Hi, Still renovating that old house we bought. The basement is partially finished - there was a drywall ceiling - part of it has been taken down due to a previous water leak. There was insulation (non faced) between the ceiling and upper floor. Before we replace the drywall - do we need to replace the insulation? Is there any reason it would be there other than for sound?
Thanks,
Jackie

I would,just for the fact that there was insulation there before.The cost is very little and the idea of keeping the colder air in the lower levels away from the upper floor is more than desirable.

Only for sound you do not need it

You said the basement is partially finished, so I'm assuming the basement is heated. As long as it is heated you don't need the insulation in the ceiling, but I would make sure you insulate the walls. If you do insulate the ceiling, make sure you don't buy faced batts or a vapor barrier.