Interior drain tile, sump basins, and vapor barrier wall systems installed by technicians who've done this hundreds of times in Lewiston, MN basements.
We've seen enough Lewiston, MN 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.
Most inspection requests get a same-day or next-day appointment, not a two-week wait.
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 Lewiston, MN Basement Waterproofing job starts with an inspection, not a generic package — here's what that typically includes.
The core fix for most Lewiston, MN basements: a perimeter drain cut into the slab edge, tied to a sump basin, that intercepts water before it reaches the floor.
Every drain tile system needs a properly sized sump pump — we calculate basin size and pump horsepower from your square footage and local water table depth.
The cove joint where the floor meets the foundation wall is one of the most common Lewiston, MN 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.
A technician walks the basement with a moisture meter, checking walls, floor, and cove joints to trace the water back to its actual source.
You'll see drain tile footage, sump specs, and labor broken out separately, not one vague lump-sum number.
You'll get warranty paperwork and a walkthrough of how the system works so you know what to expect going forward.
"Our finished basement started smelling musty and we finally found a wet spot behind the drywall. They cut open the cove joint, ran drain tile, and it's been dry for over a year."
— Lewiston Homeowner
"Water came in around our window well every time it rained hard. They regraded it and added a drain line — problem solved."
— Lewiston Customer
"They walked us through exactly why the water was coming in before quoting anything, which no one else had bothered to do."
— Lewiston Homeowner
"Installed a battery backup sump pump for us right before a big storm season — glad we did it when we did."
— Lewiston Customer
Every Lewiston, MN 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.
Not always — an isolated, non-leaking crack can sometimes be handled with injection alone.
Coverage depends on your policy and the cause of the water intrusion — we can document conditions for a claim, but approval is up to your insurer.
Warranty terms are often transferable if you sell the property later.
We install interior drain tile and sump systems throughout Lewiston and the surrounding Lewiston, MN service area, including the zip codes listed below.
Zip codes we serve in Lewiston, MN: 55952
One call gets you a licensed specialist, a written quote, and a same-day time window.
Call +1-866-476-1348© SGP Waterproofing. All rights reserved.
