seems odd to me to put a subfloor in a basement, as I would think tile on the slab would allow you to keep the drains and the angles toward them. BUT, I'm sure there are circumstances where it makes sense. Not gonna ask for the blueprints to your basement to analyze 😅
@robbie@tyler@Dan_Hulson without a subfloor the concrete is freezing, the other option would be to carpet it which was disgusting when I pulled it up. I laid down a vapor barrier for the weeping tiles and laid the subfloor on top of that, shimmed etc
i dont think ive ever seen a basement that doesn't have a subfloor with vinyl flooring. there's no fucking way that would work here and any other place I've laid flooring tbh