My attic has loose fill insulation between the rafters and R30 fiberglass insulation covering the entire attic floor. The attic is hot in the summer and cold in the winter. There isnt any insulation on the roof part of the attic and theres a vent on the front of the house right at the peak of the roof, I dont think there is any more venting in the roof. Do I need to add more ventilation like a ridge vent? Im guessing I need to insulate the roof part to.