How to Use Do-It-Yourself Toxic Mold Test KitsVANCOUVER, CANADA. Many homeowners, landlords, renters, property managers, business owners, and employees want to know, and need to know,
precise identities of
various toxic mold species inhabiting their home, rental property, or place of work, according to Phillip Fry, Certified Mold Inspector and author of
mold book Do-It-Best-Yourself Mold Prevention, Inspection, Testing, and Remediation.
To identify correctly toxic mold species, take these two steps: (1) use do-it-yourself mold test kits to collect mold samples during a thorough and complete building mold inspection and investigation; and (2) send
collected mold test samples to a mold laboratory for mold analysis and mold species identification. Testing Visible Mold Growth
If a resident or occupant sees mold growing on a wall, ceiling, floor, heating or cooling duct register, or any other surface, he can scrape mold particles off
mold growth area onto
sticky surface of
opened mold test kit.
During such scraping of
mold growth,
tester needs to wear rubber gloves and a full-face respirator mask with organic vapor filters (such as
3M brand from a large hardware, home improvement, or safety store) to protect against toxic mold exposure.
To do
scraping, use a new or thoroughly disinfected (with ethyl or rubbing alcohol) paint scraper. Disinfect
scraper after each individual sampling to remove any possible mold contaminants, and thus avoid mold cross-contamination in
sampling process from one sample location to another.
Print clearly and neatly on a large pressure sensitive label
property owner’s name,
property address,
precise test location at that address,
testing date, and
type of sampling method (“mold test kit settling”), time duration of
test (e.g., thirty to sixty minutes) along with
tester’s name and contact information.
The label should also include each individual test number, as listed on
mold chain of custody form, available free from
mold laboratory. Attach
label to
bottom of
mold test kit that contains that respective, numbered mold sample.
Mold Testing of
Indoor Air
Use a separate mold test kit to collect a mold sample from
air of each of these areas---
1. Heating/cooling duct register. Expose
sticky side of an open mold test kit (one for each duct register) to
outward airflow from each separate heating/cooling duct register. Tape
open test kit to
duct grill so that
airflow directly hits
sticky surface.
Run
heating/cooling system on fan ventilation for 10 minutes prior to removing
mold test kit from each tested duct register. Then close, seal, and label each mold test kit.
2. Room Air by
Settling Method. Mold test
air of each room, attic, basement, crawl space, and
garage by first running a cleaned fan to stir up each room or area’s air all around for about 15 minutes.
Thoroughly clean
fan blades and fan guard with rubbing alcohol or ethyl alcohol after
fan’s use in each separate testing location.
Then shut off
fan, open up a mold test kit, place it open side upwards in
middle of
room [on
floor, or upon a table or chair] for thirty minutes to one hour to allow airborne mold spores to settle down onto
sticky surface of
mold test kit.
Be sure to use
same time for all air test locations for
standardization of
mold test results. Then close, seal, and label
mold test kits.
3. Outdoor Mold Control Test. The mold lab results of
indoor mold tests have
most significance when
results of each indoor location’s testing can be compared with
results of
outdoor mold control test.