Integrated Water-Intrusion Management Solutions for Multifamily Properties

Single-source products for various facade options
Sponsored by TAMLYN
By Rebecca A. Pinkus, MTPW, MA
1 AIA LU/HSW; 1 AIBD P-CE; 0.1 IACET CEU*; AAA 1 Structured Learning Hour; AANB 1 Hour of Core Learning; AAPEI 1 Structured Learning Hour; This course can be self-reported to the AIBC, as per their CE Guidelines.; MAA 1 Structured Learning Hour; NLAA 1 Hour of Core Learning; NSAA 1 Hour of Core Learning; NWTAA 1 Structured Learning Hour; OAA 1 Learning Hour; SAA 1 Hour of Core Learning

Learning Objectives:

  1. Describe the relationship between rainscreens and water-resistant barriers (WRBs) in multifamily residential units, and how they add to the health, safety, and well-being of building occupants.
  2. Identify how new permeable WRBs integrated with drainage materials can be used with multiple siding/facade applications in a successful building envelope strategy that keeps moisture out and the indoor air quality safe for occupants.
  3. Explain the properties and benefits of using extruded aluminum trim on multifamily residential project exteriors.
  4. Discuss how extruded aluminum trim can complement an integrated water-intrusion management strategy for multifamily residential projects, and in so doing improve the overall health, safety, and well-being of occupants.

This course is part of the Multifamily Housing Academy

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When it comes to buildings, water intrusion is a huge challenge to manage. Multifamily residential projects present their own set of challenges, with designs that include a variety of different cladding materials. When different cladding materials are used, there can be a mismatch between WRB requirements (e.g., furring or not), which can cause problems with water intrusion. Several manufacturers have addressed this problem by creating integrated rainscreen and WRB systems that do not require furring. This means that the basis of the wall assembly will be consistent across the project—and that translates into improved moisture management.

Extruded aluminum trim can work into this integrated system as well. Trim provides design aesthetics to multifamily projects, all while enhancing the moisture management system by strategically draining water from the exterior down to the ground. Where the integrated rainscreen and WRB system can give architects the option to do one-stop shopping to protect the building assembly, extruded aluminum trim provides one-stop shopping for all of the details needed for the siding and facade materials. The trim can be used for each component on its own and for transitions (vertical, horizontal, or corners) between the components.

Advances in both integrated rainscreen and extruded aluminum trim systems offer architects and buildings increased confidence that all components of their moisture management system will work together, thus saving time and costs.


1Hanamura, Deborah. “Multifamily real estate trends for 2019 and beyond.” Building Design + Construction. 17 April 2019. Web. January 2020.

2Kesik, Ted J. “Moisture Management Strategies.” Whole Building Design Guide. 16 August 2016. Web. January 2020.

3Barger, Cary. “Understanding rainscreen wall systems.” Building Design + Construction. 13 December 2016. Web. January 2020.

Rebecca A. Pinkus, MTPW, MA, is a Toronto-based communication consultant, writer, editor, and historian of technology. She has been writing for the green build industry for several years and has contributed to more than 40 continuing education courses and publications through Confluence Communications.

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Originally published in Architectural Record
Originally published in March 2020