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 Vice President of Raths, Raths & Johnson responsible for oversight and consultation on projects involving architectural design, material and system application, building diagnostics, and forensics.  She has over 20 years of architectural experience which has included investigation, design review of building enclosures and assemblies, enclosure commissioning, construction administration, field testing, and repair design.  She specializes in water leakage investigations and resolution, as well as heat, air and moisture migration, including condensation formation.  She has knowledge and expertise in various computer modeling programs for enclosure evaluations, including THERM and WUFI, as well as other types of simulation software.

Her forensic experience, industry knowledge, and expertise include a wide range of building types, materials, and systems, including, but not limited to, roofing systems, fenestration systems, metal panels, stucco, wood, fiber cement and vinyl siding, and exterior insulation and finish systems (EIFS).  With her extensive building enclosure knowledge, she has provided litigation support, technical consultation, and served as an expert witness on related failures.  She is a frequent industry speaker and author on topics related to water leakage, condensation, as well as preconstruction and repair considerations.



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, GA, IN, IA, ME, MD, MI, MN, MO, NC, NY, OH, PA, 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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