2025 BES Session: Drainage Efficiencies of Fiber Cement Panels (Doggett, Davis, Congleton)

Course Overview
This session was originally presented at the 2025 IIBEC Building Enclosure Symposium in St. Louis, Missouri.  This course includes the following components:

• recording of the live session
• a summative assessment consisting of 10 multiple-choice questions
• two surveys required to claim continuing education credit

Description

Building codes now prescribe minimum drainage spaces for distinct cladding types. The intent is to provide a more efficient release of water that has penetrated beyond the cladding. Compliance is also achieved with proven drainage efficiencies as tested in accordance with ASTM E2273. One prevailing assumption is that gap size and drainage efficiency are inexorably linked. However, this notion is challenged by the advent of drainage wraps and other products offering smaller yet efficient drainage spaces. This session will examine drainage efficiencies of full-scale test walls configured with fiber cement panels and gap depths of 10 mm or 1.5 mm. Key considerations including variances in water application rates and the effects of moisture absorption at drainage interfaces will be discussed. The fate of residual water within the drainage space is further explored with hygrothermal simulations for multiple North American climates.

Presenter/Author

M. Steven Doggett, PhD

Principal Materials Scientist

Built Environments

Steven Doggett is the founder of Built Environments Inc., a building science research firm with a special focus on resilient enclosure systems. His practice draws from extensive experience with building enclosure failures, particularly those involving air, heat, and moisture transport. He merges this expertise with durable design practices, novel test methods, and advanced simulation techniques. Doggett’s primary work centers on research and development of high-performance building products. He is actively engaged in product evaluation, testing and failure analysis, and development of innovative building materials.

Presenter/Author

Jarrett Davis, AMB, CGP, CDT, LEED AP BD+C
Principal Building Scientist
Built Environments

Jarrett Davis has been involved with evolving and facilitating the change of the built environment around the globe, while maintaining the attitude required for high performance construction, design, and execution. Often found speaking to trade associations, Architects and Engineers, and frequently lecturing to college classrooms on the Building Sciences and construction measures. He has been engaged by product manufacturers to develop extensive R&D, testing, and installation manual procedures and systems for acceptance in the construction industry. But you can usually find him in the air teaching his kids how to fly and understanding physics at work.

Author

Mathew Congleton

Project Engineer

Built Environments

Working as a technical specialist and project engineer for Built Environments, Mathew Congleton draws upon years of experience in the disaster response industry as an insurance adjuster, loss consultant, and damage appraiser. After personally witnessing the aftermath of catastrophic weather events such as hurricanes, tornados, floods, and wildfires, he understands the vulnerabilities inherent in building structures and the need for resilient design. This firsthand experience, coupled with a degree in construction management, and certifications such as the Insurance Institute for Business & Home Safety Fortified Evaluator designation, has equipped him with a detailed grasp of building science principles.

Course Access
Courses are accessible in LearnUpon for one year from the date of purchase.

Course Recommended Prerequisite(s)
An understanding of basic building science as well as general familiarity with wall design and drainage test methods.

IIBEC Core Competencies: Exterior Walls (EW)

Knowledge Level: Intermediate

Disclaimer
The views and opinions expressed in the session content at the 2025 IIBEC Building Enclosure Symposium are those of the content author(s)/speaker(s) and do not necessarily reflect the policies or positions of the International Institute of Building Enclosure Consultants (IIBEC). IIBEC makes no warranty, whether express or implied, as to the completeness, accuracy or validity of the information provided.

Credit Start Date 5/22/2025          
Credit Expiration Date  5/22/2028

Continuing Education Credit Statement
This course is approved for 1.0 IIBEC CEH
This course is approved for 1.0 AIA LU/HSW
AIA Course Number: BES25_17_OD
AIA Provider Number: G024

Continuing Education Credit Claim Information

To claim IIBEC CEHs, learners are required to:

• Achieve a passing score of 70% on the summative assessment (learners are provided unlimited attempts)
• Complete the course Evaluation & Attestation Survey

After completing the Evaluation & Attestation Survey, learners will be able to download a Certificate of Completion.  Learners are responsible for self-reporting IIBEC CEH credit by uploading their Certificate of Completion to their IIBEC Portal. For assistance in self-reporting CEHs, please reach out to: [email protected]

To claim AIA LU, learners are required to complete the above requirements, as well as:

• Complete the AIA Survey (AIA member number is required)

AIA continuing education Learning Units earned upon completion of this course will be reported to AIA CES for AIA members.

AIA CES Provider statement

IIBEC is a registered provider of AIA-approved continuing education under Provider G024. All registered AIA CES Providers must comply with the AIA Standards for Continuing Education Programs.  Any questions or concerns about this provider or this learning program may be sent to AIA CES ([email protected] or (800) AIA 3837, Option 3).

This learning program is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. AIA continuing education credit has been reviewed and approved by AIA CES. Learners must complete the entire learning program to receive continuing education credit. AIA continuing education Learning Units earned upon completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.