Job completed for Crawlspace Fungus Problem Solved: Encapsulation, Drainage, and Dehumidifier Upgrade

Completion date: April 28, 2025

Location: Huntsville, AL

Why did the customer contact us?

The homeowner reached out to us after discovering fungus growth throughout their crawlspace and becoming increasingly concerned about how it might affect their home and family. They had noticed a musty odor inside the living area and some discoloration on framing members visible from the crawlspace access, which prompted them to investigate further. Upon looking under the home, they saw widespread fungal growth on the floor joists, beams, and subfloor, and realized the issue was beyond a simple DIY cleaning. Worried about potential damage to the wood structure, as well as the impact on indoor air quality and long-term resale value, they contacted us to perform a professional inspection and provide a permanent repair solution for the crawlspace.

Solutions provided:

To properly address the fungus issue and prevent it from returning, we started by removing the existing crawlspace insulation, which was holding moisture and organic debris against the floor system and providing a food source for fungal growth. Next, we installed a drainage pipe system to direct any groundwater or intruding moisture toward a dedicated sump pump basin. In that basin, we placed a 1/3 HP sump pump and connected it to a discharge line that carries water safely away from the foundation, reducing the risk of future standing water under the home. To control humidity long-term, we installed a Sierra Watchdog NXT 85-pint dehumidifier, which works continuously to keep the crawlspace air dry and less favorable for mold and fungus. We also custom built a durable PVC crawlspace door to better seal the opening, helping keep out humid outside air and pests. Finally, we encapsulated the crawlspace with an R-5 insulated encapsulation system and a heavy-duty 15-mil floor liner, which covers the soil and walls to create a clean, insulated, and conditioned environment. Together, these steps not only addressed the existing fungal growth but also transformed the crawlspace into a dry, controlled space that protects the home’s structure and indoor air quality.

Team members on this project:

Matt Bagdonas, Rogelio Perez