There is a nifty little lever shovel type thingy that catches on the roofing nails and pulls them back up through the.
Roofing nails protruding.
Most protruding 3 or so into the crawlspace.
Or there is spray foam insulation to consider if that works with your other insulation and vapor barrier situation.
Hammer a new nail into the roof about 1 inch above the hole from the previous nail.
A large nail head and heavier shank gauge provide greater holding power.
Of the cutting methods the cut off wheel sounds the best to me.
Roofing contractors have told me electro galvanized nails that stick out past the sheathing edge can attract water which can prevent the wood deck from absorbing the moisture and rotting.
A roofing nail should have a minimum nominal shank diameter of 12 gauge 2 67 mm and a minimum head diameter of 9 5 mm.
Protruding nails can actually be a good thing.
Roofing nail should have a barbed shank until the head which eliminates nail pops blow offs and roof leaks.
All nails must be corrosion resistant.
3 degree electro galvanized steel roofing nails 5 lb pack for applying roofing asphalt shingles insulation board and felt to wood substrates.
3 use the grip rite 11 x 1 1 4 in.
If you have a friend in the attic ask him to direct you to a sturdy spot where the nail can bite into the wood.
The protruding nails will help hold it in place there are also adhesives for foam that come in std.
Use the grip rite 11 x 1 1 4 in.