Overheard a guy at Home Depot say you gotta use treated lumber for everything indoors

I was grabbing some pine boards for a basement shelf project in Denver last Tuesday and this older dude was telling his friend to use pressure treated for studs in a finished wall. In my experience, that's a bad move since treated lumber can warp and shrink way more than kiln dried stuff inside your house. I get it for ground contact or exterior, but why risk the headaches with moisture content and fasteners for indoor framing? Has anyone else run into this advice and had to set the record straight?

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blair_allen8d ago

Used to be one of those guys who grabbed treated for everything because I figured more chemicals equals more protection. Then I framed a basement bathroom with treated studs about six years ago and watched them twist like a pretzel over the winter. Drywall cracked, doors stuck, whole thing was a nightmare to fix. Kiln dried lumber stays straight and you don't have to deal with the corrosion on screws and plates. Learned that lesson the hard way, so now I leave the green stuff for fence posts and deck boards.