Determine where the moisture is coming from and take steps to prevent it. You may have a leaky roof, crack in the foundation or runoff from rain that is not directed away from the house. Find the problem and repair it calling in professionals as necessary.
Remove all debris from the crawlspace, such as cardboard boxes and especially fiber-glass insulation as these things encourage mold growth and vermin habitation.
Lay a moisture barrier on the clean floor and extend it upwards to the walls, but not covering any windowsills or frames.
Install a dehumidification system within the crawlspace. Set the dehumidifier at 45% RH or lower as that will give the crawlspace an all-around balanced level of decreased humidity. It will also give the room some heat which will help it dry out.
Things You Will Need
- Garbage bags
- Moisture barrier
- A moisture barrier is an enormous plastic sheet, often with anti-fungal properties that prevents moisture from entering a space from the outside. However, if the proper precautions are not taken in step 1, this measure will become ineffective.