What Is the Best Plywood for Roofing?

Regarding roofing, the type of material is of utmost importance. Among the options available, plywood is famous for its affordability, durability, and ease of installation. This article will examine what makes good plywood for roofing and explore some of the best options.

What to Look for in Roofing Plywood

Before diving into the specific types of plywood, it’s essential to understand what makes good plywood for roofing. Here are some key factors to consider:

• Strength and Durability: The plywood used for roofing should be able to withstand the weight of the roofing materials and any weather conditions it may be exposed to. It should also resist warping and splitting.
• Moisture Resistance: Moisture can cause the plywood to swell, warp, and rot. For this reason, roofing plywood should be able to resist moisture and prevent water from seeping in.
• Thickness: Plywood used for roofing typically ranges from 3/8 inch to 3/4 inch. The thickness needed will depend on the rafters’ spacing and the roofing materials’ weight.
• Compatibility: The plywood used for roofing should be compatible with the installed roofing material. Some roofing materials, such as asphalt shingles, require a specific type of plywood.

Types of Plywood for Roofing

Now that we know what to look for in roofing plywood, let’s take a look at some of the best options available:

1. CDX Plywood: CDX plywood is a common choice for roofing because it’s affordable and readily available. It’s made from layers of softwood veneer and is rated for exposure to moisture. CDX plywood is typically 3/4 inch thick and compatible with most roofing materials.
2. OSB Plywood: Oriented Strand Board (OSB) plywood is another popular option for roofing. It’s made from thin wood strands glued together to form a robust and durable panel. OSB plywood is typically 7/16 inches thick and compatible with most roofing materials.
3. Marine Plywood: Marine plywood is made from hardwood veneers and is designed to resist moisture and rot. It’s typically used for boat building but can also be used for roofing in areas with high humidity or heavy rainfall. Marine plywood is available in various thicknesses and is compatible with most roofing materials.
4. Exterior Grade Plywood: Exterior grade plywood is made from hardwood or softwood veneers and is designed to withstand exposure to the elements. It’s typically used for siding and other outdoor applications but also roofing. Exterior-grade plywood is available in various thicknesses and is compatible with most roofing materials.
5. Fire-Rated Plywood: Fire-rated plywood is designed to resist fire and is typically used in commercial buildings or areas where building codes require fire resistance. It’s available in various thicknesses and is compatible with most roofing materials.

Choosing the Right Plywood for Your Roof

When selecting suitable plywood for your roof, it’s essential to consider the factors outlined above and the specific requirements of your roofing material. If you need help determining which type of plywood to use, consult with a roofing professional or refer to the manufacturer’s instructions for your roofing material.

In addition to selecting the correct type of plywood, it’s essential to ensure it is installed correctly. The plywood should be nailed securely to the roof rafters and should be adequately spaced to ensure that the roofing material is properly supported.

Where to Buy Plywood

Plywood can be purchased from a variety of locations, including:

1. Home Improvement Stores: Home Depot, Lowe’s, and Menards are all examples of home improvement stores that carry plywood in various sizes and grades.
2. Lumber Yards: Lumber yards and specialty wood stores often have a more comprehensive selection of plywood, including higher-end options like marine and hardwood.
3. Online Retailers: Amazon, eBay, and other online retailers often carry plywood, and you can usually find a variety of sizes and grades to choose from.
4. Local Hardware Stores: Smaller hardware stores may have a smaller selection than larger chains, but they still often carry several types of plywood.
5. Wholesale Clubs: Some wholesale clubs like Costco and Sam’s Club may carry plywood in larger quantities, which can be helpful if you have a large project to complete.

When purchasing plywood, consider the material’s grade, thickness, and intended use to ensure you get the right product for your project.

Professional Plywood Installation

Professional plywood installation requires careful planning, preparation, and attention to detail. Choosing the proper plywood for the project is essential, considering factors such as grade, thickness, and intended use of material. Once you have the appropriate plywood, it is essential to prepare the surface where it will be installed. It may involve cleaning, sanding, and leveling the surface to ensure the plywood is flat and adhere properly.

Next, carefully measure and cut the plywood to the desired size and shape. It can be done using various tools, such as a circular saw or jigsaw, and should be done precisely to ensure a tight fit. Once the plywood has been cut, it should be dry-fit to ensure that it fits correctly and that you can make any necessary adjustments.

Before installing the plywood, applying an appropriate adhesive to the surface is essential to ensure a strong bond. The plywood should then be carefully positioned and secured using screws or nails to avoid overdriving the fasteners. Once the plywood is in place, any seams or gaps should be filled with wood putty or caulking to ensure a smooth and even surface.

Finally, the plywood should be sanded and finished according to the desired specifications. It may involve applying a stain, sealer, or paint to protect the plywood and enhance its appearance. Professional plywood installation requires careful planning, precision, and attention to detail to ensure a high-quality and long-lasting result.