I've used stainless steel screws on a couple residential decks, and honestly, I'm still on the fence about whether they're worth the extra cash. A few...

Been there myself... honestly, some of the best subs I've worked with had pretty meh online ratings. If the face-to-face feels right, references check...

Had a similar situation myself last spring—metal roofing panels started vibrating like crazy during a storm. A few quick thoughts from that experience...