Green Mold in the Home - a Photo ID Library for detection and identification of mold allergens

Green Mold - Photographs of green mold in buildings - how to recognize mold
- Photographs of green mold in buildings assist in spotting problem mold growth in attics, basements, and in the living area
- Photos of green mold of various green shades/colors and textures in buildings
FIND MOLD in buildings, HOW TO - home
HIDDEN MOLD, HOW TO FIND - separate article
MOLD APPEARANCE - WHAT MOLD LOOKS LIKE - separate article
Questions & Answers about green colored mold contamination in buildings
References

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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.

For an atlas of building molds and for more microphotographs of building mold samples observed in our laboratory, also see Mold Atlas of Indoor Clinical Mold, Pathogens, Allergens & Other Indoor Particles.

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 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 furniture in a damp moldy basement, Aspergillus sp.

Green mold on basement drywall sheetrock sheet rock - Daniel Friedman
04-11-01 Green mold on drywall 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.

See our Atlas of Mold Related Illness Symptoms & Complaints for details about specific mold genera/species and their health effects.

Also see Mold spores in the Home - a Photo ID Library for detection and identification of mold allergens on indoor building surfaces.

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Technical Reviewers & References

Related Topics, found near the top of this page suggest articles closely related to this one.

Atlas of Mold Related Illness: Index of Symptoms and health, physical, neurological, psychological, and other complaint which people suspect may be mold or building-related.
Atlas of Indoor Mold, Online Clinical Mold Atlas, Toxins, Pathogens, Allergens and Other Indoor Particles - Medical Health Effects of Mold (separate online document)
Black Mold that is Harmless Photos of recognizable, usually harmless black mold on wood, bluestain, ceratocystis, ophistoma
Building Floods: quick steps after a building flood or plumbing leak can prevent costly mold contamination
Classes of Mold: what types of cosmetic, allergenic, or toxic mold are a problem? Can mold be cleaned-up successfully?
Clinical Mold References - Detailed bibliography of mold reference texts
"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 Program for Certain Vegetable Crops," David B. Langston, Jr., Extension Plant Pathologist - Vegetables, University of Georgia (PDF document) original source: www.reeis.usda.gov/web/crisprojectpages/209797.html
"Disease Prevention in Home Vegetable Gardens," Patricia Donald, Department of Plant Microbiology and Pathology, Lewis Jett
Department of Horticulture, University of Missouri Extension - extension.missouri.edu/publications/DisplayPub.aspx?P=G6202
"Management of Powdery Mildew, Leveillula taurica, in Greenhouse Peppers," Ministry of Agriculture and Lands, British Columbia - Original source: www.agf.gov.bc.ca/cropprot/peppermildew.htm
Environmental Health & Investigation Bibliography - our own technical library on indoor air quality inspection, testing, laboratory procedures, forensic microscopy, etc.
Fiberglass: Mold in Fiberglass Insulation© 2005 comments about a field study in process, & more about health hazards from fiberglass insulation - DJF
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.
Fungi, Identifying Filamentous, A Clinical Laboratory Handbook, Guy St-Germain, Richard Summerbell, Star Publishing, 1996, ISBN 0-89863-177-7 (English) (buy at Amazon)
Looking for Mold Procedure: what mold is often found where in buildings - simple technical presentation
Meruliporia: the house eating fungus or "poria"
Mold Action Guide: Step-by-Step Instructions, What to do about mold, mildew, and other indoor allergens
MOLD APPEARANCE - WHAT MOLD LOOKS LIKE Photos of what mold looks like in buildings
MOLD APPEARANCE - STUFF THAT IS NOT MOLD Photos of NOT-mold material that is sometimes mistaken for mold
MOLD ATLAS & PARTICLES INDEX, Pathogens, Allergens and Other Indoor Particles - Medical Health Effects of Mold (separate online document)
MOLD BY MICROSCOPE Mold under the microscope - photo identification of the most common indoor molds found in buildings
Mold FAQs Answers to Most Questions about Indoor Mold, Mold Related Illness, Mold Cleanup, Mold Prevention
US EPA: Mold Remediation in Schools and Commercial Building [Copy on file at /sickhouse/EPA_Mold_Remediation_in_Schools.pdf ] - US EPA
Mold spores in the Home - a Photo ID Library for detection and identification of mold allergens
Mold Test Kits - How to Collect and Send Your Own Mold Sample to our mold testing lab or to any mold lab you wish
Most Common Indoor Molds Found in buildings, A Table of
Mycology, Fundamentals of Diagnostic, Fran Fisher, Norma B. Cook, W.B. Saunders Co. 1998, ISBN 0-7216-5006-6 (buy this book at Amazon)
Ozone Warnings - Use of Ozone as a "mold" remedy is ineffective and may be dangerous.
Rot concerns in buildings-some building mold such as Meruliporia incrassata "Poria" risks serious rot and hidden structural damage
US EPA: Una Breva Guia a Moho - Hongo [Copy on file as /sickhouse/EPA_Moho_Guia_sp.pdf - en Espanol
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Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair

Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.

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.

Or choose the The Home Reference eBook for PCs, Macs, Kindle, iPad, iPhone, or Android Smart Phones. Special Offer: For a 5% discount on any number of copies of the Home Reference eBook purchased as a single order. Enter INSPECTAEHRB in the order payment page "Promo/Redemption" space.

Building inspection education & report writing systems from Carson, Dunlop & Associates Ltd

Environmental Health & Investigation Bibliography - our technical library on indoor air quality inspection, testing, laboratory procedures, forensic microscopy, etc.
Adkins and Adkins Dictionary of Roman Religion discusses Robigus, the Roman god of crop protection and the legendary progenitor of wheat rust fungus.
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Photographs to Help Identify Mold in buildings - What mold looks like in a home or other buildings