If you make a mistake and nail 6 per shingle instead of 4 you ll have wasted time money and effort.
Roof shingle nail placement.
To ensure optimal performance of your asphalt roofing shingles be sure to follow these general directions for proper nailing.
Nails of the proper length should penetrate three fourths of an inch into the roof deck.
Roofing experts know there are specific numbers of nails for each type of shingles.
Fasten shingles with corrosion resistant nails.
Use the correct roofing nail material size and grade as specified in the shingle installation instructions.
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The length of each nail must be a minimum of 1 inches long and for roof overs atlas recommends a nail length of at least 2 inches.
Shingles with sealant on the back surface.
This chapter will demonstrate how to properly nail.
For most shingles with sealant on the top surface place nails below the sealant strip but above the area that will be.
Critical aspects of nail placement include.
Never place nails where they will be fully or partially visible after the roof is complete.
However where the roof deck is less than three fourths of an inch thick the nail should be long enough to penetrate fully and extend at least one eighth of an inch through the roof deck.
To avoid all this pay careful attention to the manufacturer specs.