I have a 1950 single story ranch in NYS. There is no basement and the heat/hot water pipes are in the attic. Most of the attic is insulated in the floor joists, and most of the hot water pipes are insulated with foam collars. I did that myself. But there is older fiberglass insulation in the rafters in the attic. I just had the roof redone, and my roofer said that I should really get rid of the insulation in the rafters. He said the roof wasn't getting any ventilation. There is (and was) a ridge vent, but with the insulation, presumably it isn't doing much. There are long eaves, but no soffit vents either (I could easily put those in). Should I remove the insulation from the rafters? My concern is that the water pipes would have to be 100% insulated (right now they aren't - eg. where there are T-connections, where the pipes are close to an outside wall and are difficult to access in the attic, etc..). I'm worried that the cold water pipes could freeze, and/or the hot water pipes could wind up causing more snow melt and more ice dams. etc.. I do have a 'whole house fan' in the attic which we use every day in the summer, and that does a good job of blowing out the hot air in the summer. What's the right thing to do? Thanks very much for any input.