Should I insulate above a suspended ceiling or in the attic

insulation

In our old house the drywall on the kitchen ceiling has to be replaced due to water damage. Original walls are 10' tall. Previous owners dropped the ceiling two feet to hide wires, plumbing, etc. At this time there is no insulation in the attic. Plans are to have some blown in soon. My question is should I insulate between the ceiling joists which is 2 feet below the attic floor or will the insulation blown into the attic suffice ?

Best Answer

It's not common to see insulation below a hard ceiling (immediately above a suspended ceiling--even if it's drywall). That space is considered "conditioned".

However, if your dropped ceiling is in effect a hard ceiling, it may make sense to insulate at that level. To do so reduces the conditioned space volume and would be more efficient.

It's going to depend on access and the structure around that room, as well as wall insulation and HVAC configuration.

In response to your comment, it wouldn't be a problem to insulate the lower ceiling as long as you have a continuous blanket through to the ceiling in adjacent rooms.