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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
InspectAPedia TM Home & Site Map
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Electrical
Environment
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Home Inspection
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 Website en espanol
 Website en Francais
 Website en Portugese
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Red Mold spores & Yeasts in the Home - a Photo ID Library for detection and identification of mold allergens
What red mold or other indoor mold looks like and stuff that's not mold but may be mistaken for mold
MoldAPedia ©
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- Photos of red molds & yeasts in buildings - how to find & recognize mold on building surfaces
- Photographs of red mold & other molds of various colors and textures in buildings
- Photos of mold inside wall cavities and in insulation
- 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 red mold or red yeast 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 Red & Orange Molds & Yeasts in Buildings
 Red mold (actually a yeast), orange mold, on this wall to wall carpeting surrounded by more-obvious black mold. This red, orange, and tan mold was growing in spotty colonies on
the grade-level floor of this building which had been exposed to high humidity. The carpet had not been wet in this area
but other building leaks were nearby. Aspergillus sp. including some strains of Aspergillus versicolor, and yeasts such as Rhodotorula were present. |
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Red and orange molds and yeasts can be hard to spot on some surfaces because they are so often accompanied by other darker mold growths.
We find red molds and yeasts on the both the exposed and cavity side of drywall, on wall paneling, on building contents, on carpeting, on vinyl flooring, and on some other building materials.
We do not usually find red molds or yeasts alone, and in these photos you'll see that other mold genera/species are also present. |
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Red Mold/Yeast in a wall cavity: Red mold, such as some strains of Aspergillus versicolor, and red yeasts may form Important mold reservoirs inside building cavities. You won't see them without making a test cut in the right place. We decide where to make an invasive test cut by studying where leak or moisture problems have been or are likely to have been on a building.
This photo shows the hidden interior side of drywall on the test cut we made using the hole saw shown at the top of this page. The red material shown on the drywall paper in this photo was a yeast which accompanied toxic mold which we confirmed was present in this wall cavity. It doesn't look like much on this little 2" round plug, but the entire wall cavity interior was contaminated with this (and other) molds and yeasts.
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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
 Home Inspection Construction Consulting Services & advice for home buyers
 Contact Daniel Friedman for website content suggestions or for fee-paid consulting
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Building & Environmental Inspection, Testing, Diagnosis, Repair, & Problem Prevention Advice 
