Four ways water gets into a basement
| Source | What you see | Usual plumbing-side answer |
|---|---|---|
| Seepage through walls or the wall-floor joint | Damp patches or dripping after heavy rain | Interior drain tile that leads to a sump pit |
| Groundwater under the slab | Water rising through floor cracks or the drain | Sump pit and a working pump |
| Failed or overwhelmed sump pump | Pit full, pump silent or running nonstop | Pump repair or replacement, check valve and discharge line |
| Sewer backup | Dirty water from the floor drain or lowest toilet | Camera inspection, cleaning, and a backwater valve where appropriate |
The fourth row is a health matter. Sewage in a basement needs careful handling, and we do not treat it as a seepage problem.
What July 2017 showed about this city
A documented storm and what came after
Lake County's stormwater plan records that on July 11 and 12, 2017, three to seven inches of rain fell across the area. A post-event survey in North Chicago found 10 flood problem areas affecting 23 properties, including 3 sewer backups.
The same plan describes repeated flood damage along the Skokie River and Route 41 corridor, tied to undersized culverts, and first-floor flooding at the Strawberry Condominiums in two incidents between 2013 and 2019. A FEMA-funded storm sewer project now targets undersized pipes at Berwyn and Bittersweet Avenue and culvert work on the Skokie River.
For a homeowner, the lesson is practical. Public projects reduce risk over time, but they do not dry your basement today. Near that corridor or far from it, a working sump pump and a clear sewer lateral are the home-side defenses.
The plumbing fixes we handle
Sump pit and pump
Install or replace a pump, add a check valve and make sure the discharge line sends water away from the foundation.
Interior drain tile connections
Tie collected water to the sump so it leaves the basement instead of sitting.
Backwater valve
A one-way valve on the sewer line that can reduce backup risk, installed where the setup allows.
Floor drain and trap work
Clearing and resetting drains that gurgle, smell or overflow in heavy rain.
Pump work has its own page. See sump pump repair for failures, noises and float problems.
Clean water in, or sewage up?
North Chicago's sewage goes to the North Shore Water Reclamation District, which states that the sanitary and storm sewers in its service area are separate and that there are no combined sewers. That helps in one way. Storm water does not share a pipe with sewage on the district side.
It does not rule out backups. Roots, grease and breaks in a lateral can cause a backup in any weather. If your floor drain overflows even on a dry week, ask for a sewer camera inspection before you buy waterproofing.
How we investigate a wet basement
Ask when it happens
Only in heavy rain, in spring thaw, after laundry day or every week? The timing separates seepage, groundwater and drains.
Walk the exterior
We note downspout outlets, grading toward the foundation and window wells.
Inspect the pit, pump and drains
We test the pump, check the discharge and flow-test floor drains.
Rule out supply leaks
A dripping pipe or a leaking water heater can look like seepage, so we check those first and use leak detection when the source hides.
Recommend in order
Cheap fixes first, bigger work only if the evidence calls for it.
Where waterproofing ends and a foundation contractor begins
We say it when it is not our job
We do not dig out foundation walls, apply exterior membranes or repair structural cracks. If a wall is bowing or a crack keeps widening, call a foundation specialist or structural engineer. If the water comes from plumbing or a sump, we can fix it.
We also do not assume every house has a basement. Some North Chicago homes sit on slabs or have crawl spaces. If you are not sure what you have, send a photo and we will tell you what we would look at.
What drives the price of a dry-basement plan
What changes the price
A new pump is a small job. A drain tile system is a project. These factors move the number.
Describe your basement and get a clear price before work starts.
Call (847) 281-8626Wet basement questions
Yes. We are open 24/7, and active flooding or a sewage backup is urgent. Planned waterproofing visits are scheduled for the same day when available.
Sometimes. A leaking pipe, a failed pump and a sewer backup are plumbing problems. A bowed wall or exterior drainage fault may need another trade.
It can for groundwater and drain tile. It does not seal a wall or stop a sewer backup, so we confirm the source first.
Ask North Chicago's Inspection and Permit office, because the public pages do not spell out sump or backwater valve rules. We can explain what we plan to install.
Wear gloves and boots, keep children and pets out, and ask your insurer about professional cleanup. Sewage is a health risk.
Yes. We also work in Lake Bluff, just south of the city line.
Start with where the water comes from
Call and tell us when your basement gets wet. We will look at the cause and give you a clear price.
Call (847) 281-8626