Depth definitely matters, but honestly, plastic barriers might not be your best bet for mature oaks or maples. I've seen roots from big trees punch right through plastic over time, especially if it's thinner stuff. Metal or reinforced barriers tend to hold up better long-term. If you're set on plastic though, you'd probably need to go at least 24-36 inches deep—roots can be surprisingly persistent. Just something to consider before you commit to digging that deep...
Plastic barriers can work better than you'd think, actually... if you pick the right kind. I've seen some heavy-duty HDPE barriers hold up surprisingly well against stubborn roots. Metal's great, sure, but rust and corrosion can be headaches down the line. Just something else to weigh in your decision.
"Metal's great, sure, but rust and corrosion can be headaches down the line."
Glad someone else mentioned this. A couple years back, I went with metal barriers thinking they'd be bulletproof against roots. Initially, they worked like a charm—until moisture and corrosion set in. Dealing with rust spots and weakened joints turned into a real hassle. Switched over to heavy-duty HDPE barriers last spring, and so far, it's been smooth sailing. Installation was straightforward too: just dig your trench deep enough (at least 18-24 inches), position the barrier vertically, overlap the joints properly, and backfill firmly. One tip I'd add from personal experience—make sure the barrier sticks out a couple inches above ground level. It helps prevent sneaky surface roots from hopping over.
Sounds like you're already on the right track though. Nice job finally getting those roots under control... it's always satisfying to win one of those homeowner battles, isn't it?
Good call on the HDPE barriers. I went with recycled plastic edging myself—figured it'd be eco-friendly and durable enough. Two years in, zero issues with roots or corrosion. One thing I'd add: keep an eye out for any gaps forming over time, especially after heavy rains. Roots are sneaky little things and they'll find their way through even tiny openings... learned that the hard way last summer.
Interesting to hear about your experience with recycled plastic edging—I was actually considering that myself, but ended up going with metal edging because I thought it'd be sturdier. Now I'm second-guessing myself a bit, haha. It's only been about six months, so no issues yet, but your point about gaps forming after heavy rains has me a little worried.
Speaking of gaps, did you notice if the recycled plastic edging shifted or warped at all over time? I've read mixed reviews online—some people swear by it, others say it tends to buckle or shift slightly after a few seasons. I guess it might depend on climate or soil type too. My yard gets pretty soggy after storms, and I'm wondering if that'll make things worse.
Also, since we're on the topic of sneaky roots... do you think adding gravel or sand underneath the edging helps at all? I've seen some landscaping videos recommending it for drainage and stability, but I'm not sure if that's just extra work for minimal benefit. Curious if anyone's tried that and noticed a difference.
Honestly, this whole root battle feels like a never-ending learning curve. Just when I think I've got it figured out, something else pops up. At least it's reassuring to know I'm not the only one dealing with this stuff...
