Which type of wood is likely to have a slower burn rate?

A rough sawn wood typically has a slower burn rate compared to other finishes because its texture affects how air circulates around the wood. The irregular surface of rough sawn lumber can trap air and create pockets that can slow down the combustion process. This texture also tends to have larger flaws and fibers that take longer to ignite and burn.

In contrast, engineered wood, smooth finished wood, and other types of wood may have more uniform surfaces that promote faster burn rates. Engineered wood products often include adhesives and chemicals that can enhance their combustibility, leading to quicker burning. Similarly, a smooth finish can facilitate airflow, which is conducive to faster combustion.

Overall, the characteristics of rough sawn wood, including its texture and moisture content, contribute to its slower burn rate, making it the correct choice in this scenario.