@onsitearchitect: Stop making this huge roofing mistake! Screwing metal flashing directly to a flat wall will always let rainwater sneak right behind it and cause expensive damage. The professional trick is cutting a thin groove into the wall, tucking the bent edge inside, and sealing it up tight. Save this post before your next home repair project! #roofinglife #constructionhacks #diyhome #waterproofing #contractortips