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Free Encyclopedia of Building & Environmental Inspection, Testing, Diagnosis, Repair
ENVIRONMENTAL HAZARDS - INSPECT, TEST, REMEDY
MOLD: A COMPLETE GUIDE to TEST CLEAN PREVENT
ACCURACY vs PRECISION of MEASUREMENTS
ACTIVITY of MOLD in buildings
AGE of MOLD - Old is the Mold?
AIR POLLUTANTS, COMMON INDOOR
AIR TEST SAMPLING CASSETTE STUDY
AIRBORNE MOLD COUNT NUMBER GUIDE
AIRBORNE PARTICLE ANALYSIS METHODS
ALLERGEN TESTS for BUILDINGS
ALLERGENS in BUILDINGS, RECOGNIZING
ALLERGY & MOLD IAQ PRODUCTS
ALLERGY TESTS for PEOPLE
ALLERGY TEST ACCURACY
BASEMENT MOLD WATER IMPACT
BIBLIOGAPHY for ENVIRONMENTAL HEALTH, MOLD, IAQ
BIOLOGICAL POLLUTANTS in the HOME - EPA
BLACK MOLD, HARMLESS COSMETIC
BLACK MOLD, TOXIC & ALLERGENIC
BLEACHING MOLD, Advice about
BOOK MOLD, Moldy Book Cleaning
BOOKSTORE - ENVIRONMENTAL
CAR MOLD CONTAMINATION
CARPET DUST IDENTIFICATION
CARPETING & INDOOR AIR QUALITY
CARPETS & PADDING ODORS IN buildings
CHINESE DRYWALL HAZARDS
CLEARANCE INSPECTIONS - MOLD CLEANUP
DIRECTORY of MOLD / ENVIRONMENTAL EXPERTS
DIRT FLOOR MOLD CONTAMINATION
DISINFECTANTS & SANITIZERS, SOURCES
DISINFECTING BUILDINGS with BLEACH
DO-IT-YOURSELF MOLD CLEANUP WARNINGS
DRYWALL MOLD TESTING
DUCT SYSTEM & DUCT DEFECTS
DUST, HVAC CONTAMINATION STUDY
EFFLORESCENCE, Salts & White / Brown Deposits
EMERGENCY RESPONSE, IAQ, GAS, MOLD
FEAR of MOLD - MYCOPHOBIA
Fiberboard Insulation Sheathing Mold
FIBERGLASS INSULATION MOLD
FIND MOLD, ESSENTIAL STEPS
MOLD in BUILDINGS
FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FLOODS IN buildings-mold
FLOOR & SUBFLOOR MOLD, HIDDEN
HIDDEN MOLD, HOW TO FIND
HUMIDITY CONTROL & TARGETS INDOORS
INDOOR AIR HAZARDS TABLE
Indoor Air Pollution Book Online CPSC
INDOOR AIR QUALITY & HOUSE TIGHTNESS
INDOOR AIR QUALITY IMPROVEMENT GUIDE
INDOOR AIR QUALITY METHODS COMPARED
LAB PROCEDURES MICROSCOPE TECHNIQUES
Legionella BACTERIA & HVAC Equipment
MEDIA BLASTING for MOLD REMOVAL
MILDEW in BUILDINGS ?
MILDEW ERRORS, IT's MOLD
MILDEW REMOVAL & PREVENTION
MOISTURE CONTROL in BUILDINGS
MOLD: A COMPLETE GUIDE TO MOLD
MOLD CLEANUP GUIDE- HOW TO GET RID OF MOLD
MOLD COUNT NUMBER GUIDE
MOLD CULTURE TEST KIT VALIDITY
MOLD DETECTION & INSPECTION GUIDE
MOLD or INDOOR AIR EMERGENCY RESPONSE
MOLD LEVEL IN AIR, VALIDITY
MOLD ODORS, MUSTY SMELLS
MOLD PREVENTION GUIDE
MOLD RELATED ILLNESS GUIDE
MOLD SAFETY WARNINGS
MOLD TEST KITS
MOLD TESTING METHOD VALIDITY
MSDS Material Safety Data Sheets
MYCOPHOBIA, STAINS MISTAKEN for MOLD
ODORS GASES SMELLS, DIAGNOSIS & CURE
OZONE for MOLD OR ODORS
PAINTS & COATINGS ODORS IN BUILDINGS
PARTICLE SIZES & IAQ
Particulates & Allergens Indoors
RADON HAZARD TESTS & MITIGATION
RENTERS & TENANTS GUIDE TO INDOOR HAZARDS
SMELL PATCH TEST to Track Down Odors
SEWAGE BACKUP TEST & CLEANUP
STAINS on & in BUILDINGS, CAUSES & CURES
STAINS on CONCRETE
STAIN DIAGNOSIS on BUILDING EXTERIORS
STAIN DIAGNOSIS on BUILDING INTERIORS
STAINS & Thermal Tracking
THERMAL IMAGING MOLD SCANS
THERMAL TRACKING & THERMAL BRIDGING
TRAPPED MOLD BETWEEN WOOD SURFACES
TRAPPED MOLD BETWEEN WOOD SURFACES
UV LIGHT BLACK LIGHT USES
VOCs VOLATILE ORGANIC COMPOUNDS
Mold cleanup mistakes: inadequate mold cleanup plan, too-narrow a scope of work. Here we explain how an inadequate mold cleanup plan can end up costing unnecessarily when hiring a mold cleaning company. This section of our "How to Clean Mold" article describes common mistakes people make when attempting to clean up mold. Avoiding these mold cleanup errors can save you money and may also avoid dangerous side effects of bleach, mold chemicals, or ozone when improperly applied.
