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Perfect Nailing

atlas-roofin-perfect-nailing
June 1, 2017 at 4:46 a.m.

Proper nailing is essential to the performance of asphalt shingles.

By Atlas Roofing

Accurate nailing affects the performance of roofing shingles and it’s also required by the International Building Code.  A recent post on Atlas’ Asphalt Life blog provides guidance on achieving the perfect nailing on an installation.

Atlas has installation guidelines to ensure proper nailing and uniform installation of its shingles. They include:

  • Minimum, normal shank diameter of 11- or 12-gauge with a minimum 3/8“ head diameter
  • Nail length must be a minimum 1 ¼” long; when covering over a roof a length of 2” is recommended
  • Florida Roofing and Sheet Metal Contractors Association recommends WH Maze electrogalvanized roofing nails which are more resistant to corrosion
  • Nails should penetrate ¾” into the roof deck

It’s important to drive nails by hand or with a properly adjusted nail gun. If the nail gun is not adjusted correctly it can lead to over- or under-driven nails resulting in corrosion, buckling, and risk of blow-offs. If a nail is incorrectly driven, it should be immediately corrected. Fixing and under-driven nail can be done by simply tapping it down to the correct depth. In the case of crooked or over-driven nails, the nail must be remove and the hole repaired with roof cement. A new nail should be driven in a spot nearby, but not in the same hole. If repair is not possible, replace the entire shingle.

Nail placement should never be closer than once inch from the edge of a shingle and the nails should never be in a place where they will be visible or exposed to weather. Proper placement ensures maximum performance on each roof.

Learn more about proper nailing and placement at Atlas Roofing.



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