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Mobile ViewENVIRONMENTAL HAZARDS - INSPECT, TEST, REMEDY MOLD: A COMPLETE GUIDE to TEST CLEAN PREVENT ACCEPTABLE MOLD LEVEL ACCURACY OF VARIOUS MOLD TEST METHODS ACCURACY vs PRECISION of MEASUREMENTS ACTION GUIDE - WHAT TO DO ABOUT INDOOR MOLD ACTIVITY of MOLD in BUILDINGS AIR CLEANER PURIFIER TYPES AIR FILTERS for HVAC SYSTEMS AIR QUALITY STUDY San Miguel de Allende AIR TEST FOR MOLD: ACCURACY 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 ATTORNEYS and EXPERT WITNESSES ATTIC MOLD BASEMENT MOLD BASEMENT MOLD WATER IMPACT BATHROOM MOLD BROWN HAIRY BATHROOM MOLD BIBLIOGAPHY for ENVIRONMENTAL HEALTH, MOLD, IAQ BIOLOGICAL POLLUTANTS BOD WASTEWATER TEST Bisphenol-A, BPA BLACK MOLD, HARMLESS COSMETIC BLACK MOLD, TOXIC & ALLERGENIC BOOK MOLD, Moldy Book Cleaning BOOKSTORE - ENVIRONMENTAL CACTUS FUNGI / MOLD CAR MOLD CONTAMINATION CARPENTER ANTS CARPENTER BEES CARPET DUST IDENTIFICATION CARPET MOLD CONTAMINATION CARPET PADDING ASBESTOS, MOLD, ODORS CARPET FUNGICIDAL SPRAY CARPET STAIN DIAGNOSIS CARPET & other STAIN TESTS CARPET TEST PROCEDURE CARPETING & INDOOR AIR QUALITY CARPETING, SELECTION & INSTALLATION CHAIN OF CUSTODY - TEST SAMPLE CLEARANCE INSPECTIONS - MOLD CLEANUP CONDENSATION or SWEATING PIPES, TANKS CRAWL SPACES DIRECTORY of MOLD / ENVIRONMENTAL EXPERTS DIRECTORY of OIL TANK EXPERTS DIRT FLOOR MOLD CONTAMINATION Disinfectants Disinfecting Buildings with Bleach DO-IT-YOURSELF MOLD CLEANUP WARNINGS DRYWALL MOLD DUCT SYSTEM & DUCT DEFECTS DUST ANALYSIS for FIBERGLASS DUST, HVAC CONTAMINATION STUDY DUST SAMPLING PROCEDURE EFFLORESCENCE, Salts & White / Brown Deposits EMERGENCY RESPONSE, IAQ, GAS, MOLD FEAR of MOLD - MYCOPHOBIA Fiberboard Insulation Sheathing Mold FIBERGLASS INSULATION MOLD FIBERGLASS PARTICLE CONTAMINATION TEST FIELD INVESTIGATION SERVICE FIND MOLD, ESSENTIAL STEPS FIND MOLD in BUILDINGS, HOW TO FIRE DAMAGE vs MOLD DAMAGE FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP FLOODS IN BUILDINGS-mold FLOORING MATERIALS, Age, Types FOXING STAINS on books & papers FUNGICIDAL SPRAY & SEALANT USE GUIDE GAS DETECTION INSTRUMENTS GAS EXPOSURE EFFECTS, TOXIC GAS EXPOSURE SCREENING TEST GAS EXPOSURE LIMITS & STANDARDS GAS PIPING, VALVES, CONTROLS HOUSE DUST ANALYSIS HOUSEWRAP AIR & VAPOR BARRIERS HIDDEN MOLD, HOW TO FIND HUMIDITY CONTROL & TARGETS INDOORS INDOOR AIR HAZARDS TABLE INDOOR AIR QUALITY & HOUSE TIGHTNESS INDOOR AIR QUALITY IMPROVEMENT GUIDE INSULATION MOLD ITCHY FABRICS LABORATORY SERVICES LAB PROCEDURES MICROSCOPE TECHNIQUES LEAD POISONING HAZARDS GUIDE Legionella Legionnaires' Disease Legionella BACTERIA & HVAC Equipment LIGHT, GUIDE to FORENSIC USE LP & Natural Gas Safety Hazards MEDIA BLASTING for MOLD REMOVAL METHANE GAS SOURCES MICROSCOPE DIGITAL PHOTOGRAPHY MEDIA BLASTING for MOLD REMOVAL METHANE GAS SOURCES MICROSCOPE DIGITAL PHOTOGRAPHY MILDEW in BUILDINGS ? MILDEW ERRORS - MOLD PHOTOS MILDEW REMOVAL & PREVENTION MOISTURE CONTROL in BUILDINGS MOLD ACTION GUIDE - WHAT TO DO ABOUT MOLD MOLD ACTIVITY in BUILDINGS MOLD AGE - Old is the Mold? MOLD APPEARANCE - WHAT MOLD LOOKS LIKE MOLD