The materials used to insulate under the roof include batts of mineral or glass wool insulation held in place by battens of wood attached to and across the rafters.
Insulate to roof.
Mineral wool rolls are ubiquitous and cheap meaning a whole roof on a standard home could be insulated to the recommended 270mm with a spend of little more than 200.
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.
An advantage of spray foam is it s quick whereas foam board needs to be cut and measured which can be a chore.
Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.
It s worth insulating the sloping insides of a pitched roof in order to conserve heat if the space is to be used for anything except simple storage.
To insulate the roof itself you either use spray foam or retrofit with it with rigid foam board.
Ceiling insulation refers to any type of insulation installed within the floor nearest to the roof structure of the home.