Will mold die if it dries out?
Mold does not dry out and die but remains inactive for a while if moisture is not available. This means that it can still grow back and multiply when it is exposed to any sources of moisture. Professional mold remediation and moisture control help to keep mold at bay.
Once mold spores dry out, they are temporarily inactive. However, they can still cause uncomfortable symptoms and allergic reactions in humans such as itchy eyes, runny nose, skin rashes and coughing/sneezing. In addition, dry mold spores are very light and can become airborne quite easily.
Additionally, even fungus that lies dormant in one place can threaten the health of those who live there. For these reasons, any and all fungal spores need to be physically removed from the premises. It's not enough to merely “kill” the mold. The spores need to be taken out of your home for good.
FACT: It is important to dry water damaged areas and items within 24-48 hours to prevent mold growth. FACT: Clean and dry any damp or wet building materials and furnishings within 24-48 hours to prevent mold growth.
In some cases, mold in your home can make you sick, especially if you have allergies or asthma. Whether or not you're allergic to molds, mold exposure can irritate your eyes, skin, nose, throat, and lungs.
Certain molds produce mycotoxins which, depending on the exposure level, can cause health effects. Both active and inactive molds can pose potential health hazards. Health effects from mold can be acute from short-term high exposures or chronic from long-term exposure to lower levels.
Does Mold Smell? The short answer to this question is yes, mold does have a distinct odor. The best way to describe the scent is “musty” or “earthy.” Some individuals even compare it to the smell of sweaty socks.
Both active and inactive mold can have a distinctive smell, which most people describe as musty. Active mold in the early stages of a bloom has hair-like filaments in webs, which develop a more bushy appearance as the bloom matures. This is more easily seen under magnification.
Mould spores remain airborne for an indefinite period of time. It's important to recognise that if a damp spot is present and unattended for longer than 24 hours, there is a high possibility that mould could fester and airborne spores begin congregating throughout the premises.
Spraying, Bleaching, or Killing Mold Does Not Kill All of the Spores. First of all, after spraying or gassing "toxic mold" or "black mold" in a building, the bad truth is that the mold is not dead - at least not all of it. Even if you spray bleach all over your "black toxic mold" you won't kill every single spore.
Do you have to throw everything away with mold?
This is why many toxicologists recommend homeowners treat moldy belongings ASAP. Damaged items should be thrown away without question, and items that are easy to replace or inexpensive (i.e. clothes, food) should be tossed as a precautionary measure. Basically, it's better to be safe than sorry.
Mould spores remain airborne for an indefinite period of time. It's important to recognise that if a damp spot is present and unattended for longer than 24 hours, there is a high possibility that mould could fester and airborne spores begin congregating throughout the premises.

Certain molds produce mycotoxins which, depending on the exposure level, can cause health effects. Both active and inactive molds can pose potential health hazards. Health effects from mold can be acute from short-term high exposures or chronic from long-term exposure to lower levels.
Active mold is soft and may smear when touched with a fine brush. It may also be slimy and damp. Inactive mold is dry and powdery and will seem to brush off materials readily.
Many people believe that once mold is dead, it is no longer dangerous—this is not the case! Whether mold is dead or alive, it can still be dangerous to your health. When mold dries out and becomes temporarily inactive, it is considered “dead” mold. This happens when mold is killed, perhaps with bleach, but not removed.