If you can’t see any telltale movement marks, search for ‘shiners’ poking from the underside with the roof. A shiner is really a nail that missed the framing member when the roofer nailed down the roof decking. Replace large areas of failing flashing, if important. Pry off stretches of unsound https://roofing-contractors06035.blog4youth.com/34507334/a-review-of-roof-replacement