Use the range to plan—not to pretend the roof was inspected.
Tile lift and re-lay should not be priced as if it were a complete new-tile installation. Low-slope systems and metal options also need their own categories. AZ Roof Estimator keeps those systems separate so the initial range and later bid comparison do not blend unlike projects.
Aerial measurements are approximate. Decking damage, permits, flashing, ventilation, material upgrades, solar handling, rooftop equipment, access, and final measurements can move a contractor’s price.