Commercial

Commercial Sewer Line Repair in Duluth & Superior

Line the pipe under the slab instead of breaking the floor. Most buildings stay open.

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No commitment · Same-week availability · Serving Duluth & region

500+ homesServed in the Duluth region
10+ yearsIn the Duluth industry
5 StarGoogle rating · 56 reviews
The problem

A commercial line is not just a longer house line

In a house, the sewer runs from one stack out to the street. In a commercial building it collects from many places at once: restrooms on two floors, a kitchen, floor drains, a mop sink. All of those branches tie into one main, and that main usually runs under a concrete slab.

That is what makes the traditional fix so expensive. Reaching the pipe means cutting the floor, which means closing the part of the building above it.

Lining avoids the floor entirely. The catch is the branches: when a liner cures, it seals the main into one continuous pipe and closes every connection feeding into it. Those openings have to be cut back out from the inside, one at a time. That step is called reinstatement, and it is the reason most contractors will not line a commercial main.

How we do it

We cut the connections back open with a robotic cutter

After the liner cures, a robotic cutter is sent down the main. It carries its own camera, and the operator drives it to each branch, finds the dimple where the connection sits behind the new liner, and mills the opening back open. Every branch is restored before we leave.

Where a branch line is also failing, we line that too, then cut it back into the main the same way.

  • Camera inspection first, so you see the line before anything is quoted
  • The main is cleaned and lined from existing access points
  • Each branch connection is milled back open and confirmed on camera
  • No floor cut, no trench through the parking lot
  • Final camera pass before we hand it back
When it fits

And when it does not

Lining works when the pipe still holds its shape and the camera can travel the full run. Cracks, separated joints, root intrusion and corroded cast iron are all good candidates.

It does not work on a collapsed section, a line the camera cannot pass, or a main with a severe belly holding standing water. We will tell you that from the inspection rather than after the invoice.

Who this is for

Buildings we work in

  • Restaurants and commercial kitchens
  • Apartment and multi-unit buildings
  • Care facilities and clinics
  • Offices, retail and hotels
  • Schools and municipal buildings
Book an inspection Call 218-409-6356
Contour trenchless sewer repair Duluth MN
Digging Less. Solving More. Duluth, MN · Founded 2021
30–40% Skip the trench, landscaping and hassle
No concrete work

Driveways and sidewalks stay completely untouched.

Minimal landscaping

Turf, gardens, irrigation, and trees left intact.

No scheduling timelines

Most trenchless repairs are wrapped in a single day.

Get a free inspection →

Frequently asked questions

Can a commercial sewer line be lined without cutting the floor?

Usually yes. The liner is installed through existing access points and cured in place, so the slab stays intact. The connections that feed into the main are then cut back open from inside the pipe with a robotic cutter.

What is reinstatement?

When a liner cures inside a main, it seals over every branch connection feeding into it. Reinstatement is the step where each of those openings is milled back open from inside the pipe, so the branches drain again. It is the part of commercial lining that most contractors are not equipped for.

Does the building have to close?

Most of the building stays open. The affected line is out of service while the liner cures, so we plan the work around your hours and around which fixtures tie into that run. Tell us what cannot go down and we will build the sequence around it.

How long does a commercial sewer lining job take?

It depends on the length of the main and how many branch connections have to be reinstated. Many jobs are done in a day or two. We give you a schedule after the camera inspection, not before.

When is lining not the right answer for a commercial line?

If a section has collapsed, if the camera cannot travel the full run, or if the main has a severe belly holding standing water, lining will not solve it. In those cases we quote excavation or pipe bursting and say so up front.

Do you do commercial sewer work in Superior, WI?

Yes. We work commercial properties throughout Duluth, Superior, Hermantown, Proctor, Cloquet, Two Harbors and the surrounding Twin Ports area from our shop on Rice Lake Road in Duluth.

What people say

Duluth homeowners who thought their yard was gone.

The thing people say most: they couldn't tell we were ever there.

Contour Inc place picture
5.0
Based on 55 reviews
Bonnie Summers profile picture
Bonnie Summers
4 months ago
Great crew, very professional work, five 🌟 they're there when they say they're going to be there. no excuses, anything goes wrong they fix it. customer service is five star. I would call them to get the job done. I highly recommend them. Had my sewer line replaced. Everything went smoothly. Loved working with this crew/company. They made an ugly situation beautiful once again.
Jill Thunder profile picture
Jill Thunder
5 months ago
Contour was very accommodating with all the home owners insurance issues I had to sort out. They repaired my main sewer pipe (had several cracks in it) with a 50 year warranty liner. Contour's quote was half of ASP as they found a closer access point to the front of the house and inspected all my home pipes determining they were fine and did not need lining. They save people a lot of money by only lining the sq foot of pipes that need it. The crew were very polite and professional. Would definitely recommend and hire them in the future for other services.
Rod Barber profile picture
Rod Barber
5 months ago
Contour Inc. Was able to fix my sewer in a very timely manner so we could sell our house. They dug it up even in February! Very nice to deal with them.
Patrick Heaslip profile picture
Patrick Heaslip
6 months ago
From my initial conversation with Jason to my sewerlining appoint with Troy and his crew, Contour was 5 stars across the board. Everyone I spoke to was professional, knowledgeable, and patient throughout the process. They made it easy in addition to quoting a reasonable price. I would highly recommend anyone in the market for a sewerlining to consider their services.
Adam Osterlund profile picture
Adam Osterlund
8 months ago
Contour came out and was willing to work with us on a solution that would fix a leak in a very difficult water main leak. They worked quickly, professionally, and cleanly.

They were able to complete the work faster than expected, and did a great job. We really appreciate their flexibility and ability to get the job done!
Leah Holliday profile picture
Leah Holliday
8 months ago
I needed my main sewer line lined. Contour was super helpful and was able to make it work within my budget. Very prompt, professional and got the work completed that same day. Highly recommend 5 stars to this company!!
Sara K profile picture
Sara K
1 year ago
Contour is the best! Everyone treats you like an equal human and they are super knowledgeable at what they do. Brian and Co. were kind and honest from the start and very responsive. Everything was done very well and efficiently. They even came back to check on the project and touch up the blacktop they needed to patch in the alley after the job was completed. (Sewer line repair) Really appreciate you! I look forward to working with you again soon, just hopefully on an elective project and not an emergency. ;)
This is a very professional company. Not only did they actually return my request for a quote, they did it rapidly. The inspection was very thorough and was easily done. The quote was very fair, and the installation was amazing! The day of install we made room for their work, and when they left, it was cleaner than when we moved all our stuff! The workers communicated with us during the install, there was never a question about anything. Work was professional, and the out come is a sewar line I won't have to worry about again!

Thanks Contour!
Nadine Uremovich profile picture
Nadine Uremovich
2 years ago
Highly recommended! "Wow!" is the only way to describe Contour. Their crew is honest, knowledgeable, considerate, and dependable. They replaced our sewer and water line in one day. They were meticulous with clean up, too. Great people and a great company!
See what our customers are saying
Where we work

Serving Duluth and the Twin Ports.

Based in Duluth at 4958 Rice Lake Rd. We service homes and businesses across Northern Minnesota and Wisconsin. Enter your address to see how quickly we can be there.

4958 Rice Lake Rd, Duluth

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Cities we serve

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Don't tear up your yard until you've talked to us.

A camera inspection takes 30 minutes and tells you exactly what's wrong and what every option costs. Most people are relieved by that conversation.

No commitment · Same-week availability · Serving Duluth and the surrounding region