Check the outside first
- Are gutters overflowing?
- Do downspouts discharge near the foundation?
- Does soil slope toward the house?
- Does water collect beside the foundation?
- Are window wells filling with water?
Watch the sump during wet weather
If the home has drain tile, heavy rain may send more water to the sump. Notice whether the pump starts normally, cycles excessively, or cannot reduce the water level.
Map the first wet spot
The first place water appears is more useful than the final puddle. A wet crack, perimeter seam, floor opening, or isolated wall section can point toward different repair options.