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My Adventure With DIY Concrete Foundations

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Posts: 23
(@gandalfgeocacher)
Eminent Member
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MY ADVENTURE WITH DIY CONCRETE FOUNDATIONS

Yeah, I’m with you—if your forms aren’t level or you don’t tamp the base enough, nothing else really matters. But I do think vapor barriers are underrated, even for smaller stuff. Moisture sneaks up on you... learned that the hard way under my old garden shed. Still, I get not wanting to overcomplicate a simple patio pour. Sometimes it’s just about getting the basics right and not sweating every little detail.


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Posts: 5
(@dharris49)
Active Member
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MY ADVENTURE WITH DIY CONCRETE FOUNDATIONS

- I hear you on vapor barriers—didn’t use one under my garage slab and now I get a little dampness at the edges every spring. Not a disaster, but kind of annoying.
- Forms being level is huge. I spent more time checking mine than actually pouring, honestly.
- Curious if you’ve tried fiber mesh in your mix? I read it can help with cracking, but not sure if it’s worth the extra cost for smaller jobs.


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Posts: 11
(@jong74)
Active Member
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MY ADVENTURE WITH DIY CONCRETE FOUNDATIONS

- I’ve used fiber mesh a couple times—honestly, didn’t notice a huge difference for small pours. For big slabs, maybe, but for a garage or shed? Regular rebar and good curing seem to do the trick.
- Vapor barrier regret is real. Had to deal with musty smells in a basement once because the builder skipped it. Not fun.
- Level forms are non-negotiable. I’ve seen more “wavy” patios than I care to admit...


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Posts: 0
(@driver43)
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MY ADVENTURE WITH DIY CONCRETE FOUNDATIONS

- Fiber mesh is decent, but I’m with you—on smaller jobs, it’s hard to see much benefit over just using rebar and making sure you don’t rush the cure. For a big driveway, maybe I’d double up.
- Skipping the vapor barrier is just asking for trouble. Had to rip out a section of my old workshop floor because of moisture issues... not cheap.
- Getting forms dead level is probably the most tedious part, but nothing beats the payoff. Curious if anyone’s tried those adjustable form brackets—worth it, or just another gadget?


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Posts: 17
(@bnebula83)
Active Member
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MY ADVENTURE WITH DIY CONCRETE FOUNDATIONS

- Used those adjustable form brackets once on a small retaining wall—honestly, they helped a bit with speed but didn’t make things magically perfect. Still had to shim and fiddle. Probably more useful if you’re solo or doing odd shapes.
- Vapor barrier... can’t agree more. I’ve seen floors buckle from trapped moisture. Not worth skipping, ever.
- For fiber mesh, I still lean toward rebar for anything structural. Maybe overkill sometimes, but I sleep better.


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