Musty Odors - Do They Always Indicate Mold

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Musty odors are caused by volatile organic compounds. While mold can be a source of these compounds, they can also come from other sources. If there is no water anywhere in the basement, then musty odors are probably not caused by mold.  If there is water, mold probably plays a role.

Actively growing mold produces a wide range of volatile compounds, some of which can impart musty odor. Many of these compounds can be detected by the human nose at very low concentrations. Mold colonies do not have to be sporulating to release these compounds, so that nearly invisible mold can be the source.

When you see carpeting on a basement floor, it may be safe to assume that it is the source for any musty odors that might be present, even if the carpeting looks new and dry and clean. Removal of the carpeting can sometimes end the odor problem. Mold does occur behind paneling if the wall is damp, and drying the wall is the only solution. Such drying may or may not involve removing the paneling. In both these cases, airborne spore concentrations can be very low. This is an indication either that the mold producing the odor is not sporulating, or that any spores that are produced are trapped and not entering the air.

Wet concrete has an odor that could be interpreted as musty. While mold can grow on the surface of concrete, it isn’t always present, and just the dampness may be producing odors. Standing water usually doesn’t result in mold growth, but bacteria may grow and produce volatiles with musty odors

Dehumidification is one means for controlling both mold and damp concrete odors discussed above.

Some dry environments can have a musty odor. One cause of this odor can be called the Antique Shop Odor and can be a result of degradation of paper and very old wood.  Old waxes and polishes can also contribute.

As always It’s Best To Test

Call me with any Radon or Mold questions you may have.

Joseph Burke

RADON AND MOLD TESTING SERVICES

Phone  630.935.2888

Web:  RadonAndMoldTesting.com