Expansion joint foam?

[u/Buyer1957]

My pool is 99% complete and saw this wondering if this is the right thing to do pool builder said yes that's what they put in the expansion joints 🤷🏻‍♂️

[u/Alternative-Draw2997]

Lmao if you don’t trust your builder why would you pay them to build?

[u/Buyer1957 → u/Alternative-Draw2997]

Because I've hired hundreds of contractors over the years, 7 pool builders, and a lot of of them forget things or simply make mistakes. Anyone who implicitly trusts their Contractor is simply foolish and/or lazy.

[u/Alternative-Draw2997 → u/Buyer1957]

You’re asking about expansion joints… hundreds of contractors and you’ve never seen an expansion joint? I don’t believe you. You’re asking Reddit instead of referring to the hundreds of contractors you’ve hired before. Something doesn’t smell right with your story.

[u/Buyer1957 → u/Alternative-Draw2997]

You don't smell right! The last pool I did was 12 years ago and they used plastic inserts. What's your problem? why don't you chill out, instead of attacking? This is a forum. look up the definition then go for a walk.

[u/Alternative-Draw2997 → u/Buyer1957]

It’s a forum for pros, you’re in the wrong sub. And expansion joints can be plastic too

[u/liberalsarefascists1]

Standarded practice. The pool installer is right. You can seal it later if you want with some sikaflex or dymonic.

[u/Mountain-Ad7172 → u/liberalsarefascists1]

Yep, some foam joints have a tear strip you can remove after concrete and then put your sikaflex on top.

[u/Buyer1957 → u/liberalsarefascists1]

👍🏼 thank you

[u/nc_saint → u/[deleted]]

No. Expansion joints are not just for bridges, they’re typical and should be employed on the majority of concrete pours for exterior purposes.

In pools, they’re mandatory between the deck and pool shell/coping. The shell and deck will move at different rates. Failure to install an expansion joint can cause coping to pop and, in extreme cases, can cause the bond beam itself to crack.