hello everbody, i had new copperflashing installed above my wraparound porchroof. now the carpenters started installing factoryprimed smooth cedarshakes on the walls. is it okay if the bottom of the first row of shakes touches the copperflashing or should there be a space for aircirculation so the shingles can dry better after a good rain. i checked all my fhb magazines but i couldn’t find anything. thanks for your help.
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There should be a gap (~1/4") between the butt of the shakes and the roofing below. Are you asking about the backside of the shakes where they lay against the wall? If so, I'd fasten them snug to the wall, but that's me.
That gap should be in the neighborhood of 1". The bottom edge of the shingles should definitely not touch the flashing.
One more thing, checkk out the cedar shake and shingle bureau for wall installation guidelines.