Rain screen detail on chimney box with brick veneer and flashing detail
Building chimney box on peak of roof for chimney pipe and plumbing vent to exit. Thin brick veneer with a rain screen detail. The lid for the chimney box is elevated 1/2″ for an air gap with 3.5″ down turned legs for weather protection. All good so far, but when I go to install the step flashing on the roof next to the brick and then the cap flashing over that which it’s mortared into the grout line, there is now no more ventilation from the bottom of the rain screen as it has been sealed off with the flashing details.
Is this an issue?
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