What moves the price the most
Tear-off or recover. This is the biggest swing. If the old roof and insulation are dry and sound, a new roof can often go over the top. If the old roof must come off, you pay for removal, disposal and new insulation. That can more than double the cost per square.
Wet insulation. Wet insulation has to come out, whether you repair, coat or replace. A moisture scan before the estimate tells you how much. Without one, the price can change once the roof is opened up.
Insulation thickness. Code sets how much insulation a new roof needs. Roof Observations notes that much of the South calls for about R-25 above the deck. Adding insulation to meet code is a big part of the price on a tear-off.
Roof size and shape. Big, simple roofs cost less per square than small roofs with lots of corners, walls and units.
Rooftop units, pipes and drains. Every unit, curb, pipe and drain needs flashing. More of them means more labor.
Access. A one-story warehouse with an easy ladder is cheaper to work on than a five-story office that needs a crane.
Wind rules. Florida roof systems must meet tested wind-uplift ratings, with more fasteners or adhesive at edges and corners. That adds cost compared with some other states, and it is worth paying for in Tampa.
Code and permits. Florida's 25 percent rule can affect large repairs on older roofs. Roofs built to the 2007 Florida Building Code or later only need the repaired part to meet current code.