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What does green mold look like on indoor building surfaces?
These mold spores and their photographs and examples of materials sometimes mistaken for mold have been collected
in the U.S., Spain, Mexico, France, as well as in other countries where I've studied bioaerosols.
These photos of mold on indoor building surfaces may help you recognize
mold in buildings, recognize probably-cosmetic mold, and recognize stuff that is not mold and does not need to be tested.
We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.
Photographs to Help Identify Mold in buildings -
What mold looks like in a home or other buildings
Identification Photographs of Green Mold in buildings
Among the 1.5 million mold species, there are quite a few that may be found in buildings and that are green or green-gray in color. Three very common indoor mold groups found indoors and that include visible green mold growth are some members of the Aspergillus sp., Penicillium sp., and Trichoderma sp. mold genera.
Green mold can be easily seen on building surfaces but it cannot be reliably identified to genera/species without analysis by a qualified aerobiologist/microscopist in a test lab.
Our photographs which follow show the typical appearance of green and gray-green molds on building surfaces indoors.
The photograph (above left) of thick green mold growth appearing on
plywood subflooring over a wet crawl space was taken at a vacation home located at the edge of a lake.
The combination of wet soils,
roof spillage against the foundation, and long periods of inattention subjected this house to water damage and problematic mold growth.
This photograph (above) of thick green mold growth was taken on cardboard boxes and contents stored in a basement closet subjected to not only leaks through a foundation wall but also recurrent basement flooding.
The presence of black mold and white mold on this box suggest that we may have at least three different genera/species of mold growing in this area.
You can also see tan colored mold on the wooden picture frame on which this box sits, and white mold growing on the cigar boxes at the lower right of the photo.
This photograph shows thick green mold growth on furniture, side-lit by our flashlight. the Green mold on furniture in a damp moldy basement, Aspergillus photo shown in thumbnail just below is a larger view of this item.
Our lab examination determined that this mold, which was quite green to the naked eye, also contained Aspergillus niger (a black mold in the microscope).
Interestingly this very moldy furniture had been in this (very wet) location only three weeks according to our client.
Green mold on drywall and cabinetry in a flooded basement, or blue-green mold is shown in this photograph. The mysteriously-sharp line marking the top edge
of this mold growth was very important.
Dissection of the wall showed that a 12-inch strip of drywall had been removed and replaced around the entire room perimeter. The mold growth line marked the cut edge and taped-over repair - and a change in moisture
levels of the materials which slowed mold spread above this point.
A previous owner had repaired previous water and flood
damage in this basement. This is an example of the exception to the general rule that mold growth tends to spread in a non-linear pattern over surfaces.
See Mold Atlas & Particles List for an atlas of building molds and for more microphotographs of building mold samples observed in our laboratory.
"A Brief Guide to Mold, Moisture, and Your Home", U.S. Environmental Protection Agency US EPA - includes basic advice for building owners, occupants, and mold cleanup operations. See http://www.epa.gov/mold/moldguide.htm
"Disease Prevention in Home Vegetable Gardens,"
Department of Plant Microbiology and Pathology,
Department of Horticulture, University of Missouri Extension - extension.missouri.edu/publications/DisplayPub.aspx?P=G6202
Fifth Kingdom, Bryce Kendrick, ISBN13: 9781585100224, is available from the InspectAPedia online bookstore - we recommend the CD-ROM version of this book. This 3rd/edition is a compact but comprehensive encyclopedia of all things mycological. Every aspect of the fungi, from aflatoxin to zppspores, with an accessible blend of verve and wit. The 24 chapters are filled with up-to-date information of classification, yeast, lichens, spore dispersal, allergies, ecology, genetics, plant pathology, predatory fungi, biological control, mutualistic symbioses with animals and plants, fungi as food, food spoilage and mycotoxins.
Carson, Dunlop & Associates Ltd., 120 Carlton Street Suite 407, Toronto ON M5A 4K2. Tel: (416) 964-9415 1-800-268-7070 Email: firstname.lastname@example.org. The firm provides professional home inspection services & home inspection education & publications. Alan Carson is a past president of ASHI, the American Society of Home Inspectors. Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The Home Reference Book & illustrations from The Illustrated Home. Carson Dunlop Associates' provides extensive home inspection education and report writing material.
The Illustrated Home illustrates construction details and building components, a reference for owners & inspectors. Special Offer: For a 5% discount on any number of copies of the Illustrated Home purchased as a single order Enter INSPECTAILL in the order payment page "Promo/Redemption" space.
TECHNICAL REFERENCE GUIDE to manufacturer's model and serial number information for heating and cooling equipment, useful for determining the age of heating boilers, furnaces, water heaters is provided by Carson Dunlop, Associates, Toronto - Carson Dunlop Weldon & Associates Special Offer: Carson Dunlop Associates offers InspectAPedia readers in the U.S.A. a 5% discount on any number of copies of the Technical Reference Guide purchased as a single order. Just enter INSPECTATRG in the order payment page "Promo/Redemption" space.
The Home Reference Book - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 25th Ed., 2012, is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume.
Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order. Enter INSPECTAHRB in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author.
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