Chase A+EP is pleased to announce that ASTM International is considering significant revisions to E2128-20, the 2020 “Guide for Evaluating Water Leakage of Building Walls.”  If you are an architect or building contractor, or an attorney representing an architect or building contractor, as you know, these guidelines are part of the broader Standard of Care regulatory requisites upon which all projects are evaluated. Chase A+EP has been an expert witness, arbitrator and/or mediator on over 30 cases in which there has been a building envelope water intrusion issue.

How Might These Changes Impact You?

Definitions, reference documents, methods of water penetration resistance, critical material properties, critical details, workmanship, inspection, testing and evaluation will all potentially be upgraded soon. Go to for a copy of ASTM e2128-20 “Standard Guide for Evaluating Water Leakage of Building Walls” published December 2020, and contact ASTM for future developments. ASTM International sets the standards for over 12,000 global operations to secure and enhance performance and help people have confidence in the things they buy and use. David Erik Chase, AIA, President of Chase A+EP, is a licensed Architect, Florida Supreme Court Qualified Arbitrator, Florida Supreme Court Certified Court Mediator and East Coast American Arbitration Association Arbitrator offering Construction Dispute Resolution and Expert Witness services. Go to for more information or click here to get in touch with Mr. Chase.

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