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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

BASEMENT MOLD
BATHROOM MOLD
BIBLIOGAPHY ENVIRONMENTAL HEALTH, MOLD, IAQ
BIOLOGICAL POLLUTANTS

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

FIBERGLASS HAZARDS
FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FLOODS IN BUILDINGS-mold
FORMALDEHYDE HAZARDS

GAS EXPOSURE EFFECTS, TOXIC

HUMIDITY CONTROL & TARGETS INDOORS
HOUSE DUST ANALYSIS

INDOOR AIR QUALITY IMPROVEMENT GUIDE
INSULATION MOLD

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 HAZARDS
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

More Information

Apartment buildings may look crisp outside but individual rental apartments may be discovered by their tenants to have suffered leak damage and extensive hidden mold - here we give some basic advice Guide to Hidden Mold in Rental Homes, Apartments, Offices
     

  • Guide to hidden mold in rental properties - The mold you see or the mold you tested may not be the only concern nor the main risk. How to handle hidden or "non-visible" mold contaimnation complaints or problems in rental property, apartments, rental homes, offices, Hidden mold contamination testing advice for rental tenants or Hidden mold contamination complaint advice for landlords
  • RENTERS & TENANTS: MOLD ADVICE - home
    • Possible Mold Causes
    • Action Advice for Tenants
    • Rental Apartment Mold Safety Advice
    • Health Risk for Tenants
    • Possible Hidden Mold
    • Building Manager's Guide to Mold
    • What Can Tenant Do
    • Health Department Assistance
  • HIDDEN MOLD, HOW TO FIND - separate article
  • Questions & answers about hidden mold problems in rental apartments
  • References

Click to Show or Hide Related Topics

  • MOLD: A COMPLETE GUIDE - home
  • ACCEPTABLE MOLD LEVEL
  • ACCURACY OF VARIOUS MOLD TEST METHODS
  • ACTION GUIDE - WHAT TO DO ABOUT INDOOR MOLD
  • AIR TEST FOR MOLD: ACCURACY
  • CARPET MOLD CONTAMINATION
  • CRAWLSPACE MOLD ADVICE
  • DISASTERS: BUILDING INSPECTION & REPAIR - home
  • DRYWALL MOLD
  • DUST SAMPLING PROCEDURE
  • EMERGENCY RESPONSE, IAQ, GAS, MOLD
  • HIDDEN MOLD, HOW TO FIND
  • INDOOR AIR QUALITY IMPROVEMENT GUIDE
  • INSULATION MOLD
  • MILDEW in BUILDINGS ?
  • MOLD ACTION GUIDE - WHAT TO DO ABOUT MOLD
  • MOLD AGE - Old is the Mold?
  • MOLD APPEARANCE - WHAT MOLD LOOKS LIKE
  • MOLD APPEARANCE on VARIOUS SURFACES
  • MOLD APPEARANCE - STUFF THAT IS NOT MOLD
  • MOLD CLEANERS - WHAT TO USE
  • MOLD CLEANUP, DO IT YOURSELF
  • MOLD CLEANUP GUIDE to GET RID OF MOLD
  • MOLD CLEARANCE INSPECTIONS
  • MOLD EXPERT, WHEN TO HIRE
  • MOLD EXPOSURE STANDARDS
  • MOLD PRODUCTS, INEFFECTIVE
  • MOLD RELATED ILLNESS SYMPTOMS
  • MOLD SPRAYS, SEALANTS, PAINTS
  • MOLD TEST vs. PROBLEM DIAGNOSIS
  • MOLD TEST KITS
  • MOLD TEST METHOD ACCURACY
  • MOLD TEST REASONS
  • MOLD TESTING METHOD VALIDITY
  • MOLD TESTING SERVICES
  • MVOCs & MOLDY MUSTY ODORS
  • MYCOTOXIN EFFECTS of MOLD EXPOSURE
  • OZONE for MOLD OR ODORS
InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.

This article describes the steps that a tenant in a rental apartment or rental home can take to look for and test for hidden mold contamination, we discuss when such testing is appropriate, and we make suggestions on how to inform building management of a mold problem, what to expect the rental property managers to do if they are going to address a mold problem properly, and what the rental apartment tenant needs to watch out for during a mold investigation and mold remediation of their home.

