SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/home-a-mold-needswater

What do all indoor molds need in order to grow?

Water or moisture.

Start playing free

  1. Water or moisture ✔
  2. Direct sunlight
  3. Freezing temperatures

Why: EPA says mold may begin growing indoors when spores land on wet surfaces, and none of the many types will grow without water or moisture. That is why fixing leaks is the first step.

Huh, didn't know that: Mold spores are invisible to the naked eye and float through outdoor and indoor air.

The dad joke
Why do toadstools grow so close together? They don't need mushroom.
Like this card?
Play the game

References

Answer: Water or moisture. EPA says mold may begin growing indoors when spores land on wet surfaces, and none of the many types will grow without water or moisture. That is why fixing leaks is the first step.

  1. EPA: A Brief Guide to Mold, Moisture and Your Home www.epa.gov/mold/brief-guide-mold-moisture-and-your-home
    none of them will grow without water or moisture
    Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Home & YardHow soon should you dry a water-damaged area to prevent mold growth?Home & YardWhat indoor humidity does EPA say is ideal for discouraging mold?Home & YardUp to about how big a moldy patch can you usually clean yourself, per EPA?

That's stuff everyone should know.