Music Lover
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
I dont know a roofer worth his salt that would use 6 nails per shingle. Not only is that excessive but its also a waste.
I always double the nails on the side of the shingle at the end of the rows...it's $5 of nails and an extra 2 or 3 minutes on the whole job. But there's nothing wrong with using 6 nails for the whole job...nails are cheap, and the extra adhesion, especially for those in high wind areas never hurts.