Raw lumber, often referred to as rough sawn or rough cut lumber, is wood that has been minimally processed after being harvested.
Based on the definition provided, raw lumber is untreated and cut into planks. It represents wood in a natural state, retaining much of its original characteristics after milling.
Characteristics of Raw Lumber
Understanding the specific traits of raw lumber helps differentiate it from more processed wood products.
Key Features:
- Untreated: It has not undergone chemical treatments like preservatives or finishes.
- Cut into Planks: It is milled from logs into various dimensions of planks.
- Strength: Generally, it is considered stronger than other types of lumber because it retains more of its natural integrity.
- Moisture Content: It typically carries extra moisture compared to kiln-dried lumber as it hasn't been subjected to a drying process in a kiln.
Why Moisture Matters
The high moisture content in raw lumber is a significant factor. It means the wood is heavier and prone to shrinking, swelling, or warping as it dries naturally over time. This needs to be accounted for during construction or project planning.
Raw vs. Processed Lumber
Comparing raw lumber to other types highlights its distinct qualities:
| Feature | Raw Lumber (Rough Sawn) | Processed Lumber (e.g., Kiln-Dried, Planed) |
|---|---|---|
| Treatment | Untreated | Often treated (e.g., dried, planed, sealed) |
| Surface | Rough, uneven texture | Smooth, uniform texture |
| Moisture | High (extra moisture) | Low (kiln-dried) |
| Strength | Generally stronger | Strength can vary based on process |
| Stability | Less stable (prone to movement) | More stable |
| Appearance | Natural, less finished look | Uniform, finished look |
Raw lumber is often chosen for projects where strength is paramount or where a rustic, unfinished aesthetic is desired. However, its moisture content and rough surface mean it may require further processing (like drying or planing) depending on the final application.
