How to Collect Physical Mold Growth Samples for Low-Cost Mold Laboratory Identification of Mold Species
VANCOUVER, CANADA. Many property owners, apartment landlords, renters, employers, and employees want to know, and need to know, the precise identities of the various mold species infesting their moldy house, rental unit, or place of employment, according to Phillip Fry, Certified Mold Inspector and author of the book Do-It-Best-Yourself Mold Prevention, Inspection, Testing, & Remediation.
The accurate identification of mold species requires two steps: (1) physical collection of mold samples from the moldy building; and (2) mold laboratory analysis of the collected mold samples.
The least costly way to collect mold samples is the do-it-yourself approach carried out by gathering actual samples of mold growth to submit for mold laboratory analysis ($20.00 or more fee per sample analyzed).
Bulk Physical Mold Sampling
If a property owner 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 the mold growth area into a small ziplock bag. Collecting such a physical sample is "bulk mold sampling" or "physical mold sampling."
During such scraping of the mold growth, the tester needs to wear rubber gloves and a full-face respirator mask with organic vapor filters (such as the 3M brand from a large hardware, home improvement, or safety store).
To do the scraping, use a new or thoroughly disinfected (with ethyl or rubbing alcohol) paint scraper. Disinfect the scraper after each individual sampling to remove any possible mold contaminants, and thus avoid mold cross-contamination in the sampling process from one source or location to another.
Print clearly and neatly on a large pressure sensitive label the property owner's name, the property address, the precise test location at that address, the testing date, and the type of sampling method ("bulk sample"), along with the tester's name and contact information.
The label should also include each individual test number, as listed on the mold chain of custody form, available free from the mold laboratory. Attach the label to the ziplock bag containing that respective, numbered mold sample.
Alternatively, the tester can scrape the mold particles directly into a mold test kit (Petri dish) to start the growing ("culturing") of the mold sample. This "viable testing" growth process takes 5 to 7 days for accuracy in mold species identification.
The tester can then either watch the test kits for mold growth, or send the mold test kit to the mold lab immediately, or after the self-observation growth period.
Another bulk physical sampling technique is to cut out a small section (no larger than 2 inches by 2 inches) of a building material or home furnishing that contains significant mold growth. Then, put that cut piece into a small ziplock bag, or press firmly the moldy side down into a mold test kit. Follow the same labeling instructions explained above.
Examples of moldy materials from which bulk samples can be cut for mold lab analysis are wood timbers, drywall, plasterboard, wallpaper, ceiling tile, carpeting, padding, heating/cooling system filters, clothing, furniture upholstery, and any other favorite mold food.
Scotch® Brand Tape Lift Sampling
The easy steps involved in tape lift sampling to collect physical bulk mold samples are---
1. Cut a three-inch (3") long strip of one-inch (1") wide, transparent sticky tape, such as Scotch® Brand Tape.
2. While wearing rubber gloves and a breathing respirator mask (with organic vapor filters) from the local hardware or home improvement store, press the tape strip firmly (sticky side down) onto the visible mold growth or onto the surface being tested.
3. Remove (peel back) the tape from the surface.
4. Open up a small ziplock bag (a transparent, easily sealable plastic storage bag), and press lightly the lift tape sample sticky side onto the inside sidewall of the ziplock bag.
5. Close [zip shut] the ziplock bag completely. Tape it shut if necessary to make sure no airborne mold spores can escape.
6. Attach to the outside of the ziplock bag a large adhesive label with the same types of sample identification information specified above, except that the type of sampling method is "lift tape sampling."
For more information about bulk physical mold sampling, lift tape mold sampling, mold laboratory analysis, and mold species identification, please visit:
http://www.moldlab.biz
http://www.moldinspector.com
http://www.moldmart.net
Mr. Phillip Fry is a Certified Mold Inspector and a Certified Mold Remediator. He has written Mold Health Guide and DIY Mold Prevention, Inspection, Testing and Remediation. He has also co-authored the ebook Mold Legal Guide.
