Roof replacement cost by material swings wildly, so it pays to compare before you commit. Asphalt shingles run $5 to $9 per square foot installed, while metal lands around $12 to $18, and slate or tile can hit $20 or more. Labor, underlayment, and tear-off add up too, so your final quote depends on pitch, size, and location. Get three itemized bids and ask about warranty—paying more upfront often means fewer headaches later. roof replacement cost by material 12