Exposed Fastener Roofs in Ice Damming Environments

Guest User
In climates subject to ice damming, what are the restraints on exposed fastener roofs? How long can they be and at how low a slope? What should be considered in trying to seal the laps? How long will the sealants between laps perform under yearly severe weather? What types of maintenance would you recommend to this style of roof to prevent leakage from expansion and contraction and ice damming around the laps?
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