It also isn’t necessary to be so specific since the entire goal is to avoid mold and wood rot and other pests in the crawl space not really to target a set rH number. At some point theory and application have to come together, it is nearly impossible and inefficient to try to hit an exact relative humidity. We are giving a wider range of 55% to 75% rH. Monitoring the relative humidity to determine whether dehumidification is needed controlling humidity in the crawl space to less than 65 percent using ventilation, if outdoor air dew points are lower than 55 F, or with dehumidifiers.”Īs you can see, even in this post there is a little bit of variation in target crawl space humidity.Sloping the earth in the crawl space to direct water to a disposal location installing a vapor barrier over the earthen floor.“Preventing high-humidity conditions when crawl spaces are enclosed by the overhead floor deck by:.It matches up with guidance from the EPA on Foundation Construction to implement a moisture control plan to cover: We’ve been suggesting these steps for years. Setups and product selection will vary somewhat based on your crawl space needs and goals. ATMOX will use outside air when beneficial or use a dehumidifier to dry the crawl space. The third part is where the ATMOX products come in. The first two steps are important to address with your installer and important in controlling overall crawl space humidity. As outlined in our crawl space overview brochure, there are 3 steps to solving moisture problems in a crawl space.
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