Crawl Space Dehumidifier in Montgomery, AL

Crawl space dehumidifiers are the key to keeping encapsulated crawl spaces dry in

Montgomery, Alabama. Even with a vapor barrier, the air in a sealed crawl space can become

humid. A dehumidifier actively removes moisture, protecting floor joists and improving indoor

air quality.

Why a Dehumidifier Is Necessary

In a sealed crawl space, humidity comes from several sources: residual moisture in the soil, air

leaks from the living space, and diffusion through concrete or block walls. Without a

dehumidifier, relative humidity can climb above 70%, leading to mold and rot. A dehumidifier

maintains humidity below 55%, which is safe for wood and unpleasant for mold. Montgomery

Foundation Repair Co includes a dehumidifier in every full crawl space encapsulation.

Choosing the Right Dehumidifier

Not all dehumidifiers are suitable for crawl spaces. Standard portable dehumidifiers (from

hardware stores) are designed for basements and may not operate efficiently at cooler

temperatures. Crawl space dehumidifiers are built for continuous operation, have higher

moisture removal rates (pints per day), and can be drained automatically. Montgomery

Foundation Repair Co installs commercial‑grade dehumidifiers from brands like AlorAir, Santa

Fe, or AprilAire. These units are energy‑efficient and have remote monitoring options.

Installation Process

Installing a crawl space dehumidifier involves more than just plugging it in. We select a location

that allows proper airflow and access for maintenance. We mount the unit to avoid contact with

standing water. We connect a condensate drain line to a sump pump or gravity drain. The drain

line must have a trap to prevent sewer gases from entering. We also ensure that the crawl

space is sealed (vapor barrier, closed vents) so the dehumidifier doesn’t waste energy drying

outside air. Montgomery Foundation Repair Co performs all installation and provides a startup

test.

Maintenance and Lifespan

Crawl space dehumidifiers require regular maintenance. Clean the intake filter every 3‑6

months. Check the condensate drain for clogs. Inspect the unit for rust or corrosion. The

typical lifespan is 8‑12 years, depending on usage. Montgomery Foundation Repair Co offers

maintenance contracts that include filter changes and annual inspections. When the unit fails,

we can replace it with a newer, more efficient model.

Frequently Asked Questions