GMM Webinar: Vapor Drive (HSW)
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GMM: Vapor Drive – How to control moisture in Hawaii and how the recent ICC updates will impact the design of building envelopes

When: Thursday, July 23, 2020
12:00 pm - 1:00 pm
United States
Contact: AIA Honolulu

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General Membership Meeting Webinar

Vapor Drive – How to control moisture in Hawaii and how the
recent ICC updates will impact the design of building envelopes

Moisture accumulation within roofs and exterior walls can come from many sources.  While wind driven rain usually comes to mind first, moisture built up through air transport and diffusion are just as common.  Vapor drive in Hawaii is almost always from the outside to the inside when the interiors are conditioned.  The transport of warm, moist air into the wall cavities can reduce insulation performance and provide one of the three elements to support organic growth. 

This seminar will address the new elements of the code to retard moisture transport and the general principles that should be incorporated into sound design of all exterior walls.


  • Colin R. Murphy, RRC, FRCI, LEED AP BD+C, PRA: Colin is the principal of Trinity | ERD, which he founded in 1986. He is a Registered Roof Consultant and a Fellow of IIBEC with degrees in Mechanical Engineering and Law (Scotland). He holds fourteen U.S. and European patents for roofing and building envelope systems. Colin is certified by the Exterior Design Institute as an EIFS Third Party Inspector and an EIFS Moisture Warranty Certified Inspector. He is also a LEED AP and an ICC Residential Building Inspector and a Commercial Building Inspector. Colin’s work includes forensic analysis of building envelopes, design of building envelope systems and the testing of building envelope components and systems.
  • Darbi Krumpos, CDT, BECxP, CxA+BE: Darbi was promoted to Vice President of Trinity | ERD in 2017. She graduated from Seattle University with a Bachelor of Science degree in Mathematics.  She is a Certified Documents Technologist through the CSI and is certified in Building Enclosure Commissioning with credentials from the University of Wisconsin.  Darbi has focused her project management skills on both public and private jobs and is a true problem solver, helping to define the client and project needs and communicating those needs to the entire team.  

AIA/CES LU: 1 AIA/CES (HSW) AIA Honolulu is the registered provider.

Cost: $10 for members and $20 for non-members. Registration is required.


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