Roofing
What Is Included in a Roof Replacement?
By Paragon Exteriors LLC · Updated September 25, 2026
Quick answer: A full roof replacement typically includes tear-off of the old roofing, a deck inspection and repair, leak barrier at the eaves and valleys, underlayment, drip edge, flashing, ventilation, new shingles and ridge cap, cleanup, and a final walkthrough. Items often priced separately include extra decking by the sheet, additional layers of old roofing, chimney or skylight work, a ventilation redesign, gutters, and permits where required.
Standard line items in a roof replacement
GAF's breakdown of a typical replacement lists the materials and labor your proposal should spell out. Expect to see these items:
- Tear-off: removal and disposal of the old roofing down to the deck, including the dumpster.
- Deck inspection and repair: once the deck is exposed, the crew checks for soft or rotted spots and repairs them.
- Leak barrier: a self-adhering membrane at the eaves and valleys, which GAF identifies as vulnerable areas for leaks from ice dams.
- Underlayment: a layer over the rest of the deck that protects the plywood or OSB from moisture.
- Drip edge: a metal strip along the roof edges that directs water into the gutters and protects the fascia.
- Flashing: metal around chimneys, vent pipes, dormers, and walls where the roof meets another surface.
- Ventilation: replacement of the existing vents so the attic keeps moving air.
- Shingles and ridge cap: the new roofing surface, plus the cap shingles at the ridges and hips.
- Cleanup: debris removal and a sweep for nails around the property.
- Walkthrough: a final look at the finished roof with the contractor.
What is often priced separately
Some work cannot be sized until the old roof comes off, and some is optional. These items often appear as separate lines or change orders:
- Extra decking beyond what the proposal allows, usually billed per sheet.
- Additional layers of old roofing that must be stripped.
- Chimney or skylight work.
- A ventilation redesign, such as adding soffit intake or cutting a new ridge vent.
- Gutter repair or replacement.
- Permits where required.
How to read a roof replacement proposal
Ask that every material be listed and quantified, and ask how extra decking is billed before you sign. For budgeting, see our roof replacement cost guide for NJ and compare shingle options in best shingles for the Jersey Shore.
If you are still deciding whether you need a full replacement, read roof repair vs. replacement and how to choose a roofing contractor in NJ.
Related guides
- Roof replacement in New Jersey
- Roof replacement cost in NJ
- Best shingles for the Jersey Shore
- Roof repair vs. replacement
- NJ roofing permits guide
- How long does a roof replacement take?
Sources: GAF, What's Included in a Roof Replacement? A Complete Breakdown (accessed 2026-09-25). Paragon Exteriors summarizes this guidance for New Jersey homeowners; your roof and contract details govern the actual scope and schedule.
