If your attic is going to be converted into livable space then you will need to insulate the roof rafters.
Insulating attic ceiling rafters.
Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.
Insulating a ceiling is affordable cellulose or wood fiber insulation is made from used newsprint other paper feedstock or wood.
For rolled insulation place it between roof rafters.
Chemicals are then added to the insulation in order to provide fire resistance.
Fiberglass insulation is made from glass that has been heated and drawn out to form workable fibers.
Hire a pro to install spray foam insulation.
Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming which results from the warm air trying to escape through the apex of the roof but instead heating up the snow.
Garages built without attics are also prime candidates for insulation.
In these designs take out attic.
If you have a solid floor covering the roof rafters use the claw end of a hammer to pull the floor up in several locations and blow the insulation under the boards.
You can use rigid foam panels or do as tom silva does with nearly all houses these days.
If you re considering turning your attic into conditioned storage or living space it s worth changing tactics to insulate between the rafters and wall joists instead of the floor.
Apply insulation between rafters when finishing an attic into a heated room or when building a cathedral ceiling in the home.