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