The traditional way to fix a failed sewer lateral is to dig it up: open a trench from the house to the main, replace the pipe, backfill, and leave the homeowner to sort out the lawn, the driveway, or the parking lot afterward.
For a lot of failures, that is no longer necessary. Trenchless methods repair or replace the line with access at one or two small points instead of a trench across the whole run — and for a commercial property, the difference between the two approaches can be the difference between a weekend of work and a month of closed parking.
It starts with a camera
No competent recommendation gets made without one. A camera inspection tells you what is actually wrong, where, and how bad — and those three facts determine whether trenchless is even an option.
Our inspectors are PACP certified, which is the national standard for coding pipe condition. It matters because it means the assessment follows a defined scoring system rather than one technician's impression, and it produces documentation you can hand to an insurer or a buyer.
Method 1: Pipelining
Also called CIPP — cured-in-place pipe. A resin-saturated liner is pulled or inverted into the existing pipe and cured in place, forming a new jointless pipe inside the old one.
It works well for:
- Cracked or fractured pipe that still holds its shape
- Root intrusion through joints — the liner seals the joints permanently
- Corroded cast iron with a sound outer wall
- Runs under a driveway, a foundation, a mature tree, or a parking lot
Before lining, the host pipe has to be cleaned properly — scale and root mass removed all the way to the pipe wall. We use Picote high-speed cleaning and brushing equipment for that, which is also a standalone service for pipes that need descaling but not lining.
Where lining does not work
A pipe that has collapsed, has lost its shape, or has separated at a joint with significant offset cannot be lined — there is nothing left to line against. A camera inspection identifies this immediately.
Method 2: Directional boring
Rather than rehabilitating the old pipe, directional boring installs a new line underground along a steered path, with entry and exit pits at each end and no trench in between.
This is the method for:
- Water service lines
- Running a new sewer line on a different path when the old one is unsalvageable
- Going under a road, a driveway, a creek, or a mature tree you are not willing to lose
- New utility runs on commercial and municipal projects
When digging is still right
Trenchless is not universally superior and we will say so:
- A fully collapsed line under an open lawn with easy access is frequently cheaper and faster to open-cut.
- A localized failure in one accessible section does not justify lining the whole run.
- Some pipe materials and diameters are outside what lining can address.
- If the line is shallow, short, and the surface above it is grass you were replacing anyway, the math often favors excavation.
The honest test is total cost, not method: the pipe work plus restoring what got removed to reach it. Trenchless usually wins under concrete, asphalt, and mature landscaping. Open-cut often wins under a plain lawn.
Why this matters more for commercial property
For a school, an apartment complex, or a retail property, the disruption cost frequently exceeds the pipe cost. Trenchless methods keep the operation running — which is why we have taken on projects like school and apartment building repiping without shutting the buildings down.
If someone has quoted you a trench, ask us for a camera inspection and a second opinion before the excavator shows up.