Transfer up to the following shingle row, offsetting the shingles horizontally by about six inches so the tabs are staggered. Every 3-tab shingle necessitates 4 nails, 1 higher than Each and every tab groove. The nails need to be inserted three to 4 inches with the shingle’s bottom edge, and https://roofing72592.bloggazza.com/26500874/roofing-an-overview