They're starting to be required on most Maine homes. I don't know all the details, but it came up recently in a discussion with my builder. I think this link i

They're starting to be required on most Maine homes. I don't know all the details, but it came up recently in a discussion with my builder. I think this link is for commercial, but there's something analogous... https://www.mainelegislature.org/legis/statutes/25/title25sec2463.html https://www.mainelegislature.org/legis/statutes/25/title25se...