Moisture & Water

Water damage is rarely announced by a single dramatic event. More often it starts as an unexplained bill, a meter that keeps moving when it shouldn't, or a spot that seems damp for no obvious reason -- and the homeowners who catch it early are the ones who know how to read those small signals before they become a bigger repair.

The guides here focus on using the water meter, simple visual checks, and EPA WaterSense guidance to figure out whether water is moving somewhere it shouldn't be, and when the evidence points toward a professional rather than more guessing.

How we think about moisture and water

Every guide in this section follows the same approach:

Guides

Illustration of a residential sump pump, float, pit, and discharge line before heavy rain.

How to Test Your Sump Pump Before Heavy Rain

Before heavy rain, check that the discharge line outside is clear and points away from the foundation, then slowly add water to the pit and confirm the float activates the pump, the water level drops, and the pump shuts off normally -- and verify any battery backup separately, since power outages often come with storms.

Illustration of rainwater flowing from a gutter and downspout away from a home's foundation.

How to Check Drainage Around Your Foundation After Heavy Rain

After heavy rain, walk the property from safe ground and look for water pooling beside the foundation, downspouts discharging against the wall, soil sloping toward the house, and damp basement or crawlspace areas. EPA recommends sloping the ground away from the foundation and keeping gutters clean, while FEMA recommends directing downspout water away from the structure and never routing it onto a neighboring property.

Illustration of a house gutter and downspout directing rainwater away from the foundation, with unsafe ladder access crossed out.

How to Check Gutters and Downspouts Before Heavy Rain Without Unsafe Roof Access

Walk your gutters and downspouts before heavy rain and watch them during rain to confirm gutters are clear of debris, downspouts are securely connected, and water discharges well away from the foundation instead of pooling or running back toward the house; after rain, check the ground for erosion, ponding, or signs that water is flowing toward the foundation instead of away from it, and treat major grading, drainage redesign, or roof access as work for a professional.

Illustration of a homeowner drying a small indoor water leak with towels and a fan while checking the shutoff valve.

What to Do After a Minor Indoor Water Leak: The First 24-48 Hours

For a minor, clean-water leak, stop or isolate the source if it is safe to do so, keep people away from any water near electrical equipment, remove accessible standing water, and dry the affected materials within about 24-48 hours; treat the water as contaminated, or the damage as extensive, and call a professional whenever you are not confident the source is fixed or the area can be dried safely.