this post was submitted on 17 Nov 2023
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I'm thinking about my next photobash. I've seen photos of projects turning old, likely nonfunctional swimming pools into walipinis, but conventional wisdom has that there's a big difference between an empty concrete swimming pool and a proper foundation. That the sides will collapse without the support of the pool water, or the water table in the ground will lift the thing like a concrete boat and break it. Just the same, it's not uncommon to see abandoned swimming pools laying empty, looking more or less foundation-shaped. It seems like a very solarpunk thing, to turn an expensive-to-maintain luxury into something practical, a greenhouse that takes less energy to keep it warm.

So my question is: can it be done, especially if the pool is already nonfunctional and you're not worried about returning it to its original use? What steps/precautions should you take to make it last and safe? Reinforce the sides? Cut away part of the bottom? Add drainage around it?

Thanks for any thoughts

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[–] JacobCoffinWrites 3 points 1 year ago (2 children)

Yeah I kind of wonder if a lot of the stuff about them breaking when left empty is that they won't be suitable as a swimming pool anymore, rather than that they become a death trap. And if you don't value the idea of a swimming pool, or it's already so broken it would need expensive overhauls or replacement, then a walipini with a cracked foundation isn't really a big deal.

But it comes up in every discussion I've found about empty pools, so I'd want to identify any precautions or mitigations to include before I start the sketch

[–] poVoq 4 points 1 year ago* (last edited 1 year ago)

Hmm, I am not really an expert on the topic to be honest and here in Europe private pools tend to be only build in southern Europe in places which I guess rarely have high groundwater tables. But I can imagine it being more of an issue in Florida for example.

[–] Num10ck@lemmy.world 2 points 7 months ago

as i understand it, if you leave a pool empty too long it will need to be resurfaced. in the 1980s recessions empty swimming pools were commonly used as skateboard ramps. they dont structurally collapse, but their surfaces flake away.