After a re-roofing job there are hundreds of nail points sticking out in the attic. I use some of the attic space for storage so when standing up in there I get poked in the head, but also in freezing weather, these nails drip from condensation and get all my stuff wet. Can I cut off the nails and then put a dollop of silicone sealant on the little bit still sticking inside to insulate the nail from the warmer moister air in the attic so it won't drip? Or would that cause the moisture to soak up into the sheathing and lead to rot?
Roofing ails are supposed to protrude, at least a bit. That's how they achieve much of their pullout resistance. It's a bit odd that they didn't before.
Feel free to stick whatever you like on them to protect your head. If they're dripping that much, though, you're sorely lacking in attic ventilation. Protecting the nails doesn't do anything for the wood throughout the attic.