water infiltration into the roofing, exterior walls, and building interior.