Move up to the subsequent shingle row, offsetting the shingles horizontally by about six inches so which the tabs are staggered. Every single 3-tab shingle involves 4 nails, a person higher than Every single tab groove. The nails really should be inserted three to four inches through the shingle’s base https://roofing-experts71470.worldblogged.com/32457029/the-smart-trick-of-roof-that-no-one-is-discussing