More insulation /ice dam questions .
I have a 2 story brick home in zone 5. The upstairs has insulation in both the lower floor attic ceilings .The upstairs runs the length , from gable end to gable end.The ceiling and walls ( sloping )are insulated . The attic roof itself is not. The attic ceiling has r 36 pink blown in insulation on both sides of the living space upstairs.Should the roof also be insulated?My heating bills are not bad.The ice daming is my biggest concern.
Also is a fan near a gable end vent of any benefit.Please no spam just help from experienced homeowners or contractors Thanks Johnny