# Sewer Pipe Lining in Denver

Pipe lining rebuilds a failing sewer line from the inside. A resin-saturated liner is installed through existing access and cured in place, forming a new pipe within the old one without trenching the length of the run.

- Cured-in-place lining for deteriorated sewer pipe.
- No trench along the length of the line.
- Seals cracks, joints, and root entry points.
- Inspection first to confirm the line is a candidate.

## When the Pipe Is Failing but the Route Is Fine

Plenty of sewer lines are in the right place at the right slope and are simply worn out. Old clay with separated joints, cast iron losing wall thickness, and lines with root intrusion at multiple joints all fall into this category.

Digging up a line whose only problem is its condition is often unnecessary. Lining addresses the condition and leaves the driveway, the trees, and the patio where they are.

- Root intrusion at several joints along the run.
- Cracked or separated clay pipe with correct slope.
- Corroded cast iron losing wall thickness.
- A line running under a driveway, patio, or mature landscaping.
- Repeat repairs on different sections of the same line.

## Not Every Line Is a Lining Candidate

Lining requires a host pipe that still holds its shape and a run without severe sags or misalignment. A collapsed section, a badly bellied run, or a line that needs a slope correction is a replacement job, not a lining job.

We camera and measure before recommending lining, because installing a liner in a pipe that should have been replaced is an expensive way to postpone the same problem.

- Confirm the host pipe holds shape and alignment.
- Check for sags that lining would permanently lock in.
- Verify access points at both ends of the run.

## How Pipe Lining Is Installed

1. **Inspect and Measure** Camera inspection confirms candidacy and establishes the exact length and diameter of the run.
2. **Clean the Host Pipe** The line is jetted and cut clean so the liner bonds to pipe wall rather than to grease and root hair.
3. **Install and Cure the Liner** A resin-soaked liner is drawn or inverted through the run and cured, forming a jointless pipe inside the old one.
4. **Reinstate and Verify** Connections are reopened as required and a final camera pass confirms the finished line.

## Lining Cost Compared to Open Replacement

Lining is often priced close to open replacement on the pipe alone, and comes out ahead once surface restoration enters the picture. Replacing concrete, hardscape, or mature landscaping is frequently the largest line item on an excavation job.

We quote lining and excavation against each other so the comparison includes restoration rather than hiding it.

## Frequently asked questions

**How long does a liner last?**

Cured-in-place liners are engineered for a multi-decade service life, comparable to a new pipe, provided the host pipe was a proper candidate.

**Does lining reduce the pipe diameter?**

Slightly, and the smooth jointless interior usually offsets it. Flow capacity after lining is typically equal or better than the old rough pipe.

**Will lining stop tree roots?**

Yes, for the lined section. A continuous liner removes the joints and cracks roots were entering through.

**Can a collapsed line be lined?**

No. A collapse, a severe sag, or a slope problem calls for replacement. That is exactly what the inspection is for.

**How much digging does lining involve?**

Access pits at the ends of the run rather than a trench along it. On many properties that is the difference between a lawn repair and a driveway replacement.

## Trenchless and Repair Alternatives

- [Trenchless Sewer Line Repair](https://www.denversewerandwater.com/sewer-lines/trenchless-sewer-line-repair/denver-co) The broader family of no-dig repair and replacement methods.
- [Sewer Line Replacement and Installation](https://www.denversewerandwater.com/sewer-lines/sewer-line-replacement-installation/denver-co) Full replacement when the host pipe cannot be lined.
- [Sewer Scope and Video Inspection](https://www.denversewerandwater.com/sewer-lines/sewer-line-scope-video-inspection/denver-co) The inspection that decides whether lining is viable.
- [Sewer Cleaning and Hydro Jetting](https://www.denversewerandwater.com/sewer-lines/sewer-line-cleaning-hydro-jetting/denver-co) Host pipe cleaning required before any liner goes in.

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Denver Sewer and Water is a privately owned, licensed and insured plumbing contractor. We are not affiliated with, endorsed by, or connected to Denver Water, the municipal water utility, or any government entity. To pay a municipal water bill or reach the public utility, visit denverwater.org.

Source: https://www.denversewerandwater.com/sewer-lines/sewer-pipe-lining/denver-co