Our basement is 3/4 finished, and does NOT share HVAC with the upper level. We are finishing an unfinished part of the basement as a "den" / guest room. Our ceilings in the basement are 2/6, 16" on center as you may expect.

I am having trouble finding the right insulation to choose to go between these joists. Admittedly, most of my data is coming from the product listings on Lowe's. I can't find insulation for use in a basement ceiling which is not at least 9.5" thick.

Is it okay to just use insulation intended for 2x6 walls in the ceiling?

Also, I don't see the point of using faced insulation since we will be installing a tongue-and-groove pine ceiling so the insulation will not be free-hanging.

Thanks!

PS: I want the ceiling to be insulated because we will have a completely separate HVAC system for the basement (wood stove + 2-zone mini-split), and also for a sounds barrier.

 

You typically do not insulate between conditioned spaces. So if upstairs is heated and your new room will also be heated then insulation in the ceiling between the two spaces really isn't required unless you want it for sound.

 

Yes, I want it for souns proofing as our bedroom is above.

 

So that is a good approach for sound proofing!

Fiberglass is probably the least effective, rock wool is good and so is soft touch (blue jean material).

I used soft touch in my basement, R19, and it's impressive how well it works!

You sure about that 2x6, that is pretty small for a floor!

 

My mistake, they're 2x8. Looking for 7.5" thick batts...