Should I have my house air tested for mold?

Why are molds a concern?
Is there a mold problem?
How can you tell if it is mold?
How much mold is growing?
How to clean mold?
Dealing with an ongoing mold problem.
Preventing mold.
Mold-Proofing your home, basement.
Mold-Proofing your home, bathrooms, kitchen, laundry.
Mold-Proofing your house, closets and bedrooms, exterior.
Should I have my house air tested for mold?
The air feels dry, can I humidify?
What advantages do HEPA vacuums provide?
Is vacuuming with a HEPA or externally exhausted vacuum cleaner recommended for serious mold problems only?
Where do you find a HEPA vacuum cleaner?

This is the question most frequently asked by homeowners who think their home may have a mold problem. Testing is generally not recommended for homeowners. Testing of moldy materials or an air sample identifies the types of molds that may be present but does not identify the cause/source of moisture. The type of mold does not change the procedures for cleaning up areas of mold less than 3 square meters. You have to clean up the mold and correct the problem irrespective of the type of mold. The cost of testing may be better spent hiring a professional investigator or fixing the problem.

Testing of a moldy material involves sending a swab, an imprint on a Scotch tape or a piece of the material to a competent laboratory. Air sampling requires specialized equipment. An air sample typically captures mold spores in a period of minutes. Since replicate samples must be taken due to variations in the airborne molds over time (even hours) and compared with outdoor samples, air testing is both expensive and time-consuming. Interpretation of test results may not be very useful, since there are no advocated "safe levels" of indoor molds and the results will not tell the health risks from the molds.