The rationale behind the number is that in most cases four nails are the right number of nails to do a quality job.
How many nails in each roof shingle.
For all owens corning shingles roofing nails should penetrate into the wood deck by a minimum of inch or completely through the roof deck by a minimum of 1 8 inch.
Place nails in the three tab shingles about 3 4 inch 1 8 centimeters above the cutouts near where the tab meets the upper part of the shingle.
Standard roof installation requires four nails per shingle.
In high wind areas you need five nails per shingle or 480 nails per square.
320 nails will be needed to install a square of standard 3 tab shingles assuming four nails per shingle and 80 shingles per square.
When nailing shingles proper penetration into the roof deck is essential to ensure the nail and shingle remain secure.
This adds up to an average of 320 nails or 100 square feet.
Also place a nail 2 inches from each end of the shingle in line with the other two.
When reshingling a roof shingle nails need to be placed appropriately in order to keep elements out and the shingles on.
However make sure that you do not nail into the tar strip.
The average 3 tab shingle needs four nails per shingle.
Roofing nails per square most shingle manufactures recommend using four nails per shingle on the main area of your roof and five nails per square in the first row of roofing.
In all use four nails per 3 tab shingle.