Change in Mansard Slope

Change in Mansard Slope This detail shows the condition where the bottom of the mansard meets another roof. At the lower roof, the standing seams are laid flat 8" from the roof break, folded 3/4" and secured with copper cleats spaced 12" O.C. Copper locking strips of the same weight as the flashing are soldered to the pans between seams at least 6" from the roof break and engage the base flashing in a 3/4" lock. At the upper roof, the upper edge of the base flashing is folded 3/4" and secured with copper cleats spaced 12" O.C. A continuous locking strip is soldered to the base flashing and secures the mansard roof edge.

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