Tear-Off vs. Overlay: Why the Starting Surface Matters
Understand why removing old roofing often gives contractors a clearer view of decking, ventilation, and flashing conditions.
The starting surface affects the finished roof. A full tear-off exposes the decking, makes hidden damage easier to find, and gives installers a cleaner base for underlayment and shingles.
Overlay can hide problems
Installing over old roofing may seem simpler, but it can leave soft decking, trapped moisture, old flashing issues, and uneven surfaces undiscovered.
Tear-off supports a cleaner system
When the old material is removed, the crew can inspect sheathing, replace compromised areas, install fresh underlayment, and address transitions more deliberately.
What to ask your contractor
- How many existing layers are on the roof?
- Will decking be inspected after tear-off?
- How are bad sheathing sections priced and approved?
- Are flashing and ventilation being replaced or reused?
Ready to talk through your roof?
Start with the roofing page, calculator, or a field-confirmed estimate.