Hey experts, I hope you can help me. I plan to install a subfloor in my unfinished basement by laying down 1" polystyrene sheets directly onto the concrete floor and then covering them up with 5/8" OSB fastened down with Tapcon concrete screws.
Here's where I'm not thinking clearly. I plan to enclose my utilities (i.e. furnace, hot water tank) by building a room around them with partition walls. Do I build the partition walls first and then build the subfloor up to the partition wall? Or do I build the subfloor first and then build the partition wall on top of it? If I did that I'd have to somehow continue the subfloor under my furnace...I don't see that happening.
If I build the subfloor up to the partition wall, I would then have exposed concrete floor in my utilities room. Any issues with moisture developing on the concrete floor in the utility room since heat from the surrounding rooms could penetrate the wall and condense on the cold concrete floor?