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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, HOW OLD
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
DISINFECTANTS & SANITIZERS, SOURCES
DISINFECTING BUILDINGS with BLEACH
DO-IT-YOURSELF MOLD CLEANUP WARNINGS
DUST ANALYSIS for FIBERGLASS
DUST, HVAC CONTAMINATION STUDY
EFFLORESCENCE SALTS & WHITE DEPOSITS
FEAR of MOLD - MYCOPHOBIA
Fiberboard Insulation Sheathing Mold
FIBERGLASS INSULATION MOLD
FIND MOLD, ESSENTIAL STEPS
MOLD in BUILDINGS
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
HOUSE DUST COMPONENTS
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, IT's MOLD
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
VOCs VOLATILE ORGANIC COMPOUNDS
WATER ENTRY in buildings
How to clean up or remove mold in bathrooms: this document explains how to best to remove & prevent future mold contamination in bathrooms, including bathroom renovation tips - easy details that will help mold-proof your bathroom.
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Small amounts of mold can be removed simply by cleaning or removing infected materials, something most homeowners can handle. Use any household cleaner or bathroom cleaner to clean off mold from tile, grout, or other hard surfaces.
You can use a fungicidal cleaner such as the product shown at left if you like, but any household cleaner, even plain soap and water will do fine. It's the cleaning that is important, not surface infection, when we're removing mold.
Preventing future mold growth can be assured more reliably by fixing the conditions that invited it in the first place, rather than by relying on mold killing sprays.
Bleach solution to clean off mold is not necessary - the object is to remove mold, not kill it.
But since cleaning off surface mold may leave stains in the tile grout, you might prefer to bleach that surface anyway. If you are going to use bleach to clean mold anyway, perhaps for cosmetic reasons, see MOLD CLEANUP with BLEACH for more advice.
Handling Hard-to-Remove Brown or Black Mold Stains in Tile Grout or Caulk
Before giving up on mold-stained grout or caulk in a bath, kitchen or other area, try first drying the stained area, then spraying it with a bleach-based tile cleaner. Let the cleaner sit on the surface for 24 hours before washing off the surface. As long as you are dealing with a ceramic surface, the spray won't damage the tile or marble and you will probably find that the stain diminishes or disappears completely. Two or three such treatments will usually remove just about all dark stains on grout or caulk in a bathroom or other area.
Watch out: don't over-do it with straight bleach. The straight-bleach solution may be strong enough to damage building surfaces, and it's not normally necessary.
You may find that moldy caulk just won't clean up - you'll need to cut and remove the old moldy caulk, clean the tile or tub surfaces thoroughly (we use alcohol), and re-caulk with a mold-resistant bath caulk.
You may read that your bathroom caulk is "mildew resistant" which is funny since there is no mildew in buildings - mildew (a sub group of the larger group of molds) grows on living plants - unless you are growing grapes in the bathroom, it's mold, not mildew.
But forgive the sloppy language and buy mildew-resistant caulk anyway.
Cleaning mold or other stains from paper or other delicate surfaces
Even when removing brown rust and water stains from japanese Shoji screens I never use straight bleach. The risk of damaging the material is just too great. For those delicate surfaces, copying the work of art conservators, I work with a the most gentle, dilute solution possible, with patience, even with a cotton swab in some situations.
For paper and other delicate surfaces I use a dilute cleaner on a cotton swab and I watch for the stain to fade. Quickly I clean the treated area with clean water and gently pat it dry. For more expert advice on this topic see BOOK MOLD, Moldy Book Cleaning
At Bathroom Vanity Cabinet Mold we explained how water running under or behind a bathroom vanity or sink base can cause hidden mold growth on the vanity back, under-side, and on the wall behind the unit. Our two photographs just below show mold that was found on the chipboard vanity base back surface and on the drywall behind the vanity.
The drywall behind the vanity looked bad enough that we explored the wall cavity to be sure that additional demolition above the moldy drywall itself was not needed.
Here we show the underside of the bathroom vanity cabinet. At the top of the photo, in particular, you can see that the chipboard vanity side was swollen and damaged by water that had passed along the bathroom floor.
We decided to toss out this vanity base rather than try to clean and repair it.
Placing our new bath sink vanity base upside down, we sealed the bottom edges as well as all other un-coated surfaces on the vanity back (and front kickboard) before the new unit was installed.
We continued mold-proofing this bathroom with the details listed just below.
How to Prevent Mold Growth in Bathrooms, Kitchens, Laundry Rooms
After cleaning up a moldy bathroom, or when renovating or when constructing a new bathroom, we take these steps to reduce future mold growth:
Watch out: in most circumstances it is not necessary to test mold to identify the genera species. That information will not change how mold should be removed or prevented in buildings. But on occasion, such as for medical reasons or for control of a larger, costly mold remediation project, there are reasons (MOLD TEST REASONS) to identify mold on surfaces or in building air or dust.
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