Mold Testing

Mold testing allows for the identification of any mold types present in the sample taken. Air samples catalogue raw counts, extrapolated counts per cubic meter (concentration), and percentage of total fungi. Surface samples identify the types of mold present and growth concentration. An outside sample is always taken and, along with other concentration criteria, is used as a baseline for comparison against the samples taken in other location.

Types of samples:

  • Air Samples – Air Samples are collected with a precision vacuum pump and spore trap cassettes. Depending on the space being sampled, 30-75 cubic liters of air is drawn through the cassette and impacted onto a collection medium. The medium is then analyzed for types of mold present and quantity. Virtually all samples taken are going to show some levels of mold in the air; the samples determine if the levels in the space are normal or elevated as compared to the outside sample, which is taken as the baseline. Beyond the outside sample comparison, the data is also evaluated as to concentrations of particular molds known to cause health-related problems and also the percentage makeup on individual molds as compared to the total count.
  • Cavity Sample – Collected in the same manner as air samples, but with a tube connected to the end of the spore trap to allow a sample to be collected from within a wall or ceiling/floor cavity. These may be taken when a wall has high moisture content, has visible mold on the surface, or is suspect due to known leaks.
  • Surface Sample – Surface samples can be taken of any visible growth or suspected growth, such as on a wall/ceiling or HVAC ductwork. These can be helpful in determining if the visible mold is the source of elevated airborne counts or if it is a symptom of an underlying cause. Generally taken with a tape lift, surface samples will isolate the types of mold contained in the visible growth or suspected growth.
  • Samples are sent to an accredited laboratory for analysis and are available with one to two business days. In addition to the lab results, a summary report is generated detailing and explaining any concerns, and providing recommendations for corrective measures if necessary.


    If you are looking for Mold Testing services in Charleston, call GLS Engineering at 843-881-4803, or fill out our online request form.

Real Time Web Analytics