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MOLD: A COMPLETE GUIDE to TEST CLEAN PREVENT
AIR CLEANER PURIFIER TYPES
AIR FILTERS for HVAC SYSTEMS
AIR POLLUTANTS, COMMON INDOOR
AIR QUALITY IMPROVEMENT STRATEGIES
ALLERGEN TESTS for BUILDINGS
ANIMAL ALLERGENS / PET DANDER
ANIMAL ODORS IN BUILDINGSS
ATTORNEYS and EXPERT WITNESSES
BIBLIOGAPHY ENVIRONMENTAL HEALTH, MOLD, IAQ
CAR MOLD CONTAMINATION
CARPET DUST IDENTIFICATION
CARPET MOLD CONTAMINATION
CAT DANDER in BUILDINGS
COMBUSTION GASES & PARTICLE HAZARDS
CONDENSATION or SWEATING PIPES, TANKS
CPSC Indoor Air Pollution Book Online Copy
DUCT SYSTEM & DUCT DEFECTS
EMERGENCY RESPONSE, IAQ, GAS, MOLD
FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FLOODS IN BUILDINGS-mold
GAS EXPOSURE EFFECTS, TOXIC
HUMIDITY CONTROL & TARGETS INDOORS
HOUSE DUST ANALYSIS
INDOOR AIR QUALITY IMPROVEMENT GUIDE
MILDEW REMOVAL & PREVENTION
MOISTURE CONTROL in BUILDINGS
MOLD GROWTH on SURFACES, TABLE OF
MYCOPHOBIA, STAINS MISTAKEN for MOLD
NOISE / SOUND DIAGNOSIS & CURE
ODORS GASES SMELLS, DIAGNOSIS & CURES
OZONE for MOLD OR ODORS
RADON HAZARD TESTS & MITIGATION
SAFETY HAZARDS GUIDE
SICK HOUSE IAQ QUESTIONNAIRE
SMELL PATCH TEST to Track Down Odors
STAIN DIAGNOSIS on BUILDING INTERIORS
VENTILATION in BUILDINGS
Mildew mistakes: this article discusses how to recognize building mold and how to know that indoors, it's not mildew. We include photographs of a variety of white and green mold growths on clothing, leather, artworks, baskets and building surfaces - all examples of light colored molds that are not mildew (and that are potentially more harmful). This article describes building mold (black mold, green mold, yellow mold, gray mold, and white mold) that is often mistaken for mildew. At Distinction between "mold" and "mildew" on books we discuss more aspects of the difference between mildew and other molds, and why that difference matters.
Also see the photos at MILDEW in buildings ? and see MILDEW REMOVAL & PREVENTION (what to do about mildew). Readers who need to cure or prevent efflorescence, mold or "mildew" in buildings should see STAIN DIAGNOSIS on BUILDING INTERIORS, and MOISTURE CONTROL in buildings as well as HUMIDITY LEVEL TARGET also VENTILATION in BUILDINGS and WATER ENTRY in buildings.
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Photographs of Mold Found on or In buildings, Building Contents, Clothing, Baskets, & Artworks: Molds that are Sometimes Mistaken for Mildew
Here are photographs of mold on building exteriors, interiors, or building contents. At this website, other 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.Often an inexperienced mold inspector or consumer may refer to these molds incorrectly as "mildew". There are mold genera or species that can grow on a remarkably wide range of organic materials that are found both outdoors and inside, and that can appear in an wide range of colors (black, brown, red, green, gray, white, orange, tan, yellow, for example) and textures.
As we discuss in this article series, mildew, a sub-class of molds, is an obligate parasite that grows only on living plants, and is generally white in appearance. Our page top photograph a severe basement mold contamination in a flooded home found in Poughkeepsie, New York. More photographs of mold that is often mistaken for or mis-named "mildew" are included in this article and links provide articles that correctly identify mildew as well as explain the difference between mildew and mold.
See MOLD APPEARANCE - WHAT MOLD LOOKS LIKE for a photo-guide to indoor molds - real mold or fungal growth in buildings. None of these will be mildew - a plant mold that is an obligate parasite - mildew only grows on living plants.In general, mold is a term encompassing a very wide family of organisms (the Fifth Kingdom) that includes more than a million and a half species. Lots of molds grow on lots of different organic substances, under a variety of conditions of light and temperature, but all molds require moisture and something organic on which to grow (paper, wood, paint, cloth, leather, plastic, etc.).
Also see Mold spores in the Home - a Photo ID Library for detection and identification of mold allergens on indoor building surfaces. Readers who need to cure or prevent efflorescence, mold or "mildew" in buildings should see STAIN DIAGNOSIS on BUILDING INTERIORS, and MOISTURE CONTROL in buildings as well as HUMIDITY LEVEL TARGET also VENTILATION in BUILDINGS and WATER ENTRY in buildings.
Mold on painted building surfaces or furnishings: We define "mildew" stains on or in paint at Mildew in paint. Look closely at our peeling paint photograph at above left and you can see some black mold on the back surface of an old layer of exterior paint exposed by our peel-back of blistered paint on a wood clapboard wall. More black mold is visible on the exposed wood surface too.
Our micro-photograph of a cross-section cut moldy paint (below right) shows black mold growth inside the layer of paint sampled from a surface. It's mold, not mildew. Our high-resolution microscope photograph (below) of mold found on exterior wall paint confirms that this is a mitosporic fungi, not mildew.
Frequently Asked Questions (FAQs)
Questions & answers or comments about mildew and mildew odors in buildings and on building surfaces - is it really mildew? Probably not.
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Technical Reviewers & References
Related Topics, found near the top of this page suggest articles closely related to this one.