2026 project cost
Repair Roof Decking Cost
$3,747 to $5,292 for 400 sq ft, or about $9.37–$13.23 per sq ft. That covers 5 material line items and about 12 labor hours.
Estimate your repair roof decking project
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Estimated total
$3,747 – $5,292
materials + labor
What the materials cost
Quantities for 400 sq ft, including a 12% waste allowance.
| Material | Qty | Cost |
|---|---|---|
| 10-in x 50-ft Silver Aluminum Roll flashing | 44.8 EA | $1,656 – $2,338 |
| 23/32-in x 4-ft x 8-ft CDX Douglas Fir Plywood Sheathing | 14.57 EA | $655 – $946 |
| 2-in x 10-ft Black Galvanized steel Drip Edge | 112.01 EA | $573 – $809 |
| Galvanized Roofing Nails | 5.6 LB | $45 – $84 |
| 36-in x 144-ft 432-sq ft Felt Roof Underlayment | 1.13 EA | $22 – $39 |
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How long it takes
- 1
Site Preparation & Safety 2-3 hours
Set up ladders and safety equipment, clear debris from the work area, and cover landscaping or valuables near the roof in your area.
- 2
Remove Damaged Materials 6-8 hours
Carefully remove shingles or roofing material, pull up nails, and cut out damaged decking sections while protecting surrounding areas in your area.
- 3
Install New Decking 8-10 hours
Measure, cut, and secure new plywood or OSB panels to match existing roof structure, ensuring proper alignment and fastening in your area.
- 4
Weatherproof & Restore Roofing 8-10 hours
Install underlayment, replace shingles or roofing material, and seal all seams and fasteners to restore weather protection in your area.
- 5
Inspection & Cleanup 1-2 hours
Inspect repairs for quality, remove debris, and ensure the site is clean and safe according to your area regulations.