Crawl Space Inspection

Many homeowners do not relish spending time in the space underneath their home, but it is crucial for the safety and health of the occupants that someone -preferably an expert- assesses the status of your crawl space. Environmental Solutions Group has multiple experienced and knowledgeable investigators on staff that can help homeowners with regular crawl space checkups. 

The summer and spring months are the best time for a crawl space inspection; the air conditioning system will most likely be in use, and mold is most active in the warm weather. It’s important to note that some mold on the floor system of your home is normal and to be expected. This is especially true if your crawl space is an ‘open’ design with foundation vents that allow outdoor air into the space. Some mold under the house may be defined as a ‘normal fungal ecology.’


If you are concerned that your floor system has mold on it and want to know if something needs to be addressed, you may want to call in an expert to take a look. At ESG, we perform the following steps during our thorough crawl space inspection:

  • While wearing protective gear, we explore the entire underside of the house and document conditions with photos of the vapor barrier, foundation walls, floor insulation, joists/sub-floor, and any mechanical equipment (especially the HVAC air handler & duct work)
  • We collect wood moisture measurements of several joists and the sub-floor, especially near plumbing penetrations and near the foundation if moisture is observed
  • We check the vapor barrier for tears or gaps that could allow soil moisture to evaporate on the floor system
  • We note any strong musty odor (A crawl space should smell earthy, not musty)
  • We observe any debris that should be cleaned up, such as old pipes, insulation, or duct work lying on the floor
  • We detect the level of air movement through the crawl space. In larger crawl spaces, We often find a dead zone near the center, which is usually home to more than typical amount of fungal growth.
  • We may collect a surface sample for lab analysis to determine what type of mold, if any, is present

ESG will then provide a report that includes a list of observations and recommendations. 


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