We also discuss common errors made when cleaning wood surfaces, such as relying on bleach or performing expensive and unnecessary cleaning on cosmetic black mold on wood surfaces.
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MOLD CLEANING MISTAKES people make when cleaning-up moldy building materials and moldy surfaces, continued.
Mold tests with no inspection: The most common complaint we hear from readers is that they have just paid a "mold expert" (read "weekend mold class") to "inspect and test" their building for toxic mold, but the expert, who may have been paid $600. to $2400. did not do a thorough job.
Tests for mold, used without an accompanying building inspection by an expert, are not reliable when they give a negative ("no mold found") result.
Do the job right: If a professional mold inspection and test was justified in the first place, (see MOLD EXPERT, WHEN TO HIRE), then it the job should have been done with sufficient expertise and thoroughness that the building owners and occupants can have reasonable confidence in the conclusions reached.
Our photo at left shows a very moldy pantry in a home. Even if this is all the mold that was seen, mold growth this heavy suggests damp indoor conditions - it may be appropriate to inspect the building carefully and completely.
If you are betting the health of building occupants and perhaps also many thousands of dollars on the results of a "mold test" then shouldn't the test be thorough and valid?
In our opinion, we'd rather have no tests performed than accept the "findings" of unreliable tests and screens for mold.
Mold Cleanup Workmanship, Procedures, & Asbestos: We add that during any building demolition or remodeling you should be alert for other building contaminants that might need attention and which can be most-economically addressed by combining them into the mold remediation project.
A common example is the discovery of asbestos pipe or surface insulation in a building which because of its location or condition needs to be encapsulated or removed. Since the technology for mold remediation involves similar containment and cleaning standards, if you have an asbestos problem at a different area on a moldy building you should discuss adding that work to the job.
If asbestos materials are in the mold-remediation area and will be disturbed by the mold cleanup process, removing and cleaning this material will probably be unavoidable and will, unfortunately, add to the cost of the job.
INCOMPLETE MOLD CLEANUP or incomplete removal of moldy materials, or RELYING ON of BIOCIDES, MOLD SPRAYS and MOLD ENCAPSULANT PAINTS
Leaving moldy insulation that looks "OK" but was wet or was exposed to mold, demolition dust, and debris. See INSULATION MOLD.
Leaving moldy surfaces: from failing to examine the work area and other building areas; leaving moldy areas even outside of the remediation area can prevent a successful clearance inspection and test.
Leaving mold reservoirs that were missed at the initial inspection (client says "just inspect the basement") can also significantly add to the mold cleanup cost if the mold remediation crew has to return to the property to address a moldy area that should have been included in (but was omitted from) the original work plan. (Photo at left shows moldy flooring left under a built-in bureau).
Failure to remove moldy debris or mold-suspect insulation, leaving demolition debris, and just failure to actually sweep up and HEPA vacuum the cleanup area are surprisingly common among un-trained (and lower-initial-cost) mold cleanup company work.
Our photo (left) shows a crawl space that was "sprayed with mold encapsulant) in a $14,000. crawlspace mold cleanup job. Our client did not get what they needed.
Moldy fiberglass insulation was not removed
The crawl space floor was littered with debris
Occasional "where easy" joists had been sprayed - this work was expensive and ineffective.
See MOLD CLEARANCE INSPECTIONS for a description of tests and inspections to be sure that a mold cleanup job has been done properly. A paid professional mold clearance inspection is appropriate if the mold cleanup job itself involved a significant cost.
Spraying biocides or fungicidal sealants over moldy dust, dirt and debris that should have been removed (photo above right) is a common mold cleanup error. You may be leaving "dead" but toxic or allergenic particles at high levels in the building.
We like biocides as a final wash, and we like fungicidal sealants in problem areas because by reducing the moisture-uptake of wood surfaces they probably retard future mold growth. Our photo (above left) shows a worker applying biocide to carpeting - not a procedure that we recommend. Moldy wall to wall carpets should be removed.
But biocides, fungicidal sprays, and encapsulating mold paints are not an effective substitute for removing the problem mold reservoir in a building. See FUNGICIDAL SPRAY & SEALANT USE GUIDE for additional details. See MOLD SPRAYS, SEALANTS, PAINTS for a discussion of when where how and why to use biocide or fungicidal sprays and encapsulating mold sprays and paints.
Here we show the results of a professional and well-executed moldy crawlspace cleanup job during our clearance inspection and test. This crawl space was difficult because building management was reluctant to take the necessary steps to keep out water. See HOW TO PREVENT FUTURE MOLD for a photo of a water entry source at this crawl space.
Even with these steps, unless the property manager takes the necessary steps to prevent future water in the crawl space this area could have a new problem, especially if it is re-insulated using fiberglass batts.
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Technical Reviewers & References
Related Topics, found near the top of this page suggest articles closely related to this one.
Mold Contamination Testing, Cleanup, Prevention: references & products
OTHER IAQ ISSUES: How To Find and Address Other Indoor Air or Indoor Environment Contaminants Besides Mold
Mold or allergens may not be the only or even the main indoor environmental contaminant. Don't let media attention to mold cause so much enviro-scare fear that other, possibly more urgent hazards go un-addressed.