Forum Title: Ice shield on entire house?
I was just wanting to run something by you guys. I have a church that had some serious ice dam issues this year. This is just a simple roof 40 feet wide by 40 feet up on each side, it is about a 3 1/2 to 4 in 12, it is plywood decking. When I tore this roof off several years ago, I could look down in some of the roof vent holes and see another roof down below several feet. It appears when they did the addition many years ago they just planted new roof structure over old roof without removing. This year they had ice leaks on this roof. I went over and the entire roof was ice, now granted we had 3-4? of freezing rain. But when the melting started, water backed up under black paper and leaked in. I had used ice shield along edges but it backed up even higher than that and went up to second seam in decking, about 8?. The church now had me price removing entire roof and felt, installing Grace Ice shield on entire roof, then installing new shingles. My question is?Have any of you done this? What are pros and cons? We Don't get ice that often but this year was terrible. Now everyone is worried about ice dams so I need to find a reasonable way to install a roof that is 100% ice dam proof. Talk to me northern climate guys. Thanks!
Category: Roofing Post By: ROSE REED (Knoxville, TN), 03/07/2018

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