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Cold room floor help (slrpnk.net)

submitted 3 days ago by TheJesusaurus@sh.itjust.works to c/diy@slrpnk.net

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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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[–] TheJesusaurus@sh.itjust.works 8 points 3 days ago* (last edited 3 days ago) (1 children)

Basement yep. The rest of the basement subfloor is poured concrete. Other than this cold room the basement design seems to be very typical poured concrete foundation dug under grade, typical of eastern Canada.

[–] semisimian@startrek.website 9 points 3 days ago (2 children)

https://www.owenscorning.com/en-us/insulation/commercial/enclosure/below-grade-under-slab-foamular-xps-insulation

I'd remove the existing wood, grade the soil flat and compact it. I'd then put down 2 in foam board (like in the link above) to decouple the flooring from the Earth. I would pour concrete to match the subfloor in the rest of the basement, but you don't have to. You can go back with a pressure treated subfloor product on top of the foam, etc.

A few things to keep in mind would be making sure that you get the right height of the soil so that you have the finished flooring height you desire. Also, all this work assumes you are maintaining access to that clean out. Good luck.

[–] TheJesusaurus@sh.itjust.works 3 points 3 days ago

Thanks for this! Whatever happens I'm fairly certain I'll need this eventually

[–] classic@fedia.io 2 points 3 days ago (1 children)

Random reader here. What's a clean out?

[–] TheJesusaurus@sh.itjust.works 4 points 3 days ago (1 children)

He's referring to the capped pipe in the centre of the room. I'm not entirely certain either

[–] schwim@piefed.zip 3 points 3 days ago (1 children)

It's a septic or sewer clean out. Code requires them at certain distances of the drain system to allow for access to clear any blockages. You can use that access to run a snake.

[–] CompactFlax@discuss.tchncs.de 3 points 3 days ago (1 children)

It’ll save your ass from a big bill if your kids flush something they shouldn’t vs calling a plumber.

[–] TheJesusaurus@sh.itjust.works 2 points 3 days ago (1 children)

That's very good to know

[–] CompactFlax@discuss.tchncs.de 1 points 3 days ago (1 children)

Just be careful opening it. If there’s a blockage downstream of this clean out, you’ll see symptoms of the blockage somewhere else, and the pipe will therefore be full from the blockage right to the symptomatic drain. Hopefully it’s a floor drain, but it could be a lot of water with some possible pressure behind it so really think the situation through before cracking it open, and have a plan.

[–] TheJesusaurus@sh.itjust.works 1 points 3 days ago

That's very good advice