We’ve install UDL30 underlayment on the roof using a Stinger Pnumtic cap nailer.

There are drips in a few spots in the building on heavy rain days. I think it’s coming through some of the caps. There are a few cracked caps. Should I go through the roof and remove any cracked caps and replace them? This would be very labor intensive as it’s a 38 square roof. Or will there be no issue once metal is installed. We still haven’t decided if we’re doing exposed fastener or not, but it will be metal panels.