2d extend insulation into joist space to reduce air flows.
Insulation above ceiling tiles.
Adding insulation to a dropped ceiling is a straightforward process but because the ceiling grid is somewhat hampering use 4 foot insulation batts instead of longer rolled batting.
In finished attic rooms with or without dormer insulate 2a between the studs of knee walls 2b between the studs and rafters of exterior walls and roof 2c and ceilings with cold spaces above.
If you have fiberglass tiles you ll need to replace them before proceeding.
Fiberglass ceiling tiles cannot support the weight of insulation.
Ensure that your ceiling tiles can support the weight of the insulation.
Soniguard drop ceiling soundproofing insulation above your ceiling tiles will dramatically improve the sound blocking characteristics of any suspended ceiling.
Although batt insulation is fairly lightweight it can put an undue amount of stress on flimsy drop ceiling tiles and break them.