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MOLD INFORMATION CENTER
ALLERGEN TESTS for BUILDINGS
DO-IT-YOURSELF WARNINGS
FLOODS & MOLD CLEAN/PREVENT
MOLD ACTION GUIDE - WHAT TO DO
MOLD DETECTION & INSPECTION
HOW TO LOOK FOR MOLD
CHOOSE SAMPLE POINT
SAMPLING DRYWALL
SAMPLING MISTAKES
USE A FLASHLIGHT
WHAT MOLD LOOKS LIKE
Black Mold
Brown Mold Green Mold Red Mold
Yellow Mold
White Mold
Invisible Mold
Recognize Cosmetic Mold
Recognize Harmless Black Mold
ATTIC MOLD
BASEMENT MOLD
CARPET TEST GUIDE
CRAWLSPACE MOLD
HIDDEN MOLD, HOW TO FIND
Photo Guide to Finding Hidden Mold
Hidden Mold Behind Paneling
Spotting Hard-to-See Mold
Use of a flashlight to find mold
Wall test cuts to spot hidden mold
Light colored toxic molds
Moisture Gradients and Mold
Other Places to Look for Hidden Mold
INSULATION MOLD
ITCHY FABRICS
MOLD BY MICROSCOPE
MOLD ON DIRT FLOORS
MOLDY CARPETS
PHOTO GUIDE TO STAINS on Indoor Surfaces
STUFF THAT IS NOT MOLD
USING LIGHT TO FIND MOLD
More Information
Allergens:
How to Look For Mold
Mold Test Kits
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Green Mold in the Home - a Photo ID Library for detection and identification of mold allergens What toxic mold or other indoor mold looks like and stuff that's not mold but may be mistaken for mold MoldAPedia ©
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- 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 mold of various colors and textures in buildings
- Links to photos of stuff that is not mold or is harmless mold
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Our site offers impartial, unbiased advice without conflicts of interest.
We will block advertisements which we discover or readers inform us are associated with bad business practices,
false-advertising, or junk science. Our contact info is at
inspect-ny.com/appointment.htm.
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.
Also see Mold Related Illness: Index of Symptoms and
for an atlas of building molds and for more microphotographs of building mold samples observed in our laboratory, see
Mold Atlas of Indoor Clinical Mold, Pathogens, Allergens & Other Indoor Particles.
© Copyright 2008 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.
Photographs to Help Identify Mold in Buildings -
What mold looks like in a home or other buildings
Identification Photographs of Green Mold in Buildings

This photograph 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. |
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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 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.
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More Reading and photos to assist people looking for mold contamination in buildings:
WHAT MOLD LOOKS LIKE
MOLD IN HOMES
Black Mold
Brown Mold Green Mold Red Mold
Yellow Mold
White Mold
Invisible Mold
USING LIGHT TO FIND MOLD
MOLD BY MICROSCOPE
PHOTO GUIDE TO STAINS on Indoor Surfaces
CARPET TEST GUIDE
STUFF THAT IS NOT MOLD
HOW TO LOOK FOR MOLD
WHAT MOLD LOOKS LIKE
ATTIC MOLD what attic mold looks like, where to look
BASEMENT MOLD what basement mold looks like, where to look
CRAWLSPACE MOLD what crawl space mold looks like, where to look
MOLD ON DIRT FLOORS
MOLDY CARPETS how to look for mold under and on carpeting
HIDDEN MOLD, HOW TO FIND
INSULATION MOLD photo tour of other places to look for hard-to-spot mold
DO-IT-YOURSELF WARNINGS for mold investigators and homeowners |
WHAT MOLD LOOKS LIKE MOLD IN HOMES USING LIGHT TO FIND MOLD MOLD BY MICROSCOPE PHOTO GUIDE TO STAINS on Indoor Surfaces CARPET TEST GUIDE STUFF THAT IS NOT MOLD More Information
Allergens:
How to Look For Mold
InspectAPedia TM Home & Site Map Air Conditioning InspectAPedia Bookstore Electrical Environment Exteriors Heating Home Inspection Insulate Ventilate Interiors Mold Inspect/Test Plumbing
Water
Septic Roofing Structure Accuracy & Bias Pledge
Contact Us
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More Information on Finding and Identifying Mold in Buildings and Building Diagnostic Inspections and Repairs
- Looking for Mold Procedure: what mold is often found where in buildings - simple technical presentation
- How to Look For Mold, List of Articles: Hiring a Mold or IAQ Consultant, Getting a Remediation Plan
- Mold spores in the Home - a Photo ID Library for detection and identification of mold allergens
- Recognizing Allergens: What various indoor allergens look like - identification photos to help identify pollen, dust mites, animal dander, toxic or allergenic mold - Common Mold and other Allergens, Irritants, Remedies & Advice
- Stuff that is not mold but is often mistaken for it - things you may not want to test. Also, not all "black mold" is toxic - here are examples of harmless black mold.
- Allergens: what they look like in buildings
- Animal Allergens: Dog, Cat, and Other Animal Dander - Cleanup & Prevention Information for Asthmatics and regarding Indoor Air Quality.
- Mold in Fiberglass Insulation© 2005 comments about a field study in process, & more about health hazards from fiberglass insulation - DJF
- Mold Investigation Tips for Home Inspectors how to find mold, where to look, what is likely to be important. Advice to building inspectors intending to inspect or test for toxic or problematic mold indoors, mold inspection methods, and mold test methods which are valid or invalid
- Mold Test Kits - How to Collect and Send Your Own Mold Sample to our mold testing lab
- Meruliporia: the house eating fungus or "poria"
- Mold Central: indoor air quality investigation case histories, key links what to do about mold and indoor allergens - our Fear of Mold "Mycophobia" WebLog-Blog.
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
- Frequently Asked Questions About Mold -- check this FAQ list & IAQ Site Map to see if you can find a quick answer to your mold concern
The Mold Information Center: What to Do About Mold in Buildings, When and How
to Inspect for Mold, Clean Up Mold, or Avoid Mold Problems
Use this simple, economical mold test kit by following
our instructions on how to collect and mail mold samples to our lab
Environmental
Inspection, Testing, & Diagnosis On-Site IAQ, Gas, Air Testing, Mold Investigation, Sick Building Diagnosis,
Lab Services, & Remediation Plan Preparation - indoor air quality testing, problem source determination, supporting lab work, written remediation plan addressing
removal of environmental and other hazards and prevention of their recurrence.
InspectAPedia TM Home & Site Map - Building Inspection, Diagnosis, & Repair, Environmental Inspection & Testing - Research Website
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