Testing A Moldy Building

Photo of Sharol Tilgner
Photos of petri dishes with mold growing.

Where Do you Find Mold

Mold can be in your home, place of work or school. It can be in other buildings you frequent such as the homes of family or friends, the post office or your dentists etc. The Occupational Safety and Health Administration has identified more than 25% of the United States buildings as being water-damaged. I personally think it is more than that.

Air Tests

These can be used but they are of limited value. They give you a picture of what is in the air only at that moment in time. You do not get the complete picture as they give no information as to what takes place in a room over time. It also gives you information from only a small amount of air. You can get an air sample test returned with negative results when an ERMI test shows severe contamination.

Spore Traps are often used to get samples of spores in the aire. However, they will only identify particulates 3 microns or greater in size. They miss 99.8% of the particulates that are creating the innate immune inflammatory response of CIRS and making folks ill. The World Health Organization has said if spore traps are to be used they should be undertaken at multiplel times of the day, as well as multiple days of the week, as well as multiple weeks of the month and multiple months of the year in the same room. This is just crazy and shows what you would have to do to get a good sampling is not feasible.

Another issue with spore sampling is that it will not identify species of molds which is necessary to know if they are a species that is dangerous.

 

Mold Plates

Taking swabs of mold in a damaged area will help you identify the mold you can actually see. However mold plates do not give you the complete picture and miss any areas that you do not swab due to a lack of noticing them. These petri dish plates are sometimes used to catch spores in the air, but this is not a good way to know what is in your home.

 

Mold Tape Lifts

This is the best way to test for identifying mold that is actively growing. It is quite easy to do. If you have active mold growing in your home or on your furniture or other personal items and want to identify it, you can get a "Mold Tape Lift Test Kit". I would suggest the company EMSL. They will charge you $7.95 for the kit. If you send it back to them it will be another $75. If you decide to purchase a kit in one of the hardware stores that sell kits, make sure you know the company does a good job and check to see if the kit has an expiration date on it.

Here is a video on how to perform a tape lift test.

The Gold Standard for Mold Testing In A Building

The gold standard for identifying mold in buildings is a quanitative polymerase chain reaction test called ERMI. ERMI stands for Environmental Relative Moldiness Index and is available from Mycometrics or Forensic Analytical Labs. ERMI is an objective, standardized DNA-based method that will identify and quantify molds. It represents ongoing health risks for the occupants of the building. The ERMI test finds not just the mold spores, but fragments of them that are missed by other tests. This is important as the tiniest fragments will cause ill health in susceptible people. With the ERMI test you also know exactly what molds you are dealing with and the percentage of those molds that were found. Additionally, the known pathogenic molds are seperated out. The same company that provides the ERMI test also provides a tests called HERTSMI-2 This is a less extensive test but it can be helpful when you have remediated a damaged area and want to see if it is safe after remediation. It is not as extensive a test but it also costs less.

If you get a positive test, this identifies that you do have an issue and at this point you can get an inspector to identify where the source of past or present water intrusion is.

How the Occupant Collects A Sample

Dust is collected with a collection device on a vacuum cleaner or a special sanitary cloth. This is sent to a lab called Mycometrics where they use the PCR test to analyze the sample.

For details on the ERMI test, go to the company's website that performs the test.

Names of labs to consider:

Mycometrics.

Forensic Analytical Labs 

EMSL has a ERMI test, but they have sent me the link twice and it has not worked. For some reason I can't find data on their website as to how to order the test or what it costs, but I will list here their ERMI report sample  as they are well laid out and give links to additional useful data.

How to Find Mold

You think your building has a mold issue, but you don't see it. Perhaps you smell it or perhaps you are ill and suspect it is due to mycotoxins & other inflammagens.  it is necessary to find the damaged area so it can be remediated. You can hire someone to visually check your building and look for moisture with special tools. Sometimes it is hard for an inspector to find the water damaged area. If it is old and the building has dried, there can be offending mycotoxins but no moisture remaining in the wall, floor or ceiling. Finding stains is helpful but they are not always visible. The inspector must look under the house and in the attic. They must examine everywhere.

History of water damage from current inhabitants or past inhabitants is helpful to pinpoint the location of the damage. Have you had any plumbing leaks or breaks in the kitchen or bathroom? Look under and around sinks and bathtubs. Getting a water damage history of the building ready for the mold inspector ahead of time is very helpful in pointing them in the right direction.

For details on places that might be more likely to have water damage in your building, check out "Mold and Moisture Issues in the Home". You can also check out an article on "buying a mold free house" as it gives many specific tips on how to look for houses that are built in ways that are bound to end up being moldy. Knowing what these house traits are, will help you find issues with your house and either detect mold already there or prevent it in the future by fixing the issue.

This link will provide some various building inspectors and other services for finding mold.

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