What should be considered when selecting lumber for exterior use?

When selecting lumber for exterior use, moisture resistance and treatment for decay are crucial factors to consider due to the exposure to various weather conditions. Wood used outside faces challenges like rain, humidity, and temperature fluctuations, which can lead to rot, mold, and insect infestations if not properly managed.

Choosing lumber that has been specifically treated to withstand moisture will help prolong its lifespan and maintain its structural integrity. For example, pressure-treated wood is commonly used for outdoor projects because it has been infused with preservatives to resist decay and insects. This treatment is essential for applications such as decks, fences, and outdoor structures, where durability is key for long-term performance.

While cost and availability, ease of cutting and shaping, and aesthetic appeal are relevant considerations in lumber selection, they do not directly address the specific needs for durability and resistance to the elements that are critical for exterior applications. Therefore, prioritizing moisture resistance and decay treatment ensures that the lumber will perform well and maintain its quality over time in outdoor environments.