Wood Will Do What Wood Wants To Do
Embracing the Nature of Wood: Understanding Humidity and Wood Movement in Wisconsin
As we transition into that time of year in Wisconsin when humidity levels fluctuate dramatically, woodworkers in the area know all too well the challenges that come with it. The change in humidity can lead to cracking and warping, making it crucial for anyone working with wood to understand its behavior. If you’ve ever spent time with me discussing woodworking, you may have heard me say, “Wood will do what wood wants to do.” This phrase encapsulates the unpredictable nature of wood and serves as a reminder that even the finest, straight-grained, kiln-dried lumber can succumb to its environmental elements.
The Impact of Milling on Wood
One of the most common issues we face in the woodshop occurs right after a board is milled. Milling removes the outer surface of the wood, which is typically the driest part. With fresh wood exposed to the air, it can dry out quickly and begin to shrink. This process can lead to cracks and checks, which are small cracks that appear at the ends of the boards.
Moreover, milling alters the structure of the wood, potentially allowing it to twist, warp, or cup. To mitigate these issues, I recommend milling your wood to near its finished dimensions and then allowing it to acclimate for a day or so before completing the milling process. This approach gives the wood time to adjust to its new environment and reduces the likelihood of unexpected movement.
Designing for Wood Movement
When building projects, consider wood movement and incorporate it into your design. For instance, drawer bottoms and door panels should be left loose rather than glued in place. This practice allows for natural expansion and contraction without causing damage to the structure.
Additionally, when sizing drawers, keep in mind the seasonal movement of wood. On a dry winter day in Wisconsin, a snug drawer may fit perfectly, but come summer, it could become nearly impossible to open. Anticipating these changes will save you from frustration and ensure your projects remain functional year-round.
The Science of Wood Behavior
There’s a significant amount of science that can help us predict how wood will behave, regardless of where our projects end up or how quickly the weather changes. Resources like the article from Fine Woodworking delve deeper into the principles of wood movement and how to account for it in your designs. Understanding concepts like moisture content, wood species, and grain orientation can help you make informed choices that enhance the durability of your work.
The Unpredictable Nature of Wood
Despite our best efforts and the scientific principles we apply, the truth is that you can only partially predict how a piece of wood will react. Most of the time, with proper planning, everything goes smoothly. But just when you least expect it, a board may surprise you, leading to unexpected issues that can derail your project entirely.
When this happens, remind yourself: “Wood will do what wood wants to do!” This acceptance of the unpredictable nature of wood is part of what makes woodworking both challenging and rewarding. Each piece tells its own story, and as craftsmen, we must learn to adapt and embrace the unique characteristics of the materials we work with.
Conclusion
As we navigate the seasonal changes in Wisconsin, let’s keep in mind the lessons that wood teaches us. By understanding its nature, planning for movement, and accepting the unpredictability, we can create beautiful, lasting pieces that withstand the test of time. So, the next time you’re in the shop and face a challenge, remember that it’s all part of the journey. Embrace the wood, and let it guide you in your craft!
