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Mold: Causes, Health Effects and Clean-Up

Source: www.eere.energy.gov
Topic: Mold Spores
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Sort Desciption: Joseph Lstiburek, Ph.D., P.Eng. Nathan Yost, MD Terry Brennan, MS Mold requires water. No water, no mold. Mold is the result of a water problem. Fix the water problem. Clean up the mold. And you have fixed the mold problem. ...

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Mold: Causes, Health Effects and Clean-Up Joseph Lstiburek, Ph.D., P.Eng. Nathan Yost, MD Terry Brennan, MS Mold requires water. No water, no mold. Mold is the result of a water problem. Fix the water problem. Clean up the mold. And you have fixed the mold problem. To avoid mold problems, avoid water problems. Design and build in a manner that reduces water problems. Mold also requires food. The food it likes best is cellulose the more processed the better. Mold really likes wet paper. It kind of likes wet wood, but not as much as it likes wet paper. It likes processed wood better than it likes real wood. So mold likes oriented strand board (OSB) better than plywood and plywood better than a stud or a joist. Mold also likes the feces of cockroaches and dust mites, as well as some pastes, paints and adhesives. Just because something gets wet, it doesnt mean it will get moldy. It needs to be wet for a while. Wet paper needs to be wet for a couple of days. Wet wood, for a couple of weeks. And it also needs to be warm. Warm, wet paper that is wet for a while is a problem. Because it usually takes time for mold to grow, promptly drying the building after a water event will prevent a mold problem from developing. Of course, make certain that the underlying problem that caused the water problem is also corrected. There are always going to be water problems. But if you fix the water problems quickly enough you wont have mold problems. You want to be able to see a water problem right away if you have one so that you can fix it right away. Water problems that you cant see for a long time are the type of problems that lead to bad mold problems. For example, wet paper faced gypsum board that you cant see is a problem. Like from a small plumbing leak. Especially in an exterior insulated wall. Why an insulated wall? The insula tion reduces the ability of the water to drain and leak out so that you can see it. Also, the insulation r ...

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