How ceiling insulation works Ceiling insulation is designed to reduce the transfer of heat through the ceiling. Heat naturally flows from warm to cool areas, particularly through ceilings. During the ...

Easier to install than drywall, a suspended ceiling allows simple access to overhead mechanical systems. It's comprised of a grid that supports 2 x 4- or 2 x 2-ft. panels.

If you try to use quarter-inch drywall on the ceiling, it will droop between the ceiling joists, which are normally set 16 to 24 inches apart.