What is the best species of wood to install on exterior applications exposed to the weather?

Choosing the right type of wood for exterior applications is crucial for durability and longevity, especially when the wood will be exposed to weather conditions. Redwood is considered the best choice for such applications due to its inherent qualities. It is naturally resistant to decay, moisture, and insect damage, making it well-suited for outdoor use. The high tannin content in redwood helps ward off pests, and its natural oils provide a degree of water resistance, allowing it to withstand rain, humidity, and temperature fluctuations effectively.

In contrast, while other types of wood have their applications, they may not offer the same level of performance as redwood in outdoor settings. For example, pine can be more susceptible to rot and warping when exposed to moisture without proper treatment. Balsa is lightweight and not durable enough for outdoor use, making it unsuitable for exterior applications. Douglas-fir, while stronger and commonly used in construction, does not have the same level of natural weather resistance as redwood, often requiring additional treatments to protect against the elements.

Thus, redwood stands out as the most reliable option for exterior applications due to its natural durability and weather-resistant traits.