Interior drain tile, sump basins, and vapor barrier wall systems installed by technicians who've done this hundreds of times in New London, WI basements.

We've seen enough New London, WI basements to know that a wet spot in one corner rarely tells the whole story. Before we recommend drain tile or a sump upgrade, we trace the water back to where it's actually entering, not just where you noticed it.
Every technician carries full state licensing and liability coverage before they ever step into your basement.
Our New London, WI crews are staffed locally, so a wet basement call doesn't sit in a national queue for a week.
No hourly billing and no change orders once your basement floor is already open.
Thermal imaging helps us confirm whether a stain is active moisture or an old, already-fixed leak.

Every New London, WI Basement Waterproofing job starts with an inspection, not a generic package — here's what that typically includes.
We route drain tile beneath the existing slab line so flooring disruption stays minimal during installation.
Battery backup is available for any sump system, so a power outage during a storm doesn't undo the whole fix.
The cove joint where the floor meets the foundation wall is one of the most common New London, WI leak points, and we seal it as part of every interior system.
We install membrane on masonry walls before any insulation or framing goes up, so moisture never gets a chance to reach finished materials.
Window wells that hold water after a storm are a direct pressure point against the glass and frame — we add gravel beds and drain lines tied into the main system.

You describe what you're seeing — a wet spot, a musty smell, standing water — and we get a rough read on urgency before dispatching anyone.
We also check exterior grading and downspouts, since a lot of basement leaks start outside, not inside.
We explain the reasoning behind the recommended system so you know exactly what you're paying for and why.
You'll get warranty paperwork and a walkthrough of how the system works so you know what to expect going forward.

"We'd patched a basement crack twice ourselves before calling. The interior drain tile system actually fixed it instead of just hiding it again."
— New London Homeowner
"Sump basin was undersized from the last owner's DIY job. They resized it and we haven't had a drop since."
— New London Customer
"They walked us through exactly why the water was coming in before quoting anything, which no one else had bothered to do."
— New London Homeowner
"Basement had been damp for years. Drain tile and a new sump system fixed it in three days."
— New London Customer
Every New London, WI quote is itemized in writing so you can see exactly what drives the total.
Yes — interior drain tile requires cutting a channel along the slab edge, which we patch with concrete once the system is installed.
Larger basements or those needing extensive crack repair can take a bit longer — we'll give you a realistic timeline in the written quote.
If the crack is actively weeping or part of a larger drainage issue, we'll recommend a full system instead of a spot fix.
We provide photos and moisture readings that many New London, WI homeowners have used to support a claim.
Yes, every interior drain tile and sump installation comes with a written warranty, explained in full before you approve the quote.
We install interior drain tile and sump systems throughout New London and the surrounding New London, WI service area, including the zip codes listed below.



Zip codes we serve in New London, WI: 54961
Call now for a free inspection and a flat-rate quote before anything gets worse.
Call +1-866-476-1348© SGP Waterproofing. All rights reserved.