Should you insulate rafters?

The attic should beventilated and the rafter insulation should be between two unheated spaces. It's possible to add insulation to the floor. Make sure the attic is well-ventilated. Ice dams are prevented by cold roofs.Insulation between beams will not do any good, because the attic must be ventilated, and the insulation of beams would be between two unheated spaces. Insulation can be added to the ground the better. Also, make sure that the attic is well ventilated. Cold roofs avoid ice prey.