Good points about water traveling under metal roofs—seen that myself a few times. Thermal imaging can definitely help, especially if there's insulatio...

True about the rolling issue, but carpenter pencils smudge easily on damp shingles. I've switched to lumber crayons—weather-resistant, visible lines, ...

Totally feel your pain—tarps can be a nightmare, especially in windy areas. A few quick thoughts from someone who's been there: - First off, you're n...