I have a 50's era cape cod house with a raised roof facing south with a soffit. I recentley had my roof redone last summer with a cobra ridge vent, and have icycles forming on my leaf guard gutters. I think my soffit in the back of the house in plugged with blown isulation. Should I try to remove some insulation from the soffit in the back in the spring. I can get to the soffit from the outside or in the attic. Also I have no soffits in front of my house. Should I insulate my knee walls infront of my house facing north? I have access to the knee wall in the center of the house because there is a crawl storage space between the two closets. The other two have bookcase in them.
You do need to assure an air space for ventilation above the wall cavity at the roof sheathing plane. Clear this area from above, but the soffits should not be insulated. Knee walls should be insulated. Be sure to leave this same air space above the insulation. Also you need to seal the floor joists space below the knee wall.