Warning

Moisturein a basement can createmold and mildew, as well as ruin flooring and wall materials.

And this backfill can settle more than the surrounding undisturbed soil.

Over time, the backfill compresses, creating a slope (grade) that angles downward toward the foundation.

Basement window opening with bars above and surrounded by rocks and plants

The Spruce / Margot Cavin

This can involve trucking in substantial amounts of soil to reverse the direction of the slope.

This can be a difficult problem to correct.

Driveway slabs sometimes develop sunken areas near roof gutter downspouts.

Manicured landscape grade checked for wet basement

The Spruce / Margot Cavin

Each rainstorm will dump water from both roofs onto the driveway.

Roof downspouts can add a literal flood of water to areas prone to drainage problems.

A 1,500-square-foot roof will shed around 940 gallons of water in a 1-inch rainstorm.

White stone walkway next to grass lawn checked for slope causing wet basement

The Spruce / Margot Cavin

Downspouts often dump water right at the base of the foundation.

But the vast amounts of water flowing off a roof can easily overwhelm such systems.

Also, check that the gutters are clean and flowing properly.

Driveway slope of green and brick house checked if causing wet basement

The Spruce / Margot Cavin

Most neighbors will take measures to correct the problem if you diplomatically draw attention to the issue.

One solution for water runoff problems is called aFrench drain system.

This is a landscape project in which a gravel-filled trench helps to direct water in the direction you want.

Roof downspout discharge gutter checked for wet basement on side of brick house

The Spruce / Margot Cavin

Friendly neighbors might even be willing to share the cost of installing such a system.

Subsurface groundwater is part of the natural water cycle.

It comes from precipitation that infiltrates under the ground.

Neighbor’s house with roof downspout discharge gutter checked for wet basement

The Spruce / Margot Cavin

see to it your floor slopes toward the drain in your basement floor as well.

Finally, you could opt to waterproof your foundation wall.

Hire a professional to install a waterproof barrier around it, which will aid in keeping water out.

Seek a licensed plumber for broken pipes or to install a sump pump.

For major floods, a water mitigation company can remove water and dry out a basement.

If there are more than 2 inches of standing water, buy or rent a submersible sump pump.

Remove any wet carpet and insulation and damaged drywall immediately.

Dry out furniture, walls, and any items kept in your basement.

Salvaged items need to be thoroughly cleaned and sanitized.

From the inside, broken pipes or leaky appliances can flood basements with water.

Several external sources can cause moisture in a basement.

From below, groundwater can also leak into a basements walls and cracks in the floor.

Homeowners and Renters Guide to Mold Cleanup After Disasters.

Centers for Disease Control.