Transfer as much as the next shingle row, offsetting the shingles horizontally by about 6 inches so the tabs are staggered. Each individual three-tab shingle calls for four nails, 1 earlier mentioned each tab groove. The nails should be inserted three to 4 inches in the shingle’s bottom edge, along https://pure76420.buscawiki.com/877043/considerations_to_know_about_roofing