If this is what happened then you may have a problem unrelated to the quality of the roofing job.
Nails too long for roof.
The number of nails needed for a roof varies on multiple factors such as board face width length and roof truss spacing.
If you do glue the wood with construction adhesive.
Theyre only too long if you dont like them.
You can just paint over them and live with the result or fill in the areas with wood covering the tips.
So if i assume 1 2 osb sheathing i should be able to cut the nails off with 1 4 still sticking through the sheathing into the attic.
Boards used for sheathing range from those with a 4 inch face to 48 inch long plywood sheets.
Why would you inset your head between the rafters anyways.
A structure s roof truss spacing can vary from every 12 to 24 inches.
Each of these factors plays a role in determining how many nails you ll need to use per board during roof sheathing application.
I have giant nails in our roof too but i ve just opted to ignore them.
Don t use nails or you will poke through the roof.
The more common roof thickness is 3 4 inch decking.
It s that the roof sheathing is not thick enough for the nails.
Fasteners for asphalt shingles shall be galvanized steel stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 2 67 mm shank with a minimum 3 8 inch 9 5 mm diameter head astm f 1667 of a length to penetrate through the roofing materials and a minimum of 3 4 inch 19 1.
Standard roofing nails should not be long or thick enough to split or crack structurally sound dimensional lumber.
Your home is over 50 years old in a warm wet climate so you should inspect for a number of different problems.
It has to be this way be careful.
As far as dangerous the old nails were also through the roof deck i am sure.
When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails.
Looking at a 2005 tile roof installation manual it looks like the minimum penetration of a roofing nail into roof sheathing was 3 4.
I d say who the hell uses 3 nails on a roof but then the previous owners used 16d nails as hangars everywhere.