By Double J Liner Repair · Sewer Repair · Published 2026-10-23
Ask any sewer contractor in San Antonio what they find most often inside older lines, and roots will be near the top of the list. Mature live oaks, pecans, and other shade trees are a big part of what makes our older neighborhoods so appealing. Their roots are also very good at finding water.
Here is how roots get into sewer lines, why cutting them out is only a temporary fix, and how lining solves the problem at the source.
Sewer lines carry warm water and nutrients, and they give off moisture through even tiny cracks or loose joints. Roots naturally grow toward that moisture. Once a hair-thin root finds a gap, it grows inside the pipe, thickens, and spreads into a mass that catches grease, paper, and debris.
Older clay pipe is especially vulnerable because it was installed in short sections with joints every few feet. Each joint is a potential entry point.
During long dry stretches, trees search harder for water. That is when root growth into sewer lines tends to accelerate. The expansive clay soils common in the San Antonio area also shrink and swell with wet and dry cycles, which can open up joints and give roots an easier path in.
Mechanical root cutting or hydro jetting will clear the pipe, and it is a necessary step before any repair. But cutting does nothing to seal the opening the roots came through. In many cases the roots grow back thicker within months.
If you are paying to have roots cleared on a regular schedule, you are paying to manage a problem rather than solve it.
After the roots are cleared and the line is cleaned, a UV-cured liner forms a continuous, jointless pipe inside the old one. There are no seams for roots to find. The cracks and joints they used to grow through are sealed behind the new liner.
Best of all, you do not have to remove the tree or dig up its root zone to fix the pipe. The repair is done from inside the line.
Excavating near a mature tree can damage the very root system that keeps it healthy. Trenchless lining avoids that. If you value the trees on your property, a no-dig repair protects both your landscape and your plumbing.
A properly installed cured-in-place liner is seamless along its length, so roots have no joints or cracks to enter through.
No. Trenchless lining repairs the pipe from the inside, so the tree and its roots can stay in place.
Chemical treatments may slow regrowth temporarily, but they do not seal the openings roots use to get in. Lining is the long-term fix.
Double J Liner Repair offers sewer camera inspections and free estimates on no-dig sewer repair in San Antonio, backed by a 10-year warranty. Learn more about sewer repair or read more sewer and pipe repair guides.
Double J Liner Repair · 1800 NE Interstate 410 Loop #216, San Antonio, TX 78217 · Phone: (210) 802-2018 · Email: Info@doublejlinerrepair.com
Hours: Monday–Friday 8:00 AM–6:00 PM, Saturday 9:00 AM–2:00 PM, Sunday closed.