This presentation will review the various types of Hygrothermal modeling tools available to assistance designers in developing a building’s exterior enclosure. Variables such as the interior and exterior climate (temperature/humidity), material permeance, wall assembly types, and transitions between adjacent construction will be explored. Understanding the impact of the decision to use various modeling techniques such as 1D/2D/3D and transient versus static modeling will be discussed.

Learning Objectives

·       Participants will be able to define Hygrothermal Evaluation in the context of a building enclosure such as roofs and walls.

·       The participant will be able to distinguish between air and vapor tightness, and the code requirements for each.

·       The participant will be able to explain the importance of performing Hygrothermal evaluations in order to protect building materials from premature deterioration.

·       The participant will be able to describe the importance of performing Hygrothermal evaluations in order to protect occupants from the harmful effects of moisture related issues.

·       The participant will be able to recognize the importance of material properties of enclosure assemblies and their impact on the overall building performance.

Andrew Dunlap, AIA, NCARB, LEED AP

Senior Principal | SmithGroup Building Technology Studio Leader

Andrew Dunlap is a Senior Principal at SmithGroup and leads their Building Technology Studio.  His

primary work experience is in the analysis and development of building enclosures, specializing in the

evaluation of airtightness, hygrothermal performance, and energy efficiency.  His work includes

evaluating existing buildings, investigating problem buildings, revitalizing historic structures, and the

design and consultation of new and specialty facades.  He received his Bachelor of Architecture,

Bachelor of Science in Mathematics, and Master of Architecture degrees from the University of Detroit

Mercy.  He is a Past Chair of ABAA, the Co-Chair of the ABAA Research committee, and is the Chair of

ASTM’s Sub-Committee E06.55 on the Performance of Building Enclosures. He regularly provides

presentations and publications for several industry organizations and is an active member and

participant of the AIA, AGC-MI, ABAA, BEC, and ASTM.