Should roofing nails be visible in the attic?

[Jennifer Chun]

Should roofing nails be visible in the attic? I replaced the roof a few months ago and realized the roofing nails stick out in the attic, which was not there before. This might can cause leaking, moisture, and mold. I believe they used the wrong size of the nail. What do you suggest? roof company said it is "standard" Thank you in advance!

[Robert M.]

It’s not ideal, but it’s also not uncommon or a big issue. The shingles overlap and the nails are under another shingle. Regardless of the length, there is a puncture hole.  Personally, I wouldn’t sweat it.