"Worth checking slope too before spending big bucks on repairs..."
Good point, but I'd caution against assuming slope is always the culprit. I've seen cases where homeowners adjusted slope repeatedly, yet backups persisted. Sometimes older cast iron or clay pipes deteriorate internally, causing rough surfaces that trap debris and trigger repeated clogs. Might be worth getting a camera inspection done—it's a small upfront investment that can save headaches down the road...
"Might be worth getting a camera inspection done—it's a small upfront investment that can save headaches down the road..."
Totally agree with this. A camera inspection can pinpoint exactly what's going on inside the pipe, especially if it's older cast iron or clay. Had a similar issue at my place—thought it was slope-related at first, but turned out the pipe interior was corroded and snagging debris. Once we knew exactly what we were dealing with, repairs became way less stressful and more targeted. Hang in there, you'll get it sorted...
Definitely second the camera inspection route. Had a similar headache last year—thought it was just tree roots again, but nope, turned out to be a cracked clay pipe section letting dirt in. Once we knew exactly what was happening, the fix was straightforward and way less costly than guessing around. It's frustrating now, but you're on the right track with this... you'll get there soon enough.
Camera inspections are definitely helpful, but I'd also suggest checking your vent stack. Sometimes a blockage or partial clog there can cause weird drainage issues that mimic bigger problems. Had a similar case recently where everyone assumed roots or pipe damage, but it was just a bird nest causing havoc up top... go figure. Worth a quick look before diving into more expensive fixes, right?
Good point about the vent stack—I hadn't even thought of that. But honestly, as a first-time homeowner who's already been burned by "simple fixes" turning into weekend-long nightmares, I'm still a little skeptical. I mean, bird nests causing basement floods? Sounds like something straight outta a sitcom episode, lol. Still, it's probably worth checking before shelling out for another pricey plumber visit. Guess I'll be climbing up to the roof this weekend... wish me luck.