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ENVIRONMENTAL HAZARDS - INSPECT, TEST, REMEDY
MOLD: A COMPLETE GUIDE to TEST CLEAN PREVENT
ACTIVITY of MOLD in BUILDINGS
AGE of MOLD - Old is the Mold?
AIR CLEANER PURIFIER TYPES
AIR FILTERS for HVAC SYSTEMS
AIR TEST SAMPLING CASSETTE STUDY
AIRBORNE MOLD COUNT NUMBER GUIDE
AIRBORNE PARTICLE ANALYSIS METHODS
ALLERGEN TESTS for BUILDINGS
BROWN HAIRY BATHROOM MOLD
BIBLIOGAPHY for ENVIRONMENTAL HEALTH, MOLD, IAQ
BLACK MOLD, HARMLESS COSMETIC
BLACK MOLD, TOXIC & ALLERGENIC
BLEACHING MOLD, Advice about
BOOK MOLD, Moldy Book Cleaning
BOOKSTORE - ENVIRONMENTAL
CACTUS FUNGI / MOLD
CAR MOLD CONTAMINATION
CARPET DUST IDENTIFICATION
CARPET PADDING ASBESTOS, MOLD, ODORS
CARPET FUNGICIDAL SPRAY
CARPET STAIN DIAGNOSIS
CARPET & other STAIN TESTS
CARPET TEST PROCEDURE
CARPETING & INDOOR AIR QUALITY
CHAIN OF CUSTODY - TEST SAMPLE
CLEARANCE INSPECTIONS - MOLD CLEANUP
DIRECTORY of MOLD / ENVIRONMENTAL EXPERTS
DIRT FLOOR MOLD CONTAMINATION
Disinfecting Buildings with Bleach
DO-IT-YOURSELF MOLD CLEANUP WARNINGS
DUST ANALYSIS for FIBERGLASS
DUST, HVAC CONTAMINATION STUDY
EFFLORESCENCE, Salts & White / Brown Deposits
FEAR of MOLD - MYCOPHOBIA
Fiberboard Insulation Sheathing Mold
FIBERGLASS INSULATION MOLD
FIND MOLD, ESSENTIAL STEPS
FIND MOLD in BUILDINGS, HOW TO
FIRE DAMAGE vs MOLD DAMAGE
FLOODS IN BUILDINGS-mold
FOXING STAINS on books & papers
FUNGICIDAL SPRAY & SEALANT USE GUIDE
GAS DETECTION INSTRUMENTS
GAS EXPOSURE EFFECTS, TOXIC
GAS EXPOSURE LIMITS & STANDARDS
GAS TEST PROCEDURES
HOUSE DUST ANALYSIS
HUMIDITY CONTROL & TARGETS INDOORS
LAB PROCEDURES MICROSCOPE TECHNIQUES
LIGHT, GUIDE to FORENSIC USE
MEDIA BLASTING for MOLD REMOVAL
METHANE GAS SOURCES
MICROSCOPE DIGITAL PHOTOGRAPHY
MEDIA BLASTING for MOLD REMOVAL
METHANE GAS SOURCES
MICROSCOPE DIGITAL PHOTOGRAPHY
MILDEW ERRORS - MOLD PHOTOS
MILDEW REMOVAL & PREVENTION
MOISTURE CONTROL in BUILDINGS
MOLD: A COMPLETE GUIDE TO MOLD
MOLD EXPERT, WHEN TO HIRE
MVOCs & MOLDY MUSTY ODORS
MYCOPHOBIA, STAINS MISTAKEN for MOLD
MYCOTOXIN EFFECTS of MOLD EXPOSURE
ODORS GASES SMELLS, DIAGNOSIS & CURE
RENTERS GUIDE TO MOLD & IAQ
ROBIGUS & Wheat Rust Fungus
SMELL PATCH TEST to Track Down Odors
STAINS on & in BUILDINGS, CAUSES & CURES
THERMAL IMAGING MOLD SCANS
TRAPPED MOLD BETWEEN WOOD SURFACES
UV LIGHT BLACK LIGHT USES
VAPOR BARRIERS & CONDENSATION
VENTILATION in BUILDINGS
Volatile Organic Compounds VOCs
WATER ENTRY in buildings
Bathroom mold causes, cures, prevention: this article gives advice on how to find, test for, remove & prevent mold in bathrooms, including mold found on bath tiles, moldy tile grout, moldy caulk, and hidden bathroom mold.
Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.
Our photos above show close ups of moldy bath tile grout. Mold may also be found in bathrooms on bath caulks (page to photo) and on the surface of ceramic tiles and even toilets and sinks where those surfaces have become coated with soap scum or organic dust and debris. These molds may appear to be "black mold" but on closer look they are usually brown members of the Cladosporium family.
