My understanding is that after 2008 all roof decks had to be re-nailed when a new roof is installed. Before 2008 some homes already had 8D nails with correct spacing and some did not. Some homes being built after 2002 the builders started to use the new nailing and some AHJ required new nailing on new builds. I understand that the HVHZ is different, I am asking about everywhere else in the state. Reason is this…I have come across in the past where a roof over was accepted when the roof deck had been already re-nailed from a previous re-roof, but what about a 2011 roof over permit where the roof deck is still stapled. I have asked a couple of roofers and most of them just say not sure, they re-nail everything and do not worry about it. They do not do roof overs.
Thanks in advance for your feedback.