Or there is spray foam insulation to consider if that works with your other insulation and vapor barrier situation.
Roofing nails protruding.
Protruding nails can actually be a good thing.
Of the cutting methods the cut off wheel sounds the best to me.
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.
Our contractor said b c our decking was so thin 3 8 the 1 1 4 nails protruded but its ok b c if he used 3 4 shorter nails it would risk.
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.
3 use the grip rite 11 x 1 1 4 in.
For example galvanized by various processes aluminium copper or stainless steel.
The protruding nails will help hold it in place there are also adhesives for foam that come in std.
Most protruding 3 or so into the crawlspace.
There is a nifty little lever shovel type thingy that catches on the roofing nails and pulls them back up through the.
Use the grip rite 11 x 1 1 4 in.
A large nail head and heavier shank gauge provide greater holding power.
Roofing nail should have a barbed shank until the head which eliminates nail pops blow offs and roof leaks.
We just had a new asphalt shingle roof put on and were concerned because hundreds of the roofing nails used to nail down the shingles are protruding through the overhangs of the eaves.
Hammer a new nail into the roof about 1 inch above the hole from the previous nail.