APPEARANCE - STUFF THAT IS NOT MOLD MOLD ATLAS & PARTICLES INDEX MOLD by MICROSCOPE MOLD in the PETRI DISH, PHOTOS Mold on Books, Book Conservation MOLD CLASSES, HAZARD LEVELS MOLD CLEANERS - WHAT TO USE MOLD CLEANUP COMPANIES MOLD CLEANUP, DO IT YOURSELF MOLD CLEANUP GUIDE- HOW TO GET RID OF MOLD MOLD CLEANUP - BLEACH MOLD CLEANUP - HEALTH RISKS MOLD CLEANUP - LIMITATIONS MOLD CLEANUP - MISTAKES to AVOID MOLD CLEANUP - MEDIA BLASTING MOLD CLEANUP - SAFETY WARNINGS MOLD CLEANUP - WOOD FLOORING MOLD CLEANUP - WOOD FRAMING & PLYWOOD MOLD CLEARANCE INSPECTIONS MOLD CLEARANCE: FOLLOWUP STEPS MOLD CLINICAL REFERENCE TEXTS MOLD CONSULTANTS / INSPECTORS MOLD CONTAMINATION LEVELS MOLD CONTAMINATION LEVELS, SPECIFIC MOLD CULTURE PHOTOS MOLD CULTURE SAMPLING METHOD MOLD CULTURE TEST ERRORS MOLD CULTURE TEST KIT VALIDITY MOLD DETECTION & INSPECTION GUIDE MOLD DOCTORS - ENVIRONMENTAL MEDICINE MOLD or INDOOR AIR EMERGENCY RESPONSE MOLD EXPERT, WHEN TO HIRE MOLD EXPOSURE, FOOD HAZARDS MOLD EXPOSURE RISK LEVELS L1: Very-Low Mold Risk L2: Low Mold Risk L3: High Mold Risk L4: Contaminated MOLD EXPOSURE STANDARDS MOLD FAQ's MOLD FREQUENCY in BUILDINGS MOLD GROWTH ON SURFACES, PHOTOS MOLD GROWTH on SURFACES, TABLE OF MOLD GROWTH in/on BUILDING INSULATION MOLD INFORMATION CENTER MOLD INSPECTORS & MOLD TESTERS MOLD INSPECTION HOME BUYERS GUIDE MOLD INSPECTION SERVICE MOLD INVESTIGATION PROCEDURE TIPS MOLD INVESTIGATION REPORTS MOLD KILLING GUIDE MOLD LAB REPORTS MOLD LEVEL IN AIR, VALIDITY MOLD LEVEL REPORTS MOLD LEVELS IN BUILDINGS MOLD by MICROSCOPE MOLD ODORS, MUSTY SMELLS MOLD on or in CARPETS MOLD ON DIRT FLOORS MOLD PREVENTION GUIDE MOLD RELATED ILLNESS GUIDE MOLD RELATED ILLNESS SYMPTOMS MOLD RESISTANT CONSTRUCTION MOLD SAFETY WARNINGS MOLD SPRAYS, SEALANTS, PAINTS MOLD STANDARDS MOLD STANDARDS - GOVERNMENT MOLD STANDARDS - WORLD WIDE MOLD TOXICITY VARIATION MOLD TEST KITS MOLD TEST PROCEDURES MOLD TEST REASONS MOLD TESTING METHOD VALIDITY MOLD TESTING SERVICES MSDS Material Safety Data Sheets MVOCs & MOLDY MUSTY ODORS MYCOPHOBIA, STAINS MISTAKEN for MOLD MYCOTOXIN EFFECTS of MOLD EXPOSURE Nanomaterials Hazards NOISE / SOUND DIAGNOSIS & CURE ODORS GASES SMELLS, DIAGNOSIS & CURE OZONE for MOLD OR ODORS PAINTS & COATINGS ODORS IN BUILDINGS PARTICLE SIZES & IAQ Particulates & Allergens Indoors Pesticide Exposure Hazards PET ALLERGEN REMEDIES PLASTIC CONTAINERS, TANKS, TYPES PLASTIC HEATER VENT PLASTIC ODORS-SCREENS, SIDING PLUMBING SYSTEM ODORS POLLEN Photographs RENTERS GUIDE TO MOLD & IAQ ROBIGUS & Wheat Rust Fungus ROT RESISTANT LUMBER ROT, TIMBER FRAME ROT, TIMBER ASSESSMENT SLIDE PREPARATION, MICROSCOPE SMELL PATCH TEST to Track Down Odors SOUND CONTROL in BUILDINGS STAIN & BIODETERIORATION AGENT CATALOG STAINS on & in BUILDINGS, CAUSES & CURES STAIN DIAGNOSIS on BUILDING EXTERIORS STAIN DIAGNOSIS on BUILDING INTERIORS STAINS on INDOOR SURFACES: PHOTO GUIDE STAINS & Thermal Tracking TECHNICAL & LAB PROCEDURES TERMITES TEST KITS for DUST, MOLD, PARTICLE TESTS Thermal Expansion Cracking of Brick THERMAL EXPANSION of HOT WATER THERMAL EXPANSION of MATERIALS THERMAL IMAGING, THERMOGRAPHY THERMAL