3 Common Pitfalls of DIY Mold Testing Kits

8/29/2022 (Permalink)

Home mold testing kit

Mold Kits Are Subject To Some Big Problems

Some homeowners buy home mold testing kits as a budget-friendly alternative to a professional mold inspection. Others use these tests to confirm their suspicions about mold in their homes before they call the professionals. Before you buy a home mold kit, for any reason, you should be aware that these kits are subject to some big problems.

1. Test Samples Must Be Shipped to a Lab
A typical DIY mold kit comes with a petri dish. You leave the dish open in your home for a specified amount of time, then seal it, capturing any mold spores inside. Next, you ship the sealed petri dish to a lab for analysis. The shipping step is problematic because you have no control over the sample while it’s in transit. For example, your sample could be exposed to extreme heat or cold during shipping; since mold spores are sensitive to temperature, this could skew your test results. Furthermore, the glass slides in most mold testing kits break easily, even with protective packaging.

2. Lab Results Are Often Inconclusive
At the lab, scientists analyze your test sample and generate a report indicating the type and number of mold spores found on the slide. Unfortunately, there’s not much you can do with this information. The lab report can’t tell you key information, like:

• the density of mold spores in the air
• whether that density is considered hazardous
• the cause of the excess mold growth
  
  

3. Mold Kits Are Time-Sensitive
The Petri dishes in most home kits contain a testing medium called agar. Agar is inexpensive and widely available, but it has a limited shelf life. Many DIY mold tests do not have an expiration date or a manufacturing date, and you have no way of knowing how long a kit has been sitting on a store shelf in Ashmont, MA.
The problems inherent in home mold testing kits have led trade groups and consumer advocacy organizations to discourage homeowners from using them. Even the best DIY kit is not a reliable substitute for professional mold testing.