Three-step basement flood diagnostic

Find the Real Source of Your Basement Flooding

Answer three quick questions to see whether your symptoms point to sewer backup, groundwater seepage, or a combined older-home drainage issue.

Step 1 of 3 33%

Where do you typically see the water first entering your basement?

Where water first enters

Bubbling up from the floor drain, shower, or laundry sink.

Seeping in where the concrete floor meets the wall, or through cracks.

It seems to come from the drains AND the walls simultaneously.

Water appearance and smell

It is brown/grey, dirty, and smells strongly of raw sewage.

It is relatively clear or slightly muddy, like rainwater.

It is hard to tell, it just smells incredibly damp and musty.

Flooding timing

Suddenly, during intense and violent summer thunderstorms.

Slowly, during days of continuous rain or the spring snowmelt.

Both. Every heavy rain or thaw puts the basement at risk.

If the basement is actively flooded right now, start with the 24-hour sewage backup action plan before planning prevention work.