![]() |
|
![]() |
|
![]() |
|
![]() |
The first part of most years brings a flurry of... Read More
In this fast moving world of the 21st century, we... Read More
Modern shower stalls look sleek and stylish. If you have... Read More
Are you ready to starting building your dream home. House... Read More
You have just installed hardwood flooring in your home. Now... Read More
Does the coming winter chill remind you how much you... Read More
"Dr. Carl Sagan once wrote, "Somewhere, something incredible is waiting... Read More
Buying a new mattress is a daunting task that few... Read More
One of the most important principles to understand when designing... Read More
Many of us know that solar energy is a good... Read More
The purpose of a home ventilation system is to maintain... Read More
How to Collect Physical Mold Growth Samples for Low-Cost Mold... Read More
I recently visited friends who served me a dinner of... Read More
Choosing an asphalt paving contractor can be a major event... Read More
Newcomers to the world of log homes will notice that... Read More
Creating a Designer Home With LightingTraditionally, spring is the time... Read More
Circuit Breakers are devices that stop the electrical current of... Read More
Small is beautiful and convenient and so is the portable... Read More
You can't opt out of the process altogether, though, because... Read More
Installing a pre-cast concrete stairway to your home's basement is... Read More
Ceramic Tile brings a texture, richness and color to a... Read More
Hygienic air is essential to human life, and in this... Read More
This week we are going to continue our series on... Read More
Real wood furniture is the most popular furniture in existence.... Read More
Buying a home is a big and important investment for... Read More
Just two words and a bit of explanation about them... Read More
Many do-it-yourselfers pride themselves in their handiwork, you can just... Read More
In bathroom terms at least, bigger doesn't have to be... Read More
Razing the CottageWith new house plans and permits in hand,... Read More
Asphalt paving or Hot Mix Asphalt is typically what one... Read More
It's easy to get overwhelmed trying to figure out just... Read More
This story was told to me by a plumber I... Read More
For some people, a fireplace might as well be a... Read More
"What they don't tell you about Honda Pressure Washers"I recently... Read More
Putting the right comforter on your bed can make the... Read More
Remember the old Calgon commercial-"Take me away Calgon!" There's only... Read More
The purpose of a home ventilation system is to maintain... Read More
This report is about taking a house and restoring it... Read More
Would you like to add a personal touch to your... Read More
From a riot of color in bold chintzes to the... Read More
Family fun is one of the most important things you... Read More
You have decided to make the plunge and begin to... Read More
It's amazing -- some people manage to get a complete... Read More
Your choice of bathroom cabinet can affect the look and... Read More
Remodeling a kitchen is one of the best investments a... Read More
A Complete manual on how to install a Ceiling Fan... Read More
Don't you just love the design of some of these... Read More
Most of us enjoy daydreaming about our perfect home. Do... Read More
If the decision of what type radiant heating system to... Read More
If you've ever had carpets or vinyl flooring you've probably... Read More
Babies, babies, babies-yes the topic of this article is based... Read More
Before getting your house valuated think about the list below... Read More
How many of you have experienced this situation? As the... Read More
Over the years, many studies have been done in countries... Read More
The last thing you would think about when you are... Read More
According to the National Candle Association (NCA), most US-manufactured candle... Read More
Careful planning is the key to a successful bathroom-remodeling project.... Read More
It's that time of year where rats and mice are... Read More
The Ins and Outs Of Choosing Online Custom Home Plans!... Read More
Not many years ago, the thought of working from home... Read More
There are many styles of picnic tables on the market,... Read More
Log Cabin Homes: They have come a long way. Here... Read More
Hardwood flooring has a timeless air of qualityHardwood floors have... Read More
It is important to prepare a budget for your kitchen... Read More
Imagine leaving a window open all winter long -- the... Read More
If you just love that rustic look, and are finally... Read More
Home Improvement |