How Much Does OSB or T1-11 Siding Cost in 2025?

Installing OSB or T1-11 siding costs an average of $2,500 for 500 square feet of siding space, ranging between $1,500 and $3,700 for most homeowners. Important factors that influence how much it costs to replace T1-11 siding include the material, the amount of labor required, and ongoing maintenance and repair costs.

Average OSB or T1-11 Siding Cost

OSB or T1-11 Siding Cost Factors

The cost to replace T1-11 siding is similar to installing OSB siding, though OSB siding can have a slightly lower average cost. While installing T1-11 siding averages $2,500 for 500 square feet of exterior wall space, covering the same area in OSB siding is about $2,200. Costs depend on a variety of factors, including the type of siding you choose and the size of your home. 

Home Size

Your home’s size determines how much material you’ll use. A larger home requires more labor and materials, directly affecting your T1-11 siding cost estimate. T1-11 siding is typically sold in 4-by-8-foot sheets, which have an area of 32 square feet.

Thickness

Not only does choosing between T1-11 plywood and OSB contribute to your final residing cost, but each material also comes in a range of thicknesses. Thicker OSB and T1-11 siding costs more than thinner panels of a similar style. 

T1-11 Prices by Thickness

On average, T1-11 siding costs about $33 per 4-by-8-foot sheet, but it can range from $25 to $45 depending on thickness and quality. T1-11 plywood consists of multiple layers of thin wood veneer. These layers are pressed and bonded together, increasing the material's dimensional stability. It works well as a siding material because the large panel size covers a bigger area than single boards of wood.

OSB Prices by Thickness

OSB siding costs an average of $29 per 4-by-8-foot sheet, ranging between $15 and $45 per sheet. OSB is slightly more affordable than plywood. Like T1-11 plywood, OSB is engineered lumber. In this case, the composite consists of compressed wood flakes that are bonded together by adhesive.

Labor

The labor cost to replace T1-11 siding is $45 to $166 per hour if you hire licensed and insured siding contractors in your area. However, that price can change if you hire a builder to install your siding, with labor fees averaging $52 to $220 per hour. The labor cost associated with hiring a handyperson is $34 to $130 per hour.

Accessibility

If you need to install T1-11 siding on a multi-story home or your landscape introduces additional challenges for your local siding installation pro, expect a 20% increase in labor fees.

Other Cost Factors

In addition to considering how much T1-11 siding costs per square foot in labor and materials, other vital cost factors include removal, cleanup, and ongoing maintenance. 

Removal 

Expect to pay $1 to $4 per square foot to remove your existing siding before installing new siding. 

Cleanup and Disposal

Cleaning and disposing of old or excess siding will cost an additional $150 to $200, on average. 

Ongoing Maintenance

Both OSB and T1-11 plywood siding require regular maintenance to extend their lifespan. The materials involved make them especially vulnerable to pests and water damage. 

T1-11 Plywood

Plywood sheets are less susceptible to water damage, so they have a longer lifespan and require less maintenance than OSB. In addition to painting, you can stain the exterior surface of T1-11 siding, which costs between $600 and $2,500, depending on the size of your home and the painters you hire. Staining allows for more personalization and provides more protection against water and pests.

Maintenance might include plugging holes or weak spots from weather exposure and natural knotholes. This can typically be done as a DIY project for minimal expense, though siding specialists tend to be more thorough to ensure the problem is fixed for good.

Most T1-11 siding has an average lifespan of 15 to 20 years. You can increase that lifespan by regularly staining or painting the exterior, fixing holes in the board before water can penetrate, and installing a gutter system to keep moisture away from the plywood. 

OSB

OSB is susceptible to water, which is why weatherproofing is an essential part of its maintenance. It needs to be primed and painted rather than stained, which helps with both appearance and waterproofing. Expect to pay between $700 and $2,000 to paint your wood-based siding.

Weatherproofing also includes properly sealing any edges you cut when building or repairing your OSB siding. Finally, consider adding a special weatherproof protection coating to the material, which costs between $30 and $50 per 3-gallon bucket at your local hardware store.

When your OSB board becomes cracked or broken, it's time to consider potential repairs. OSB siding repair costs vary depending on the type of repair necessary. Remove and replace old boards with new sheets. Depending on the size of the problem, these repairs fall on the lower end of the $600 to $1,400 average cost to repair wood-based siding.

What Are T1-11 and OSB Siding?

T1-11 siding, also known as plywood, is an affordable, durable type of composite wood with a range of customization options. OSB, which stands for oriented strand board, is made of wood chips and resin. It is then sealed with pressure and heat to form siding for your home. Due to its design, OSB is more prone to water damage, mold growth, wood expansion, and rot.

As metal siding costs considerably more, OSB and T1-11 siding are attractive options for homeowners on a budget. Compare vinyl siding installation costs and board and batten siding costs to guide your informed decision about what siding may be the best option for your home. 

T1-11 Plywood vs. OSB

If you’re trying to decide between plywood and OSB siding, there are several factors you should consider. 

T1-11 Plywood

T1-11 plywood typically keeps its shape over time, dries out quickly, and has many custom finishes and staining options. However, it is more expensive and has potential weak spots. 

OSB Siding

OSB siding is more affordable and has a more consistent density. However, it has limited personalization options, holds moisture longer, and can potentially warp and swell from water damage.

Budgeting for T1-11 Siding Installation

As you consider the cost to install 4-by-8-foot siding, whether it’s T1-11 plywood or OSB, strategic planning can help you significantly reduce your overall project cost: 

• Collect at least three competitive quotes from local contractors to accurately assess the cost of replacing T1-11 siding on your home. 

• Be diligent in keeping up with regular maintenance and cleaning to extend the life of your existing siding.

• Choose standard panel sizes to minimize custom cutting and reduce waste materials.

• Opt for mid-grade T1-11 siding of average thickness to balance durability and affordability.

• Coordinate with neighbors who may be thinking about replacing their home’s siding at the same time. 

• Check for local rebates and programs that may offer discounts on eco-friendly options.

How HomeAdvisor Gets Its Cost Data

No place is more important than your home, which is why HomeAdvisor connects homeowners with local pros to transform their houses into homes they love. To help homeowners prepare for their next project, HomeAdvisor provides readers with accurate cost data and follows strict editorial guidelines. After a project is complete, we survey real customers about the costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from 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.