In addition to installing the foam board on the underside of the roof deck you can attach it to the bottom edges of the rafters in the same manner you would hang drywall.
Insulating underside of roof.
In some cases you won t be able to insulate the underside of the roof itself but rather the attic floor.
It will help you to eliminate problems that may come when the house becomes extremely cold in the winter and terribly hot in the summer.
Polyurethane spray foam metal roof insulation in order to add moisture barrier under metal roof you can spray the undersides of the roof by using a thick layer of polyurethane spray foam.
It can trap moisture around the timber stops tiles or slates being reused in the future and prevents inspection of the underside of the roof.
Insulating the underside of roofs making the case for the unvented attic assembly background.
This is also a great way to ensure that your attic is insulated from the punishing summer and winter weather.
Advantages of unvented attic assemblies.
An unvented attic differs from a conventional vented attic in that there is no direct venting of the attic.
Insulating a sloping roof 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.
Don t use the wrong materials.
Don t use spray foam insulation on the underside of roofs.