Water Pooling in My Backyard - Worth Digging a Trench?

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“does the fabric slow down drainage at all? I’ve heard mixed things, especially if you get a lot of clay in your soil.”

I’ve used filter fabric on two properties - never noticed slower drainage, but I always use the non-woven kind. Woven stuff can be a pain in clay, though.
- Store-bought slotted pipe is worth it for me. Drilling your own holes is a hassle and never as consistent.
- Trench depth: I did 18 inches last time, but honestly, 12 would’ve worked. Overkill is real... my back still remembers.

“Woven stuff can be a pain in clay, though.”

Yeah, I’ve run into that too. On one project, the woven fabric actually seemed to trap more water than it let through - almost like a barrier. Switched to non-woven and things improved. For trench depth, I usually aim for 12-14 inches unless there’s a real slope issue. Anything deeper just feels like unnecessary work unless you’re dealing with a major water table problem. Store-bought slotted pipe is definitely less hassle than drilling your own... tried that once, never again.

Store-bought slotted pipe is definitely less hassle than drilling your own... tried that once, never again.

That made me laugh - my neighbor convinced me to try drilling my own last summer, and I swear I spent more time cleaning up plastic shavings than actually making progress. Never again for me either.

I’m curious about the non-woven fabric you mentioned. I always assumed woven was better since it seemed sturdier, but now I’m wondering if that’s just overkill for my backyard. My soil’s mostly clay too, and I’ve had standing water after heavy rain. Did you notice any difference in how fast the water drained after switching fabrics? Also, for the trench depth - if you only go 12 inches, do you still get enough flow, or does it back up during big storms? I keep worrying I’ll dig too shallow and just end up with a muddy mess instead of a fix.

Trying to keep costs down, but I also don’t want to redo this in a year.

Water Pooling in My Backyard - Worth Digging a Trench?

Funny timing - I actually switched from woven to non-woven fabric last year after reading a bunch of landscaping threads. I was skeptical at first, but the non-woven stuff is way easier to work with and doesn’t get clogged up as fast in clay. Woven felt tougher, but it seemed to slow the water down, almost like it was too dense. With the non-woven, I noticed water drained out of the trench faster after storms, but that could also be because I added more gravel around the pipe that time.

About trench depth: I went with about 14 inches because my backyard’s got a slight slope. It’s not super deep, but I haven’t had any backups yet - even after those crazy downpours last fall. I think as long as you’ve got enough slope for gravity to do its thing, you’re probably fine at 12 inches for most yards. If your yard’s totally flat though, you might need to go deeper or add more gravel underneath.

One thing I learned the hard way - don’t skimp on gravel. The first time I tried this (with just a thin layer), everything clogged up by spring and I had to dig it all out again. Total pain. Also, if you’re worried about cost, check if your local landscaping place sells “reject” or “drainage” gravel - it’s way cheaper than bagged stuff from big box stores.

Curious if anyone’s tried those pre-wrapped pipes? They look convenient but I’m not sure if they’d hold up long-term in heavy clay.

Water Pooling in My Backyard - Worth Digging a Trench?

I’ve actually messed around with those pre-wrapped pipes when I redid my side yard last summer. They seemed like a time-saver, but honestly, I wasn’t all that impressed once I got into the nitty-gritty. In heavy clay, they clogged up faster than I expected - maybe because the “sock” just isn’t as robust as a decent non-woven fabric layer. I ended up ripping them out after a year and doing it the old-fashioned way with loose pipe and wrapping it myself. Way more work, but less hassle down the road, at least for me.

And on the topic of gravel, totally agree - skimping is a rookie mistake. First trench I ever dug, I cheaped out and just used leftover pea gravel from another project. Regretted it big time once spring hit and everything turned into a swampy mess. Lesson learned: spend the extra, or you’ll pay for it later with your back.

Not sure if I buy the “just 12 inches is fine” thing for everyone, though. If your soil’s really compacted, sometimes even a deeper trench doesn’t cut it unless you give that water somewhere to go. Sometimes I wonder if dry wells are worth the extra effort...