Can Kiln Dried Wood be Stored Outside?

One of the most pressing questions for woodworking enthusiasts and professionals alike is whether kiln-dried wood can be stored outside. While it might seem convenient to leave lumber outdoors to save space, understanding the potential risks and best practices can help you make an informed decision and maintain the longevity and quality of your woodworking projects.

In this guide, we'll delve into the science behind kiln-dried wood, its storage needs, and the potential consequences of leaving it outside. We'll also provide you with practical tips on how to store kiln-dried wood correctly to minimize moisture content and preserve its characteristics for an optimal woodworking experience.

Understanding Kiln-Dried Wood

The process of kiln-drying removes excess moisture from fresh-cut wood, reducing its moisture content (MC) to a level suitable for woodworking. Kiln-dried lumber typically has an MC of 12% or lower, ensuring it's dimensionally stable and minimizes the risk of movement during construction or installation.

While kiln-drying significantly improves the wood's stability, it's crucial to maintain this desired MC level for the best results. Exposing kiln-dried wood to the elements can lead to excessive moisture changes, causing it to warp, cup, or twist, and compromising its integrity for your projects.

Why Avoid Storing Kiln-Dried Wood Outside?

Leaving kiln-dried wood outside exposes it to varying humidity levels and precipitation, which can potentially alter its MC significantly. During rainy or humid periods, wood may absorb moisture, causing it to swell and potentially decay. Conversely, dry and windy conditions can lead to excessive moisture loss, making the wood prone to cracking and shrinking.

Moreover, outdoor storage can make the wood more susceptible to pests, such as termites, mold, and mildew. Physical damage from inclement weather, such as hail or snow, can also occur. This can result in reduced quality and increased waste, making outdoor storage less cost-effective and more time-consuming in the long run.

Exceptions and Best Practices for Outdoor Storage

There are some circumstances where temporary outdoor storage of kiln-dried wood might be necessary. For instance, if you're awaiting further instructions from your supplier or need to accommodate a larger load than your indoor storage can handle. In such cases, it's crucial to follow these best practices:

• Keep the wood off the ground and away from direct contact with moisture, using pallets, spacers, or a raised platform.
• Cover the woodpile with a waterproof, breathable tarp to protect it from rain and snow while allowing airflow, which helps prevent condensation and mildew growth.
• Monitor the weather forecast and bring the wood indoors if heavy rain, snow, or excessive humidity is expected.

If possible, it's best to store kiln-dried wood indoors in a location with consistent temperature and humidity levels, such as a garage, workshop, or dedicated lumber storage area. However, if indoor space is limited, understanding the potential risks and implementing best practices can help mitigate the consequences of temporary outdoor storage.

Proper Indoor Storage for Kiln-Dried Wood

Storing kiln-dried wood indoors offers better humidity and temperature control, preserving its stability and quality. By maintaining an indoor storage environment with a consistent MC between 40% and 60%, you can help keep your wood's MC stable and minimize the risk of movement or degradation.

To achieve this, you can use dehumidifiers, humidifiers, or air conditioning units to monitor and regulate your indoor humidity levels. Additionally, ensure the wood is stored off the ground and away from exterior walls to prevent direct contact with moisture sources and maintain adequate airflow.

Storing Wood Long-Term

If you have a significant amount of kiln-dried wood to store for extended periods, investing in dedicated lumber storage solutions can provide optimal ventilation, temperature, and humidity control. These structures, often called "wood barns" or "lumber storage sheds," can be custom-built or purchased as prefabricated kits.

Long-term indoor storage of kiln-dried wood also allows you to organizing your stock efficiently, making it easier to access and maintain an inventory of your materials. This can help improve your woodworking workflow, save time and money, and increase the longevity of your lumber.

Proper Stacking and Racking Techniques

When storing kiln-dried wood indoors, following proper stacking and racking techniques ensures optimal airflow and prevents damage. Stick to the following guidelines:

• Use narrow sticks or spacers to elevate the first layer of wood off the ground, allowing air to circulate freely beneath the stack.
• Stagger the joints of each layer, ensuring each piece overlaps the one below it by at least half. This creates a surface for the next layer to sit on, promoting ventilation and preventing warping.
• Avoid leaning wood against walls or other surfaces, as this can trap moisture and lead to staining or discoloration.
• Keep similar-sized andspecies wood grouped together for easier organization and to prevent excessive mixing, which can increase storage time and waste.

By following these best practices, you can help maintain the quality and longevity of your kiln-dried wood, ensuring it remains suitable for your woodworking projects.

In summary, while it's tempting to store kiln-dried wood outside to maximize space, the risks of moisture and pest-related damage, as well as potential quality deterioration, often outweigh the benefits. By understanding the unique properties of kiln-dried lumber and implementing proper storage practices, you can preserve the quality of your woodworking materials and maintain a successful workshop. So, invest in dedicated indoor storage solutions, follow recommended stacking techniques, and monitor your wood's environment to ensure its longevity and optimal performance in your woodworking projects.