Residential Sewer Pipe Lining
Residential sewer line repair for Denver homeowners
The sewer lateral is the one pipe on a Denver property that the owner cannot see and usually cannot avoid paying for. This page explains how houses of different ages fail, how to read a sewer scope at sale, and how a repair gets done without trenching the yard.
Three ages of Denver housing, three ways to fail
Walk a block in one of the pre-1960 Denver neighborhoods and you are walking over clay tile laid in short sections with mortar or tar joints, each one a seam that expansive clay has been working at for seventy years. Inside the foundation the line is cast iron, and under a basement floor it corrodes from the bottom up until the invert is rough as a rasp and sometimes gone altogether. The postwar subdivisions ringing the older core got Orangeburg, which is layered fiber and pitch; after decades in wet clay it blisters, ovals and finally folds. The PVC that replaced it after about 1975 does not rot or corrode, but a PVC joint can still pull apart when heaving soil lifts one side of the pipe and drops the other.
How the roots and the clay work together
Bentonite clay is the common enemy. It takes on water in the March thaw and the August thunderstorm and gives it back during the long dry stretches between, and every cycle moves the pipe a fraction. The joints open first. Then the silver maple in the parkway, the cottonwood by the alley or the elm in the neighbor's yard sends a root into the gap, because the inside of a sewer is the wettest, richest soil for a hundred feet in any direction. Roots widen the joint, the joint lets more water in, the wet clay around it swells, and a section settles into a belly where paper and grease collect. The process is slow until the night it is not.
What the house tells you first
The earliest signs are quiet. A floor drain that gurgles when the washing machine drains. A toilet in the basement that needs two flushes. A patch of lawn over the lateral that stays green through a dry July. Sewer smell near the foundation after a storm. By the time sewage is on the basement floor the line is either fully blocked or has collapsed, and the question is no longer whether to repair but how. Calling at the gurgle stage gives you a scheduled camera visit instead of an emergency.
Reading a sewer scope at sale
Sewer scopes are now routine in Front Range real-estate transactions, and a great many Denver laterals are first inspected the week a house goes under contract. If you are the buyer, insist on the video file and a locate, not a two-line summary. If you are the seller, do not negotiate against a description; get your own camera run so the defects have footages and depths attached. Roots and offsets in clay tile, the most common finding in Denver County, are a one-day lining job with a written warranty that transfers to the buyer. A belly is a different conversation and the locate tells you exactly where the dig would be. Both sides are better off knowing which one they have.
Fixing it without a trench down the yard
For the typical Denver house the repair starts at a cleanout, or at a small pit dug where the lateral leaves the foundation if the house has no cleanout. After the line is jetted clean and inspected again, a resin-saturated liner is inverted or pulled through the entire run to the main and cured with hot water or steam, usually in one working day. The result is a jointless pipe inside the old one. If the old pipe is collapsed or Orangeburg has folded, the crew pulls new HDPE through the old path from a pit at each end instead. If one joint is bad and the rest is sound, a short sleeve fixes just that spot. All Sewer and Plumbing Services, LLC's page for homeowners in Denver explains how All Sewer and Plumbing Services, LLC runs these jobs on Denver properties. For the background on liners themselves, see curedinplacepipe.net, the independent lining reference.
Permits, the public side and the paperwork you keep
In Denver, as in most of the region, the lateral is yours all the way to the main, including the part under the sidewalk and street. Work there needs a right-of-way permit and a licensed contractor, which is why a trenchless repair that reaches the main from your side of the property line saves both pavement and permit scope. The lateral permit itself is still required for most repairs, and the inspector's sign-off plus the post-repair video belong in your records with the warranty. Installer verification standards for lining contractors are published at the installer's listing on the CIPP verification site. When you are ready for a camera in the line, call (720) 606-6223. Estimates are free. Call now.
Estimates are free. Call now: (720) 606-6223.
Residential services in Denver
Trenchless Sewer Repair
Repair or replace a failed sewer line with little or no excavation.
Sewer Pipe Lining (CIPP)
A resin-saturated liner cured in place forms a new, jointless pipe inside the old one.
Pipe Bursting
A bursting head splits the old pipe while pulling new HDPE pipe in behind it, through two small pits.
Sectional Point Repair
A short liner fixes one bad spot and leaves the rest of a sound line alone.
Sewer Camera Inspection
See what is actually wrong before anyone quotes a fix.
Hydro Jetting
High-pressure water strips roots, grease and scale so the pipe can be inspected and lined.
Sewer Line Repair & Replacement
When a line cannot be lined: spot excavation or trenchless replacement, chosen from the footage.
Questions about residential work in Denver
My plumber cables the line every spring. Is that a repair?+
It is maintenance that buys time. Cutting roots leaves the opening they came through, and each cut stimulates regrowth from the root mass outside the pipe. If the camera shows roots at several joints along clay tile, a liner seals every joint at once and ends the annual visit; a single bad joint can be sleeved instead.
The basement floor drain backs up only during heavy rain. What does that mean?+
Infiltration. Rain and snowmelt are entering the lateral through open joints or cracks, and the pipe cannot carry the extra flow. In Denver that pattern almost always traces to clay tile joints opened by soil movement. A camera run during dry weather will still show the joints, and a liner stops the water at its source.
Will the repair wreck my lawn and the city's tree lawn?+
A lining job needs a cleanout or one small pit near the house and leaves the rest of the yard untouched. Bursting needs a pit at each end, typically a few feet square. Only a belly or a collapse that cannot be burst calls for a trench along the pipe, and that section is restored as part of the job.
I am selling and the buyer's sewer scope found problems. What are my options?+
Ask for the buyer's video, then get your own camera run with a locate so the findings are measured, not described. Most scope findings in Denver County are roots and offsets in clay, which a liner or sectional sleeve fixes in a day with a transferable written warranty. That is usually a better position than a credit negotiated against an unknown.
Who do I call if I am not sure whether it is urgent?+
Call anyway. A backup into the lowest fixture is urgent; a slow drain or a gurgle is a warning that can be scheduled. The call sets a camera visit, and the video decides the rest; the quote follows the footage, never the other way around. Estimates are free; call now.