Never scrimp on the nails!
I think you wrote the book on nails per shingle!do you use per shingle? I have worked for people who want only 4 and some who demanded 5. My personal standard is 5, however I don't hold it against anyone who only uses 4. and I 6 nail anything on a 12/12 or higher.
with 3 tabs I only 4 nail to avoid this, except on a steep slope I'd 6 nail them 1 at each end and 1 on either side of each key-way, with dimensional shingles, It's a matter of how far you step them. and 6 nails is what Certainteed calls for on steep slope application.isnt there actually a nailing pattern
too many nails can put you closer to ''key way'' than you should be no?
I agree, I put 5 on the line every time.Nail placement is more important than how many.