Protruding Roofing Nails

3 degree electro galvanized steel roofing nails 5 lb pack for applying roofing asphalt shingles insulation board and felt to wood substrates.

Protruding roofing nails.

One inch roofing nail the other way to determine if the proper nails were used is to look in the attic. For example galvanized by various processes aluminium copper or stainless steel. If you use your attic for storage and need protection buy an insulating foam and have it sprayed against the walls. The photo below shows proper 1 1 4 nails sticking through the roof sheathing on the attic side.

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. 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. Use the grip rite 11 x 1 1 4 in. Or there is spray foam insulation to consider if that works with your other insulation and vapor barrier situation.

The protruding nails will help hold it in place there are also adhesives for foam that come in std. All nails must be corrosion resistant. If the roof has 1 2 sheathing you should be able to see the nails sticking through in to the attic. 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.

Unless you live in your attic the protruding nail heads shouldn t be a problem. A large nail head and heavier shank gauge provide greater holding power. 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. Hammer a new nail into the roof about 1 inch above the hole from the previous nail.

Protruding nails can actually be a good thing. Of the cutting methods the cut off wheel sounds the best to me. Proper nail visible in attic.