Transfer as many as the following shingle row, offsetting the shingles horizontally by about 6 inches so the tabs are staggered. Every single 3-tab shingle involves 4 nails, just one higher than Every single tab groove. The nails must be inserted 3 to 4 inches in the shingle’s base edge, https://excellentopolis.com/roofing-hail-navigating-insurance-claims-for-a-hassle-free-experience/