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How to find hidden building mold - look in these oft-forgotten places. This article provides suggestions for where else to look for mold in buildings - places that are often forgotten but places that can harbor significant toxic or allergenic mold reservoirs. The fact that mold is said by some inspectors to be "hidden" in buildings does not mean one cannot find it by careful inspection and testing. We look for mold in buildings where it is not obvious by using context: where do we see leak stains, or where do we see building practices most likely to have produced a hidden leak or moisture problem? Ice dam leaks in walls, hidden plumbing leaks, roof spillage by the foundation, are all common clues that often track to a wet building wall or ceiling cavity and from there to a hidden mold problem which may need to be addressed. This procedure helps identify the presence of or locate the probable sources of mold reservoirs in buildings, and helps decide which of these need more invasive, exhaustive inspection and testing.
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There are many places to look for mold growth. Here are a few others that you might not have considered:
Also see FIND MOLD in BUILDINGS, HOW TO and see MOLD GROWTH on SURFACES for an index of what mold genera/species are frequently found on various building surfaces and materials, and see Mold Related Illness: Index of Symptoms and finally, for an atlas of building molds and for more microphotographs of building mold samples observed in our laboratory, see Mold Atlas of Indoor Clinical Mold, Pathogens, Allergens & Other Indoor Particles. And MOLD BY MICROSCOPE shows what mold looks like under the microscope.
Here are photos of more places to look for hidden mold in buildings
Here we provide a photo tour of mold which was hidden at least from some investigators and occupants, with photo and text tips on spotting problem mold in air conditioning systems, behind and under bath and other cabinets, mold under and in wall to wall carpeting, mold on stored paper files, file folders, and books, mold on, in, and under furniture, and mold behind wallpaper.
Where to look for hidden mold in air conditioning equipment interiors and in HVAC duct work
How We Find Hidden mold behind bathroom and other cabinets
Photos of mold behind a bathroom vanity cabinet base - shower water leaked across the bath floor, under the vanity, and into the wall cavity.
This was a small mold cleanup area, less than 10 sq .ft. and suitable for handling by a homeowner or handyman. The second photo shows the extent of mold after the cabinet was removed.
When we rebuilt this bathroom, since the tile floor slopes slightly down from tub towards the vanity base, as precautions against future mold growth we sealed all of the new vanity underside surfaces to reduce moisture and thus mold growth, and we caulked the vanity carefully at the floor level to prevent water from passing below.
Tips for Finding Hidden Mold Below Built-in Bureau Drawers
How to Find Hidden mold below wall to wall carpeting:
How to Spot Hidden mold on stored papers and files in cabinets:
How to Recognize Hidden Mold on and in Furniture:
How to Find Mold Hidden Behind Wallpaper
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