Big fields of open roofing are easy to cover. The devil is in the details. Flashing, vents and gutters cover such a small area but often take the most labor because they’re put in harm’s way to divert endless streams of water, year after year. The likeliest sources of intrusion don’t get the glamour but definitely get the attention of the roofing industry. There are a number of vendors who have spent careers addressing the challenges of weathering, debris, impacts and neglect that roofing components experience.