Transfer as many as the following shingle row, offsetting the shingles horizontally by about 6 inches so which the tabs are staggered. Each 3-tab shingle necessitates 4 nails, 1 above Every single tab groove. The nails ought to be inserted three to four inches within the shingle’s base edge, as https://roofing93936.blogars.com/26331351/top-guidelines-of-roof