SOLUTION

In support of the planned refurbishment of the exterior wall systems and assemblies, WJE provided peer-level, independent technical input and recommendations based on a document review and visual survey of portions of the facade. WJE also performed a visual inspection of the roofing to observe the condition of the membrane flashings, sheet metal counter-flashings, surfacing, and general condition of roofing-related elements.

To provide a more objective and qualitative assessment of the as-built construction and anticipated service life of the exterior wall systems and assemblies, WJE recommended performing a comprehensive survey from close range at both the interior and exterior sides of the exterior wall assemblies. WJE also suggested performing a series of infrared (IR) scans for potential air leakage and thermal bridging across the exterior wall assemblies and interfaces with adjacent construction. Site-detection air leakage and chamber testing at representative exterior wall conditions could then be performed to verify the results of the IR scanning and isolate areas of air leakage for in situ evaluation and repair. In order to develop a safe and effective approach to the cleaning and restoration of the exterior facade surfaces, WJE recommended identifying mock-up locations for the application of trial cleaning techniques intended to remove surface contaminants.