A bit of looking around may disclose larger and more problematic mold contamination in bathrooms. Here are some places to look:
If there has been protracted leakage or spillage under built-in cabinets such as bath vanities, there may be a mold cleanup job under or behind these components.
We removed this bath vanity after receiving complaints of recurrent moldy odor in this bathroom. No amount of cleaning of other bath surfaces had reduced the mold smell. A slight slope in the bathroom floor had been sending tub spillage behind this bath vanity for a decade or more. Water spillage was inconsistent - it depended on who used the shower and how much water they splashed onto the floor.
What makes a lot of sense sense is to study the building carefully to decide on the building points at most risk of having been wet from leaks due to construction details or other site observations. That's where one would make a test cut. Like behind the vanity cabinet near the most moldy corner in our photo, above right.
Identifying & Removing Dense Brown Hairy Mold Found On Bathroom Floor & Under Carpeting
Question: what is this hairy brown mold found in my bathroom? Is brown hairy mold dangerous? How do I get rid of it?
I live in Melbourne Australia and I have a major issue with my bathroom floor. Please see my brown hairy mold photographs (below). The images are of brown mold growths on the bathroom floor, & afterwards when I had scraped them off the floor.
I do understand that no competent expert would pretend to ID mold [or any other microscopic particle] from just a field photo.
But I have no idea what I'm dealing with and of course am concerned for my health and my family's. Can you tell me please - is brown hairy mold dangerous? When I scraped the protrusions off the bathroom floor, it turned into a powder & hair like structures stood on end. I would be most grateful if you could please tell me what this could be and if it is dangerous.
I'm wanting to send a specimen away for analysis & hope that I can locate a government organisation in Australia, such as the Agricultural Department, hopefully they can do this at no cost. - G. P., Melbourne, Australia
Reply: Examination of fungal material in an aerobiology lab is needed for sure identification of mold
Your photos are blurry and no competent expert would pretend to identify a mold genera or species just from email photos.
But with that caveat stated, the pattern and character of the mold in your photos resembles like a fungus Stemonitis sp. - see Brown Mold where we include photographs of Stemonitis sp. found on a bathroom floor and growing on oriented strand board (OSB) or "waferboard" in a basement.
Enlarging your photos [click any image to see an enlarged version] we see the mold was thick under carpeting (above left) meaning that in at least this area of the building, mold growth, including in hidden cavities such as walls, floors, ceilings, is likely to be extensive.
Watch out: And one would certainly expect other leak damage; that "wrinkled" looking floor baseboard trim board - if that's what it is in photo #1 at above left - means there have been leaks and probably rot.
If the mold test lab or aerobiology lab technician who examines a mold test sample you provide is familiar with myxomycetes, s/he should easily recognize the fungus from an actual sample. - you can use the clear adhesive tape sampling procedure at TEST KITS for DUST, MOLD, PARTICLE TESTS and send the sample to a qualified local lab of your choice [not to us].
Some Brown Hairy Molds are Probably Harmless
Stemonitis sp. is a Myxomycete ( a class of fungus) that is not listed in our MOLD ATLAS & PARTICLES INDEX nor in the authoritative Atlas of Clinical Fungi, deHoog et als. as a known toxic mold but as we warned you earlier, having so much fungal growth and leakage as we saw in that lifted-carpeting photo, you should expect that other genera/species are likely to be present even if you don't see them yourself from a superficial inspection.
Watch out for Other Leaks & Hidden Mold
Watch out: At a minimum you'd be smart to assume there are allergenic molds present and if there is more than about one square meter of moldy material, to use appropriate protection measures during cleanup as well as, of course, finding and correcting the leaks that led to these conditions.
See ACTION GUIDE - WHAT TO DO ABOUT INDOOR MOLD on what to do about mold
We frequently add text and photos to this series of articles. See MOLD APPEARANCE - WHAT MOLD LOOKS LIKE and also to avoid spending on harmless non-mold debris see MOLD APPEARANCE - STUFF THAT IS NOT MOLD. Readers should also review Mold in Fiberglass Insulation in buildings at our The Mold Information Center - What to Do About Mold in buildings.
See Renovating to Avoid Mold Growth for specific tips that will mold-proof your bathroom, and see CONSTRUCTION DETAILS TO AVOID MOLD for a more broad list of details about mold-resistant construction in buildings.
Frequently Asked Questions (FAQs) about mold growth on bathroom surfaces
Question: is this stuff in our bathroom black mold?
Reply: visible black stuff or mold-suspect materials + evidence of leaks and water spillage can be a clue that says look more carefully for leak damage and hidden mold in buildings
Questions & answers on the diagnosis, cleanup & prevention of mold growth in bathrooms.
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