Finally won the battle against invading tree roots

I’ve had mixed luck with liners, honestly. One time, I thought I’d save myself a headache and went with a liner for a rental’s old clay pipe - looked fine at first, but a year later, roots found their way right through a tiny gap at the joint. Ended up digging anyway. Maybe it’s just my luck, but I’m always a bit skeptical now. Trees really do have a mind of their own... I swear, they’re relentless. Sometimes I wonder if just replacing the whole run is less hassle in the long run, even if it costs more upfront.

Honestly, I get where you’re coming from. Liners can be a gamble, especially with old clay. If there’s even a tiny offset or crack, roots will sniff it out. Full replacement’s pricey, but at least you know it’s done right and you’re not patching up problems every couple years. Sometimes the upfront pain is worth avoiding the repeat headaches... those roots are ruthless.

If there’s even a tiny offset or crack, roots will sniff it out.

That’s exactly what worries me about liners, especially since I’m trying to avoid unnecessary waste and chemicals. I get that full replacement is more reliable, but I wonder - has anyone tried any of the newer root barriers or eco-friendly deterrents? I’ve read mixed things about copper strips and natural root inhibitors. Curious if those actually work long-term, or if it’s just another patch job.

- I’ve seen copper strips work in the short term, but roots seem to figure it out after a couple years.
- Natural inhibitors are hit or miss - depends on the tree species and soil type, honestly.
- Full replacement is pricey, but I get why folks go that route for peace of mind.

Has anyone actually had luck with those root barriers over, say, five years? Or do they just delay the inevitable?

Title: Finally won the battle against invading tree roots

I’ve put in a handful of those heavy-duty plastic root barriers over the years, and honestly, they’ve held up better than I expected. The trick is making sure they’re deep enough - like, at least 2 feet. Anything less and those roots just laugh and go under. I’ve seen some jobs where folks only went a foot down, and yeah, roots found their way around in a couple seasons.

Five years out, the barriers I helped install are still doing their job, but I won’t pretend they’re a magic fix. Trees are stubborn. If there’s water or nutrients on the other side, some roots will try to sneak around or even over the top if there’s enough mulch or loose soil. I’ve had to go back and check a couple spots where the barrier shifted or settled weird, but nothing catastrophic.

Copper strips are a neat idea, but like you said, roots seem to adapt. I’ve dug up lines where the roots just grew right over the copper like it was a minor inconvenience. Natural inhibitors? Mixed bag. I tried that on a willow once, and it was like giving it a challenge.

Full replacement is definitely the “sleep at night” solution, but it’s a wallet-buster. If you’re dealing with a monster tree or old clay pipes, sometimes it’s the only real answer.

If you go the barrier route, just make sure you overlap the sections and tamp the soil back in tight. And don’t trust the “easy install” ones from the big box stores - spend a little more for the thick stuff. It’s not glamorous work, but it beats digging up roots every year.

Funny thing, I had a customer who swore by pouring rock salt down the toilet every month to “kill roots.” All it did was corrode her pipes and make the basement smell like a fish market. Wouldn’t recommend that one...