Many crawl spaces have moisture problems. A vented crawl space that has a dirt floor is certain to be a damp environment where mold, mildew and even wood rot can easily take hold.
Even a crawl space with a concrete slab floor can be excessively damp.
Drying out this damp environment is a smart move, for your home's value and for family health as well.
Effective crawl space dehumidification can keep your crawl space dry enough to discourage mold growth and keep moisture-loving dust mites away.
The SaniDry CX® dehumidifier is designed to handle the tough moisture conditions in a crawl space. This photo shows a CX model that drains directly into a crawl space sump pump.
Building scientists (the experts who test and study how buildings perform under different conditions) recommend following two strategies to control crawl space moisture. First, the crawl space should be sealed or “encapsulated” to isolate the space from moisture in the soil and exterior air. The encapsulation process is completed using heavy-duty moisture barriers and covers for the crawl space access door and vent openings.
Sometimes the encapsulation process also needs to include a waterproofing system to prevent water from leaking into the space. Secondly, a crawl space dehumidifier is installed, if necessary, to dry out the air in the crawl space and maintain low humidity levels. The crawl space dehumidifier can drain into a crawl space sump pump (if there is one) or directly to the exterior.
For homes in colder climates, it's often advisable to integrate crawl space insulation with the encapsulation process. Installing special rigid foam insulation against crawl space walls keeps the crawl space warmer in wintertime, limiting condensation (and moisture accumulation) on cool surfaces. The added benefit of crawl space insulation is that the home becomes more comfortable and more energy efficient.
Most standard dehumidifiers available from retail outlets and home centers are not appropriate for use in a crawl space. The SaniDry CX® dehumidifier is designed to provide many years of energy-efficient, trouble-free performance, even in tough crawl space conditions. It drains automatically, so there is no reservoir to empty. The SaniDry CX meets stringent ENERGY STAR® requirements for energy efficiency, and it's precisely calibrated controls allow you to dial in the desired humidity level.
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