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2026 project cost

Repair Roof Decking Cost

By Muhammad Tayyab Updated Published

$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.

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sq ft

Estimated total

$3,747 – $5,292

materials + labor

Materials—
Labor—
Per sq ft—

What the materials cost

What you are paying for
Cost composition for repair roof decking Materials $4,216, 80 percent. Labor $1,076, 20 percent
  • Materials 80% · $4,216
  • Labor 20% · $1,076

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. 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. 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. 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. 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. 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.

Frequently asked questions

How much does it cost to repair roof decking?

$3,747 to $5,292 for 400 sq ft. That splits into $2,952 to $4,216 in materials and $796 to $1,076 in labor across 12 hours, with no permit fee included. Cost depends on how many sheets are actually soft, which is rarely known until the covering comes off.

Do I need a permit to repair roof decking in your area?

No. At $3,747 to $5,292 this sits on the maintenance side of the line in most of your area. It becomes permitted work once more than a small area of decking comes off, which most codes treat as structural.

What drives the cost of repairing a roof decking the most?

Materials run about 80% of the total and labor 20%. The two heaviest lines are silver aluminum roll flashing and cdx douglas fir plywood sheathing, the first reaching $2,338 on its own. Labor lands around $1,076 at a billed crew rate, which is the part that moves most by state.

Is repairing roof decking covered by a home warranty or insurance?

Usually not. Policies cover sudden damage, not wear, and routine work like this reads as maintenance to an adjuster. The exception is when a covered event caused it, in which case the $3,747 to $5,292 range here is worth weighing against your deductible.

What are the common signs that roof decking needs repair?

Common signs that your roof decking in your area needs repair include visible sagging, water stains on the ceiling, and a musty odor in the attic. Addressing these issues promptly can prevent further damage and costly repairs.

How long does roof decking repair typically take in your area?

The longest stretch is install new decking at 8-10 hours, with weatherproof & restore roofing adding 8-10 hours. Across all 5 stages that is repairing a roof decking start to finish.

Can I perform roof decking repair myself, or should I hire a professional?

While some homeowners in your area may attempt DIY roof decking repairs, it is generally recommended to hire a professional. A licensed contractor can ensure the repair is done safely and in compliance with local building codes.

Why order more material than the measured area?

A 12% waste allowance is built in. On this job that is the difference between 100 and 112 ea of black galvanized steel drip edge.

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