I use to get the huge long icicles, 2-3 feet, hanging from the roof. I finally saved up enough money to get my roof re-shingled and had the roofer put in additional insulation. I no longer get huge Icicles but not I get a glacier covering the roof anywhere from 2-6 inches thick and just tiny icicles less than 6 inches long. I use a roof rake to remove snow with in 24 hours but the ice is all ready there. what went wrong? Do I need to put in the styro-foam spacers along the roof eves to channel the air flow? This is low pitched roof and it has been leaking into the house.