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Cold room floor help (thelemmy.club)

Hey, I've got a cold room in my place that is concrete on all sides, I'm going to be framing it in and insulating and I don't really need any help there unless there's anything cold room specific I should know, however.

As you can see I have a floor that appears to be a stepped concrete pit, filled with quite a lot of dirt, and what I believe is probably a tie in to the sewage drain.

Can I just get rid of the dirt? The whole room spells like petrichor because of it.

Assuming the pit continues to step down, can I just build the floor over it regardless, and do I need to support the pipe in some way if the dirt is removed?

Or, if I'm completely off base please let me know what I should be doing.

Thanks

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[-] waterSticksToMyBalls@lemmy.world 9 points 5 months ago

I would dig it down a bit, put in some fresh gravel base and put foam panels over the top. Install a subfloor directly over the foam and flooring on that, with an access panel for the clean out.

[-] TheJesusaurus@sh.itjust.works 5 points 5 months ago

As in backfill with gravel. Level it, and start building the subfloor right off the gravel? (On top of the foam board. Which would be floating then?)

[-] waterSticksToMyBalls@lemmy.world 4 points 5 months ago

Yeah basically this but where the concrete slab is shown, install whatever flooring system you want. All though I will say a concrete slab will last the longest.

this post was submitted on 14 Nov 2025
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