How much does a roof cost to replace, line by line?

The line items

1. Tear-off and disposal. Removing old shingles down to the deck and hauling them away. More layers mean more labor and dumpster weight.
2. Decking repair. Replacing rotted, delaminated or soft sheathing, usually at a per-sheet price you should see in writing before work starts.
3. Drip edge. Metal at eaves and rakes, required by the residential code for shingle roofs.
4. Underlayment. Synthetic or felt over the whole deck.
5. Ice and water barrier. Self-adhered membrane in valleys, around chimneys and walls, and at eaves where required.
6. Starter strip. The first course at eaves and rakes that seals the edge.
7. Shingles. The named product line and color.
8. Hip and ridge cap. Specialty pieces for ridges and hips.
9. Flashing. Step and counterflashing at walls and chimneys, valley metal where used.
10. Pipe boots and vents. New boots for plumbing stacks and replaced exhaust vents.
11. Ventilation. Ridge vent, intake vents or attic fans as needed.
12. Labor surcharges. Steep pitch and two-story height.
13. Permit and cleanup. Fees vary by Georgia jurisdiction; magnetic sweep for nails.

The items that vary most

Decking, layers, pitch and flashing complexity. Two quotes with the same shingle can differ by thousands because one plans for chimney counterflashing and new ridge vent and the other reuses old metal.

Reading quotes side by side

Line them up item by item. Anything missing is either included without being stated, or will become an extra later; ask which. See roof replacement cost in Georgia and what to expect on roof replacement day. Robust Roofing walks through each line in its estimate reading guide.