Three sources of crawlspace water
Supply and drain pipes often run through the crawlspace on their way to the kitchen and bathrooms. A cracked supply line, a frozen pipe near a foundation vent, or a leaking drain joint can soak the soil or vapor barrier for weeks before anyone notices a smell or a soft floor.
Rain and snowmelt are the second source. Downspouts that dump next to the foundation, soil that slopes toward the house, or window wells and foundation vents at ground level can let surface water run under the house after storms. The third source is groundwater rising during very wet periods, which is less common but more persistent.
Whatever the source, a wet crawlspace raises humidity in the floor framing and the rooms above, and it can lead to musty smells, sagging insulation, rusting ductwork and wood decay over time.
Clues to the source
- Water after every storm
- Points to drainage: downspouts, grading, window wells or vents.
- Water with no rain
- Points to plumbing. Watch the water meter with all fixtures off.
- Water near one spot
- Look directly above it for the kitchen, a bathroom or the water heater.
- Sewage smell
- Points to a drain or sewer line leak. Treat the area as contaminated.
Checking it safely
Look before you crawl
From the access opening, shine a light in. If water is standing near wiring, a junction box or a furnace, do not enter. Turn off power to the area first if you can.
Protect yourself
Wear old clothes, gloves, eye protection and a mask. Crawlspaces can hold sharp debris, insulation fibers, pests and contaminated water.
Find the wettest spot
Note where water is deepest and whether a pipe above it is dripping. Photograph pipes, insulation and the vapor barrier.
Stop what you can
Close the main if a supply line is leaking. Redirect downspouts away from the house if storms are the cause.
Get help to remove water and dry
Pumping out the water, replacing soaked insulation and drying the framing usually needs specialized equipment and someone comfortable working in a tight space.
Common questions
Is a little standing water after a big storm normal?
Not really. It means water is reaching the foundation. Better drainage at the surface is usually the cheapest fix.
General information for Englewood, not a quote or professional advice. In an emergency, call 911.