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this post was submitted on 17 Nov 2023
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Hmm, it would seem to me that pools that break when empty should be rather rare as that that is not a sound construction in general. Maybe in costal areas with raising groundwater table due to sea-level rise it might happen though.
Edit: the lifting issue is somewhat common with underground cisterns and septic tanks though, which are typically expected to be always filled with water.
If the pool has a deeper section it could be used as a pond that acts as additional thermal buffer and a sump pump with float switch could make sure the pool doesn't get flooded during heavy rainfall.
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
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.
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.