My house is 26 years old. I have been getting ice dams the past 2 years and I noticed a few days ago that I don't have any soffit vents. There are 2 roof vents and two gable vents. One of the gable vents has a fan. I noticed a lot of condensation in the attic so I covered the attic door to prevent heat loss through there. How important are soffit vents? Should I install them?
down the road probably,but usually all that condensation is a result of poor attic insulation (not enough),a bathroom fan dumping moisture into the attic,or possible other issues,you can add ventilation thru fascia replacement,but will involve renovating the fascia area of the roof