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What does yellow mold look like on 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 yellow mold and mushrooms 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 -
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 This photograph of thick yellow and pale yellow mold growth was taken of a mature mold colony in the basement of a home where rotting wooden stair supports had been subjected to recurrent flooding. |
 This photograph of thick yellow mold growth was taken of a bulk sample we collected from the surface of a rotting wooden 2x4 floor truss in a crawl space which had been subjected to recurrent flooding. |
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This floor structure was later cleaned using media blasting. |
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The spores and mushroom were not a hazard in the building but clues like this indicate a history of prolonged and severely wet conditions which mean that careful inspection of other areas was in order. |
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Clues like this indicate a history of prolonged and severely wet conditions which mean that careful inspection of other areas was in order, but we were also concerned with bacterial hazards in this case. |
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Photos at this link show Meruliporia incrassata wood damage, rhizomorphs, and yellow surface mold in buildings. This article also discusses Serpula lacrymans and some other confusing names for house-rotting fungi. |
This intense yellow mold on building wall paneling was easy to spot, and was symptomatic of chronic and severe wet conditions leading to extensive structural damage from rot. The fungus was identified in our lab as Meruliporia incrassata, or "the house eating fungus" which we discuss in more detail at the Meruliporia incrassata Web Page |
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
Use the specific article links above or on any of our web pages use the 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.
More expert information on this topic
Ozone Warnings - Use of Ozone as a "mold" remedy is ineffective and may be dangerous.
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.
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04/30/2008 - 01/01/1998 - www.inspect-ny.com/sickhouse/Yellow_Mold_Pictures.htm - © Copyright 2008-1998 Copyright Daniel Friedman All Rights Reserved
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