Moisture can be the nemesis of today’s more tightly built wood-framed homes. Creating a tight building envelope is only one part of the equation in building a high-performing, energy-efficient house—if that’s not coupled with strategies for letting accumulated moisture out of wall cavities, it can be a recipe for disaster.
For years, the NAHB’s Building Product Issues Committee has tracked the adverse effects of unwanted excess moisture in homes. Most of the recurring themes have been identified to be specific to certain regions of the country and certain exterior claddings. Building code requirements have changed in response to the need for more robust weather-resistance performance of exterior envelopes. Product specifications and performance requirements have changed, as well. But it’s often hard to keep on top of all the code and technology changes that are happening in the industry.
Now, in a combined effort between the Forest Products Lab and the NAHB Research Center, there is a new online video resource to help builders avoid the pitfalls of inadequate moisture management in home construction. A series of “how to” videos was released in mid-January on the Research Center’s technical website www.ToolBase.org. The instructional videos focus on illustrating construction techniques that minimize moisture-related performance issues in the design and construction of wood-framed wall systems.
Like most of the resources on ToolBase.org, the videos are free to view and/or download. They are designed to be a quick, easy way for builders and contractors to get the information they want and need about code requirements, new technologies, and best building practices related to moisture management.
There are currently a total of 14 videos in four topic areas that help to breakdown all the steps necessary in avoiding moisture issues: 1) overview; 2) exterior wall system components; 3) the building science of heat, air, and vapor flow; and 4) quality management.
Visit www.toolbase.org/videos to see all the videos. And look for an additional chapter in the video series, “Floor Systems,” which is currently in development and will be added online this summer.