This crawl space was infested with active termites, wood rot, mold, and moisture damaged insulation. We started the project by removing all the fiberglass insulation.

This crawl space did not have a vapor barrier on the ground which caused the moisture issues to be much worse. Active termites, mold, and wood rot affected the majority of the floor joists and main support beams. As you can see, this main support beam is crushed into the pier it’s supposed to be laying on. The next picture shows a main support beam snapped right in the middle.

Using a high pressure sprayer, we sprayed the floor joists with an anti-microbial to take care of the mold. While it still may be visible in some places, the mold is dead and unable to produce new spores. The homeowner’s pest control company came in after to kill the active termites.

Since the floor joists and main beams were heavily affected by wood rot and termite damage, we sistered all existing floor joists with new floor joists and replaced all main beams with new steel i-beams. This brings structural strength back under the home and gives the homeowners peace at mind knowing their house is no longer breaking down beneath their feet.

After getting the floor system supported, we began work on the crawl space encapsulation.

An encapsulation is a system that creates a healthier environment  for the crawl space. It reduces moisture dramatically, creates warmer floors in the winter months, helps the house become more comfortable, and reduces energy bills.

The Drying Co./ThermalTec offers a few crawl space encapsulation options. Homeowners have the ability to choose their crawl space vapor barrier and what kind of insulation they would like on their foundation walls. For this crawl space, we sealed all the foundation vents from the inside with foam blocks and one part expanding foam. We then insulated the foundation walls with 2″ foam board. The foam board is attached to the walls with special fasteners and all seams are sealed with one part expanding foam. The foam board we use has a radiant barrier face to reflect indoor heat back inside. After installing the insulation on the foundation walls, we sealed and insulated the rim and band joist. Located right above the foundation wall, the rim and band joist is a known air leakage site that is uninsulated. We spray a two-part, closed cell expanding foam in this location to achieve an air barrier and moisture barrier.  For the crawl space floor, a new reinforced vapor barrier is laid down and sealed in place. Having a sealed vapor barrier means no moisture can come from the ground into the crawl space. The last piece to this system is a crawl space dehumidifier. Our powerful, energy efficient dehumidifiers are made specifically for crawl spaces. They use low amps and move high CFM (cubic feet per minute) of dry air that circulates around the crawl space.With low crawl space humidity, mold can never grow!


Here’s what we transformed this crawl space into!


If you have a vented crawl, don’t hesitate to give us a call. We’re the experts in crawl space mitigation.