Why decking becomes a change-order issue
Soft, delaminated or deteriorated sheathing may be partly hidden by the existing roof. The complete condition may not be visible until the covering and underlayment are removed.
Price the unknown before work starts
Ask for a unit price for common sheathing repair or a written allowance that explains the assumed quantity.
| Scope detail | Why it matters |
|---|---|
| Sheathing type/thickness | Material and fastening requirements differ. |
| Unit of pricing | Per sheet, per square foot or allowance? |
| Removal | Is damaged material removal included? |
| Approval | How will added repair be documented? |
Use the dedicated calculator
Open the Roof Decking Replacement Cost Calculator, then carry that allowance into the main roof budget.
Sources and verification
- NRCA — consumer roofing information
- OSHA — roofing safety
- FEMA — Building Science
- HomeCostEngine cost methodology
Planning limit: This page is for budgeting and scope comparison. A site inspection, local code review and written contractor proposal can materially change the final project cost.