Is Plywood Good for Boarding the Outside of a Garden Shed?

Plywood can be a cost-effective and versatile choice for boarding the outside of a garden shed, but it requires the right type, proper application, and diligent maintenance to ensure durability and weather resistance.

Understanding Plywood for Shed Boarding

The success of using plywood for a garden shed largely depends on the type of plywood you choose and the quality of installation. Exterior-grade or marine-grade plywood is specifically designed to withstand moisture and outdoor conditions, making it a suitable choice for shed boarding.

Types of Plywood

For an exterior application, it's advisable to use plywood with an 'X' grade stamp, indicating it is treated with exterior-grade adhesives that are moisture-resistant. However, even with these adhesives, the wood plies themselves can absorb moisture, causing warping or buckling. To prevent this, it is essential to apply a weather-resistant finish such as paint or a sealant.

Important Considerations

Choosing the Right Plywood

When selecting plywood for your garden shed, consider the following:

Grading: Use exterior-grade plywood which is designed to withstand moisture and the elements. Thickness: Typically, a 3/4-inch thickness is sufficient for siding, but 1/2-inch plywood can also work depending on the shed's structure. Finish: Apply a weather-resistant finish such as paint or a sealant to protect the plywood from moisture, UV rays, and insects.

Proper Installation Techniques

To minimize water infiltration and ensure the longevity of your plywood, follow these installation tips:

Overlapping Joints: Overlap the joints to create a tight seal and prevent water from seeping through. Fasteners: Use appropriate fasteners to secure the plywood to the frame, ensuring a secure fit. Edge Protection: Use weather-resistant sealant around the edges to further protect against moisture. Leak Prevention: Ensure that the plywood is level and properly fitted to prevent any gaps or leaks.

Other Options for Shed Boarding

While plywood is a viable choice, there are other materials you might consider for improved weatherproofing:

Cement Board: This is heavy and more difficult to handle but is almost waterproof. It's a great choice for areas with high moisture exposure. OSB with Sealer: Oriented strand board (OSB) with an integral sealer, such as “Smartieboard,” is rot and moisture-resistant, providing an excellent alternative to plywood. Plywood Siding: Materials like T1-11, made from pine or cedar, are specifically designed for exterior use and provide a warranty when painted.

DIY or Professional Installation?

Many homeowners choose to install plywood themselves to save costs, but this can be a challenging and time-consuming task, especially for those without woodworking experience.

One homeowner mentioned, “I needed to build myself a good shed so I decided to give the process a try. It ended up better than I had expected.” By carefully following instructions and taking the right precautions, such as using the appropriate plywood type and protective finishes, even a novice can achieve a professional-looking result.

After one month of diligent work, not only was the shed completed, but it met the homeowner's standards and pleased his wife. This DIY approach can be rewarding and cost-effective, but it's important to take the necessary steps to ensure the longevity of the shed.

Conclusion

While plywood can be a good choice for boarding the outside of a garden shed, it's crucial to use the right type, apply protective finishes, and ensure proper installation. By doing so, you can significantly extend the life of your shed and enjoy its benefits for many years to come.