How does cedar’s natural resistance to wood-boring insects compare to treated pine?

Cedar and treated pine are both popular choices for outdoor and structural applications, but their resistance to wood-boring insects differs significantly. Cedar naturally contains oils and compounds like thujaplicin that repel insects, making it highly resistant to pests such as termites and beetles without chemical treatment. In contrast, treated pine relies on preservatives like copper azole or alkaline copper quat (ACQ) to deter insects, which can leach out over time, reducing its effectiveness. While treated pine offers strong initial protection, cedar’s natural durability often provides longer-lasting resistance. However, treated pine may be more cost-effective for high-moisture environments where cedar’s natural oils degrade faster. Choosing between the two depends on budget, environmental conditions, and desired longevity.