Spray Foam Insulation Does Not Control Crawl Space Moisture

Mold growing on crawl space floor joists.

Mold growing on crawl space HVAC ducting.

Sweating (or should I say raining) HVAC system in crawl space

So how old do you think this house is? 10 years, 5 years, maybe 2 years old.

Not even close- try 6 months! This customer was not so happy to find these conditions in the crawl space of their newly built home.

As discussed in my previous post, spray foam insulation on the subfloor does not address the main issue in a crawl space- moisture from the dirt beneath the home. The wood members in the crawl space are still exposed to ground moisture. There are only two primary ingredients needed for rot and mold to thrive: one is organic material, like the wood beneath a home, and the second is water.

Wood + Water = Mold & Rot

Also, because the crawl space is still vented, hot humid air is drawn into the crawl space causing the HVAC ducting to condensate. This creates more moisture, and more mold growth! Not only was the mold evident in this particular crawl space, but the air quality testing inside the home also revealed high levels of airborne contaminants.

So, the only avenue to preventing structural damage, condensation and poor indoor air quality is to eliminate the moisture by installing a CleanSpace Encapsulation System.