Common warning signs
Homeowners usually notice musty air, cupped floors, wet insulation, visible condensation, pests, wood discoloration, doors sticking, or a damp smell that is stronger after rain or during humid weather.
Do not jump straight to a product
A dehumidifier can help the right crawl space, but it will not solve water entering from outside. A vapor barrier helps ground moisture, but it cannot correct downspouts dumping next to the foundation. The real win is matching the fix to the source.
What to document
- When the smell or moisture gets worse.
- Whether there is standing water or only humidity.
- Any plumbing, HVAC, or ductwork under the house.
- Photos of insulation, ground cover, vents, and foundation walls.