How Much Does Roof Decking Cost to Replace? [2026 Data]

In 2026, the national average cost for roof sheathing installation is $6,400, with most homeowners paying between $2,600 and $9,000, depending on sheathing material, roof size, and pitch. On the high end, costs can reach up to $35 per square foot for complex or large-scale projects.

Roof Decking Replacement Cost: By Type

When you think of a roof, you imagine overlapping tiles or sleek metal sheets, rarely does anyone think of what's underneath. Roof sheathing is the integral layer of thick wooden boards that are attached to the skeleton of the roof and provide both an important barrier between your home and outside and a solid foundation on which to attach underlayment and roofing tiles.

Roof sheathing installation costs $6,400 on average, though it ranges from $1,900 for small, simple roofs to $17,000 for large, high-pitched roofs.

Roof sheathing comes in three types, solid, open, and plank, and the type you choose directly affects your material and labor costs. Solid sheathing is the most common option because it creates a continuous layer without gaps, while open sheathing requires large tiles such as sheet metal to bridge those gaps. Plank sheathing is the least common choice because it is more labor-intensive and carries a higher material cost than the other options. Costs vary by type, as the breakdown below shows.

Cost of OSB vs. Plywood Roof Sheathing

There are two primary materials used when constructing solid roof sheathing: oriented strand board (OSB) and plywood. While they are hard to tell apart, OSB is more popular due to its lower cost and similar application. However, plywood is stronger than OSB, so if you have a particularly heavy roofing material, it's the better choice.

Roof Decking Cost by Square Foot: Project Size

Roof sheathing typically costs $2 to $6 per square foot, and the size of your roof is the single biggest driver of your total project cost. Costs vary by roof size, as the breakdown below shows.

Roofing Professional Costs: Hourly Rates

A local roofing professional typically charges $30 to $90 per hour, or a project-based fee of 20% to 50% of total costs depending on equipment needs and roof accessibility. Because roofing pros specialize exclusively in roof work, they are a stronger choice than general contractors when your project is limited to roof sheathing installation.

General Contractor Costs: Project Pricing

General contractors typically give a roofing estimate in the same price range as a roofing professional, and sometimes slightly less. They commonly price work as time-and-materials or as a lump-sum percentage contract, per ways contractors price their work. Unless you are bundling additional home projects into the same job, a dedicated roofing pro is the better choice for a standalone sheathing installation.

Roof Sheathing Costs by Location: Regional Differences

Roof sheathing costs vary significantly by region because transportation fees, local labor rates, and site accessibility all influence the final price. High-cost markets such as San Francisco and New York sit at the top of the range, while Midwest cities tend to come in lower. Areas near wood mills, such as the Pacific Northwest and deep South, can also see reduced material costs due to shorter supply chains. Costs vary by city, as the breakdown below shows.

Roof Sheathing Costs: What Determines the Price?

Demolition and Prep 

Demolition for roof sheathing replacement runs $25 to $80 per worker per hour, while prep work, which requires specialized roofing expertise, costs $35 to $110 per worker per hour.

Permits

Roof sheathing installation almost always requires a building permit because it directly supports a structural component of your home, and you can expect to pay $400 to $1,500 for the cost of a permit. Pulling the proper permit also protects you during future inspections and insurance claims.

Repairs

Repairing roof sheathing on an already-installed roof costs more than standard roofing repairs, which average around $1,200, because the top roofing layer must be removed first to gain access to the sheathing beneath. Given that added labor and the likelihood that water damage affects a wide area, full replacement is often more cost-effective than a targeted repair.

Why You Should Hire a Pro for Roof Decking Replacement

Hiring a local roofing contractor for roof decking replacement costs more upfront, but you benefit from expert evaluation, correct material selection, and proper installation that ensures your roof’s longevity and structural integrity. Professionals bring the right tools, skills, and experience to replace roof decking safely, preventing potential issues down the road.

Here’s why it’s ideal to hire a roof decking replacement pro

Replacing roof decking involves removing damaged materials, installing new boards, and ensuring that everything is properly aligned and secured for long-term protection. Here are some of the top reasons to work with a pro:

• Professionals know how to safely remove old, deteriorated decking and install new materials without causing further damage to your roof’s structure.

• They understand how to choose the right type of decking material (e.g., plywood, OSB, or other specialized boards) to ensure your roof’s load-bearing capacity and moisture resistance.

• Hiring a pro ensures that your decking is installed to meet local building codes, preventing potential problems with insurance or future inspections.

• Many contractors can also offer additional services, like upgrading underlayment, inspecting rafters, or installing roofing materials at the same time, which can help save on overall costs.

Roof Sheathing Replacement vs. Repair

Roof sheathing is unique in that it’s underneath your roofing material. It’s only in very rare cases that sections of the roof are removed just to access the sheathing and in most cases, the sheathing itself is protected from physical damage from the roofing itself. If there is damage to the sheathing, it likely damages all of it in the form of water damage. 

So, when it comes to deciding whether to replace or repair, it often makes sense to replace the entire roof sheathing. Repair options commonly exceed the 50% rule of repairs which states that if a repair costs more than 50% of the project cost, you're better off just replacing it.

Tips to Reduce Cost While Installing Roof Decking

Both plywood and OSB boards are cost-effective materials and labor isn’t something that you can negotiate much. However, here are some other tips to try and reduce costs.

• Try to purchase plywood in larger quantities to get bulk discounts. 

• Get price quotes from multiple roofers to find the best deal. 

• Perform regular inspections so no large issues grow over time, which ultimately cost far more. Even if some parts of the roof aren’t expensive, the labor most certainly will be. 

• Look into any local or federal programs that offer rebates or tax credits for roof replacements.

Does Roof Sheathing Increase Home Value?

Roof sheathing isn't something a buyer sees and if your roof is in good condition it's probably because there's solid sheathing underneath. When considering the effect on home value it's more about how not having sheathing will severely drop the value of the home more than the presence of it will raise its value. If the shooting is new that may result in an increased return on investment but at most, you can expect to see a 50% recoup of the cost. An alternative gain is in the form of increased energy efficiency.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.