Nails Too Long For Roof

When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails.

Nails too long for roof.

If you do glue the wood with construction adhesive. 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. It s that the roof sheathing is not thick enough for the nails. Don t use nails or you will poke through the roof.

Looking at a 2005 tile roof installation manual it looks like the minimum penetration of a roofing nail into roof sheathing was 3 4. Your home is over 50 years old in a warm wet climate so you should inspect for a number of different problems. 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.

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. I have giant nails in our roof too but i ve just opted to ignore them. Standard roofing nails should not be long or thick enough to split or crack structurally sound dimensional lumber.

I d say who the hell uses 3 nails on a roof but then the previous owners used 16d nails as hangars everywhere. Theyre only too long if you dont like them. Roofing nails should be long enough to penetrate the roofing material and go 19 mm into osb solid wood plywood or non veneer wood decking or through thickness of decking whichever is less. 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.

Each of these factors plays a role in determining how many nails you ll need to use per board during roof sheathing application. As far as dangerous the old nails were also through the roof deck i am sure. It s not that he used too long nails standard sizes. A structure s roof truss spacing can vary from every 12 to 24 inches.

Manufacturer specification and common sense dictate the nails penetrate the roof deck whenver possible.