An easy-to-print PDF version of this article is here.

Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.

A Guide to Possible Hidden Mold in Rental Apartments, Houses, Offices

Photograph of - Black mold on drywall, green mold on drywall and trim, were hidden behind the paneling  in
this apartment bathroom The mold that you *see* may not by any means be the whole problem, or even much of the problem; various species could be in building cavities and in the HVAC system.

Too often we find that "black mold" on building surfaces has received attention but hard-to-see Penicillium sp. or Aspergillus sp. (for example) remain in large reservoirs on building surfaces or in insulation.

Magic bullets: Also, "bleaching mold" or "fogging" or "encapsulating" mold is never a successful remedy for a moldy building.

The places where mold is growing must be found, moldy material removed, exposed surfaces cleaned, and the causes of mold growth corrected.

If the area of mold growth is large (more than 30 sq ft) the work needs to proceed with special procedures to avoid spreading moldy dusty debris around.

Tenant-identified possible mold reservoirs

The tenant or building maintenance staff may have already identified apparent mold reservoirs or sources, and of course there could be other sources from other leaks or problems they haven't discovered:

Roof leaks - can have leaked into ceilings and walls; depending on what building materials used, they could be moldy with problem molds.

HVAC systems - If there is a common A/C duct system which has become mold contaminated, no amount of cleaning in your immediate apartment would be sufficient since it is possible that the whole system needs to be cleaned, or possibly some duct sections replaced, and the cause corrected. Also it is common for A/C condensate or water from a chiller system to leak; water could have leaked into your closet ceiling and walls, also creating a problem mold reservoir.

Building insulation - often building insulation has become mold contaminated but looks "clean" to the naked eye. Few mold inspectors test this material, yet it is often discovered to be the principal problem mold reservoir in some building areas.

Very often when I visit a site I find other leaks and mold sources that need to be addressed, so I wouldn't assume these are the full extent of what needs attention.


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Technical Reviewers & References

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

  • HOW TO LOOK FOR MOLD - How to Find and Test for Hidden Mold in Buildings we give tips on how to spot problem mold - some of the more dangerous molds are hard to see
  • Insulation Mold: How to Find and Test for Mold in Insulation - insulation over a damp crawl space or below a leaky roof is often moldy but may look clean
  • DUCT SYSTEM DEFECTS - Heating and Cooling Duct Work Inspections for Adequacy, Safety, Defective Materials, Asbestos, Mold tips on looking for mold or conditions likely to produce contamination in HVAC duct systems and air handlers

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.
  • Home Reference Book - Carson DunlopThe 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.

  • GO TO Carson Dunlop's Home Study Course Information - How to Become a Home Inspector: Carson Dunlop's nationally recognized Home Study Course, selected by ASHI the American Society of Home Inspectors and other professionals and associations. This website author is a contributor to this course.
  • GO TO Carson Dunlop's Home Study Course Information - How to Become a Home Inspector: Carson Dunlop's nationally recognized Home Study Course, selected by ASHI the American Society of Home Inspectors and other professionals and associations. This website author is a contributor to this course.
  • GO TO Carson Dunlop's Home Study Course Information - How to Become a Home Inspector: Carson Dunlop's nationally recognized Home Study Course, selected by ASHI the American Society of Home Inspectors and other professionals and associations. This website author is a contributor to this course.
    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.
  • Kansas State University, department of plant pathology, extension plant pathology web page on wheat rust fungus: see http://www.oznet.ksu.edu/path-ext/factSheets/Wheat/Wheat%20Leaf%20Rust.asp
  • "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
  • US EPA - Mold Remediation in Schools and Commercial Building [Copy on file at /sickhouse/EPA_Mold_Remediation_in_Schools.pdf ] - US EPA
  • US EPA - Una Breva Guia a Moho - Hongo [Copy on file as /sickhouse/EPA_Moho_Guia_sp.pdf - en Espanol

