Ice Dams on Flat Roof
I have a flat roof with rolled roofing over an unheated and uninsulated sun room. Enough heat leaks into the sun room from the house that the snow melts and forms really bad ice dams. Those dams back up water all the way to the gable roof and caused some leaking last year.
I've considered a few options to help with the issue.
1) Roof cables - my problem here is that they normally attach to shingles. I don't know of any way to attach them with a rolled room. Does anyone have any ideas?
2) Add insulation to the ceiling. There is no attic, but there is about a 6-9" cavity in the ceiling. I guess I could cut holes and blow insulation.
3) Shoveling snow off the roof. This is a pain, but may be my only option.
Does anyone have any other ideas?