Sarah Flock


Vice President


Air Barrier

Building Sciences

Building Enclosures

Building Enclosure Commissioning (BECx)

Curtail Wall

Fenestration Systems

Hygrothermal Modeling

Moisture Intrusion

Roof Analysis


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Over 20 years of building enclosure investigations

Sarah Flock is a licensed Architect and a Principal at Raths, Raths, & Johnson, Inc. where she specializes in building enclosure investigations, the resolution of moisture intrusion, including condensation formation, as well as building enclosure commissioning (BECx).

Her experience has involved architectural peer review of building enclosures and assemblies to ensure the designs meet codes and standards for energy efficiency and environmental performance.  With her extensive building enclosure knowledge, she has provided litigation support and served as an expert witness on related failures.



Master of Architecture: Management, 2001
University of Illinois at Urbana-Champaign

Bachelor of Science in Architectural Studies, 1999
University of Illinois at Urbana-Champaign

Licensures | Certifications

Licensed Architect
IL, IN, IA, ME, MD, MI, MN, MO, OH, SC, and WI

National Council of Architectural Registration Boards
(NCARB) Certificate Holder

Construction Documents Technologist (CDT)

Building Enclosure Commissioning Process Provider (BECxP)

Commissioning Authority + Building Enclosure (CxA+BE)

Certified Third-Party EIFS Inspector

NFRC Trained in THERM and WINDOW

Health Care Construction Certificate (HCC)

Completed courses in Advanced WUFI and ASHRAE training regarding energy compliance standards

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