What does a roof replacement involve?
A full replacement is more than new shingles laid on top of the old ones. A typical job runs in this order.
Tear-off and deck check
The old roofing comes off down to the wood deck. Any rotted or soft boards are marked for replacement. Hidden damage often shows up at this stage, so a good quote explains how decking problems will be priced if they appear.
Underlayment, flashing and ventilation
New underlayment goes down, followed by flashing at chimneys, walls, skylights and valleys, plus vents and ridge components. Most roof leaks start at flashing, so this step deserves as much attention as the shingles.
New roof covering and cleanup
The shingles or metal panels are installed following the manufacturer's instructions. At the end, the crew should sweep the yard, driveway and beds for nails and debris.

