Common Questions
How do I prevent mold in my house?
Answer
Control moisture. EPA's rule is that mold control is moisture control: mold spores are everywhere, and they only grow where something is wet. Fix leaks quickly, watch for condensation and wet spots, keep indoor humidity below 60% (ideally 30–50%), keep the air conditioner's drip pan clean and draining, vent dryers outdoors, keep water away from the foundation, and clean and dry any wet or damp spot within 48 hours.
No spray or coating makes mold go away for good if the moisture stays. EPA notes that mold will simply reappear if the source of moisture isn't fixed.
What the sources say
“The key to mold control is moisture control. Solve moisture problems before they become mold problems!”
“Maintain low indoor humidity, below 60% relative humidity (RH), ideally 30 – 50%, if possible.”
“Keep heating, ventilation, and air conditioning (HVAC) drip pans clean, flowing properly, and unobstructed.”
“Don’t let foundations stay wet. Provide drainage and slope the ground away from the foundation.”
“When addressing mold problems, don’t forget to address the source of the moisture problem, or the mold problem may simply reappear!”