Allergies, Allergens, Allergy Testing in Buildings - References & Products

  • Air Conditioning System Blower Fans & Filters Cascading for Optimum Indoor Air Quality
  • Allergen Tests in Buildings advice about how to test, what to look for, in evaluating the level of dog, cat, or other animal allergens in a building
  • "IgG Food Allergy Testing by ELISA/EIA, What do they really tell us?" Sheryl B. Miller, MT (ASCP), PhD, Clinical Laboratory Director, Bastyr University Natural Health Clinic - ELISA testing accuracy: Here is an example of Miller's critique of ELISA http://www.betterhealthusa.com/public/282.cfm - Townsend Letter for Doctors and Patients
    The critique included in that article raises compelling questions about IgG testing assays, which prompts our interest in actually screening for the presence of high levels of particles that could carry allergens - dog dander or cat dander in the case at hand.
    http://www.tldp.com/issue/174/IgG%20Food%20Allergy.html contains similar criticism in another venue but interestingly by the same author, Sheryl Miller. Sheryl Miller, MT (ASCP), PhD, is an Immunologist and Associate Professor of Basic and Medical Sciences at Bastyr University in Bothell, Washington. She is also the Laboratory Director of the Bastyr Natural Health Clinic Laboratory.
  • Allergens: Testing for the level of exposure to animal allergens is discussed at http://www.animalhealthchannel.com/animalallergy/diagnosis.shtml (lab animal exposure study is interesting because it involves a higher exposure level in some cases
  • Allergens: WebMD discusses allergy tests for humans at webmd.com/allergies/allergy-tests
  • Animal Allergens: Dog, Cat, and Other Animal Dander - Cleanup & Prevention Information for Asthmatics and regarding Indoor Air Quality.
  • Atlas of Mold Related Illness Symptoms & Complaints - long list of both documented, studied mold related illness, and complaints ascribed to mold contamination or allergens in buildings
  • Cat Dander: how to inspect and test a building for past or current presence of cats, cat hair, cat dander, and cat allergens
  • Clinical Atlas of Mold Toxicity - An Online Description of Toxic, Pathogenic, Allergenic Fungi, Fungal Diseases
  • Fiberglass Insulation Contains Mold© 2005 comments about a field study in process, & more about health hazards from fiberglass insulation
  • Humidity: What indoor humidity should we maintain in order to avoid a mold problem?
  • Mold Action Guide detailed guide on finding, removing, and preventing indoor mold contamination
  • Odors, Odor Detection, Smells, & Gases how to find and identify sources of noxious or toxic odors and gases
  • Other environmental risks, Our much longer list: Asbestos, carbon monoxide, electromagnetic fields, etc.
  • Ozone: The Use of Ozone Indoors for Control of Odors and Mold Removal in Buildings: A Summary of Hazards and False Claims.
  • Pollen Allergens: identification, plant pollen and indoor air quality
  • Products to Reduce Mold & Allergy Problems to reduce indoor mold or allergen levels: air cleaners, air purifiers, dust mite covers, vacuum cleaners, crawl space vents
  • 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
  • Rodent control issues, including dander, fecal, and urine contamination of Buildings and Building insulation are discussed at our
  • Sewage and Septic backup contamination in Buildings: inspection, testing, remediation, & references to expert sources
  • Action Guide: What to do about mold, mildew, and other indoor allergens
  • ...

Mold Contamination Testing, Cleanup, Prevention: references & products

  • GO TO the MOLD and INDOOR ENVIRONMENT INFORMATION CENTER for in-depth advice on avoiding testing for or cleaning up mold and other indoor environmental hazards, odors, gases, contaminantsThe Mold Information Center: What to Do About Mold in Buildings, When and How to Inspect for Mold, Clean Up Mold, or Avoid Mold Problems
  • Aerobiology, Building Science, Microscopy, & Laboratory References, an extensive technical bibliography
  • Allergens: what they look like in buildings
  • Associations: Sick House, Sick Building, SBS - Air Quality, Government, Private Associations and Information Resources
  • Atlas of Clinical Fungi, 2nd Ed., GS deHoog, J Guarro, J Gene, & MJ Figueras, Centraalbureau voor Schimmelcultures, Universitat Rovira I Virgili, 2000, ISBN 90-70351-43-9 (you can buy this book at Amazon) - The Atlas of Clinical Fungi is also available on CD ROM
  • 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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