My company has been installing synthetic and traditional stucco cladding on homes and businesses in the Southeast for more than 30 years. We’ve also installed a lot of acrylic-based exterior insulation and finish systems — or EIFS — but there was a period when I stopped recommending them to our clients. Although we hadn’t had any problems with our own installations, I had seen too much rotted OSB siding on other EIFS jobs to be confident that these systems were performing as well as they should (see “Installing Water-Managed Synthetic Stucco,” 9/98, for more on EIFS moisture problems). And that’s unfortunate, because EIFS is a great cladding option when done properly; it installs quickly and economically and puts the insulation where it provides the most benefit.
Then, a few years ago, I discovered Teifs WeatherTight VNT EIFS (Parex USA, 866/516-0061, teifs.com). This product makes it easy to get the details right, even over a potentially moisture-absorbent sheathing like OSB, so I’m once again enthusiastically recommending EIFS to my clients. The system features an acrylic water-resistant membrane...
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