IMAGING MOLD SCANS THERMAL MASS in BUILDINGS THERMAL TRACKING & THERMAL BRIDGING TRAPPED MOLD BETWEEN WOOD SURFACES TRIM, INTERIOR INSTALLATION TRAPPED MOLD BETWEEN WOOD SURFACES TRUSS UPLIFT, ROOF TRUSSES, Floor & Roof Urea Formaldehyde Foam Insulation UFFI URETHANE FOAM Deterioration, Outgassing UV LIGHT BLACK LIGHT USES VAPOR BARRIERS & CONDENSATION in BUILDINGS VENTILATION in BUILDINGS VINYL CHLORIDE HEALTH INFO VINYL SIDING VINYL Siding or PLASTIC Window ODORS Volatile Organic Compounds VOCs WALL SIDING TRIM & FINISHES WALL FINISHES INTERIOR WALL CONSTRUCTION BARRIER vs CAVITY WATER BARRIERS, EXTERIOR BUILDING WATER ENTRY in buildings WATER ODORS, CAUSE CURE More Information |
How to evaluate the risk of mold contamination in a building: to assist in predicting the chances and degree of mold contamination in buildings, even when extensive mold is not visible, this document describes four levels of risk of existing mold contamination or future mold growth in buildings based on the building history, visual observations, and the materials of construction. Additional risk factors that need to be considered in deciding if a professional mold/IAQ investigation is warranted must include the health risk or vulnerability of building occupants and the existence of complaints at a building. See "When to hire a professional to investigate a building for toxic mold. Also see MOLD GROWTH on SURFACES for an index of what mold genera/species are frequently found on various building surfaces and materials. Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman. Characteristics of Buildings or Building Areas at Very-Low Mold Risk: Mold Risk Level 1
Our photo (left) shows a wood paneled basement where we found no visible mold and no evidence of a history of water entry inside. Inspecting outside we did not find evidence of roof spillage or surface water runoff against or near the building. While hidden mold could be present, there were no building related health or air quality complaints, there was no visible evidence of mold or leaks, and no there was no report of building history that justified further more invasive mold inspection and testing. Level 1 Mold Risk Areas include areas and materials in a building for which there is no evidence of having become wet or exposed to high moisture, where no problematic mold has been detected, or where the materials are generally unfriendly to mold growth, such as clean, un-painted masonry surfaces. Mold can appear in these areas in the future if building conditions change or a new mold-related event occurs. Where a building is at risk-level 0, invasive inspection and expert mold testing are not required. Characteristics of Buildings or Building Areas at Low Mold Risk: Mold Risk Level 2
