Yesterday, while inspecting a $299.000 & NO SENSE. home, I ran across an attempted sheetrock repair and some water stains that were located directly under a second floor bathroom. The buyer's rep was there and she said, the seller said the stains were from an ice damming problem that had been repaired by a roofer. When I pointed out the fact there was a bathroom above and there were no stains or evidence of any type of repair, her eyebrow went up, also. A while later, the listing agent / next door neighbor showed up and tried to show me where the repairs were made to the roof. (Must have been magic) I took him around back showed him the proximity of the bath over the damaged first floor ceiling and he began to get angrified, and again stated that a roofer had fixed it. Beautiful. So, there should be no problem producing documentation supporting the repairs. Here's the Q. Other than tearing the roof off and starting over, exactly what kind of repairs can be made to the roof cover to prevent a problem with ice damming?