Drying outdoor wood, particularly freshly sawn lumber, primarily involves stacking it properly to ensure adequate air circulation, allowing moisture to evaporate naturally over time.
Key Steps for Drying Outdoor Wood
Effective outdoor drying relies on strategic stacking and protecting the wood from the elements while maximizing airflow. The process is often referred to as air-drying.
Proper Stacking Techniques
Correct stacking is fundamental to successful outdoor drying. As stated in the reference:
- Stack the lumber in neat layers as soon after sawing as possible. This minimizes potential issues like staining or warping that can occur if wood sits wet for too long.
- Leave a 1- or 2-inch space between boards within a layer. This side-to-side spacing helps air move across the surface of each board.
- Wood strips, called “stickers,” provide the space between layers to allow air movement. Stickers are typically uniform strips of dry wood placed perpendicular to the boards at regular intervals along the stack's length. This vertical separation allows air to flow freely over the top and bottom surfaces of each layer.
Table: Stacking Essentials
| Element | Purpose | spacing/Placement | Material |
|---|---|---|---|
| Boards | The wood being dried | 1-2 inches apart within a layer | Freshly sawn wood |
| Stickers | Create space between layers | Perpendicular to boards, regularly spaced | Dry wood strips |
| Airflow | Evaporates moisture | Flows between boards & layers | N/A |
Site Selection
Choosing the right location for your wood stack is crucial for drying:
- Choose a level, well-drained area. This prevents moisture from wicking up into the bottom layer of wood.
- Select a spot with good air circulation. Avoid enclosed spaces or areas directly against buildings where airflow is limited.
- Consider sunlight exposure. While some sun can aid drying, excessive direct sunlight can cause rapid drying leading to cracking and warping. A partially shaded location is often ideal.
Protection from the Elements
While outdoor drying uses natural conditions, protecting the stack from rain and excessive sun is vital:
- Cover the top of the stack. Use a waterproof cover (like a tarp or roofing material), but ensure it doesn't drape down the sides, which would block airflow. The cover should act like a small roof.
- Elevate the stack. Place the bottom layer of wood or supporting timbers on blocks or a foundation to lift the wood off the ground (e.g., 6-12 inches). This improves airflow underneath and prevents moisture absorption from the soil.
Monitoring and Patience
Air-drying takes time, often months or even years, depending on the wood species, thickness, climate, and desired moisture content.
- Regularly check the stack to ensure stickers haven't shifted and the cover is secure.
- Monitor the wood for signs of mold or insect activity. Good airflow significantly reduces these risks.
By carefully stacking wood with appropriate spacing using stickers and selecting a suitable, protected location, you can effectively dry outdoor wood using natural airflow.