This category also includes instances where mold-friendly materials have become wet from a single event and where the materials were successfully and completely dried within 24 to 48 hours of becoming wet, leaving no hidden, enclosed cavities unattended. Our photo (left) shows a bath vanity in a bathroom where there was no visible mold. But the toilet (lower right) had a burst tank that flooded the ceramic tile floor as well as other areas of this home. Though no mold was visible, we removed the vanity to inspect behind it as part of the building rapid-dry-out procedure in an attempt to avoid a mold problem. The results are shown just below at L3: High Mold Risk. Mold is not visible and mold has not been detected by expert inspection and sampling. In the absence of mold-related occupant complaints expert inspection and testing are not required. Characteristics of Buildings or Building Areas at High Mold Risk: Mold Risk Level 3
Our photo (left) shows moldy drywall found behind a bathroom vanity cabinet that was removed for renovations. Water from a nearby tub ran across the floor and below this vanity cabinet where, trapped, it led to moldy drywall. It may be appropriate to cut open the drywall to confirm that there is not a larger mold contamination problem in the wall cavity, but the visible mold is less than 30 sq.ft. and is a small do-it-yourself mold cleanup project. In these wall cavities we did not find additional mold contamination and the cleanup was just a small mold project. Areas of mold contamination smaller than 30 sq.ft. of contiguous moldy material can usually be cleaned or removed as an ordinary cleaning project by a homeowner or cleaning service, without requiring expert mold inspection, testing and remediation services. Also see HIDDEN MOLD, HOW TO FIND. Characteristics of Buildings or Building Areas With Actionable Mold Contamination: Mold Risk Level 4
Areas of mold larger than 30 sq.ft.: No mold inspection nor testing is required to confirm that the property at left needs professional mold remediation. However inspection may be needed to define the extent and scope of mold cleanup and to prepare pre-cleanup test samples out of the work area to protect against cross-contamination during the mold remediation project. Non-cosmetic indoor mold found covering 30 sq.ft. or more of contiguous or effectively-contiguous space means that professional cleaning and possibly professional diagnostic inspection and testing are appropriate. See MOLD TEST REASONS for a discussion of when mold testing in buildings is appropriate. Also see HIDDEN MOLD, HOW TO FIND. Cosmetic molds such as bluestain are of no risk to the building or its occupants and should be addressed only if it is a cosmetic concern. See Recognize Harmless Black Mold for details. Expert sampling may suggest that significant problematic mold is present at an uncertain level/extent in the building, or mold may not have been detected. Additional inspection and testing are appropriate and may require use of invasive methods. Frequently Asked Questions (FAQs)... Ask a Question or Search InspectApediaQuestions & answers or comments about how to assess the risk that a building has a serious mold contamination problem. Ask a Question or Enter Search Terms in the InspectApedia search box just below. Technical Reviewers & ReferencesRelated Topics, found near the top of this page suggest articles closely related to this one.
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