copper roofing valleys. here is a close up of the flashing the roofer should have put in a cricket in here to divert the water. roof valley metal being replaced with copper . flashing metal masonry copper valley detail on a house . metal over asphalt roof. 2012110295152226- roof gone bad! round dormers, anyone have experience with them?-2012123195133926. metal roof vent flashing 70 with metal roof vent flashing .