Transfer as much as the next shingle row, offsetting the shingles horizontally by about six inches so the tabs are staggered. Each and every 3-tab shingle needs four nails, 1 above Each individual tab groove. The nails should be inserted 3 to 4 inches in the shingle’s bottom edge, plus https://trentonrahmr.mywikiparty.com/877315/what_does_roof_mean