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My uncle said to always set posts in concrete, even for a basic chain link job.
He claimed it was the only way to stop leaning over time. I did a 200 foot run in a new development last spring and followed his advice. The ground was heavy clay and after the first big rain, three posts cracked right at the base from the pressure. A guy I met at a supply house later said in that soil, you need to use gravel for drainage and let the posts flex a bit. Who's right here, the concrete camp or the gravel crew?
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felixhenderson4mo ago
Yeah, that line about the "fortress" slab really hit home for me. I did almost the same thing with a concrete pad for my garden shed last year, thought I was being bulletproof and it cracked up like crazy after one winter. So your "one that felt so smart" part, man, I felt that in my bones. The thing is, concrete is amazing until the ground decides to move, and when it does, your rigid setup just gives up. I think your uncle meant well but maybe he never messed with heavy clay, because that stuff is like a living thing when it gets wet and freezes. Gravel crew all the way here too, at least for any soil that likes to play games with your hard work.
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mia_baker6mo ago
Ever notice how a lot of old rules break when the conditions change? Your uncle's concrete rule works in stable, dry soil, but like @paul_ramirez found out, heavy clay is a different beast. It holds water, freezes, and pushes hard, so a rigid post just snaps. The gravel method isn't worse, it's just right for that specific, tricky ground.
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paul_ramirez6mo ago
Man, that's the kind of mistake you only make once. I went all-in on concrete for a little shed base in my backyard, same clay situation. Poured it like a fortress, felt so smart. Next spring, the whole slab looked like a tiny earthquake hit it, just hairline cracks everywhere from the freeze and push. So yeah, I'm firmly in the gravel crew now for anything in that heavy, wet ground. Lets the water drain and gives it room to move without breaking. Your uncle's method works great until the dirt decides to fight back.
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