Yes, cedar pergolas are durable. Cedar has a natural ability to resist rot and insects. In addition, cedar also resists warping (no matter how hot or cold it may get in the area in which you live), as well as mildew. It can also withstand a variety of weather conditions. Cedar is prized for its ability to stand tall and remain sturdy for years on end, which is why it's commonly used for a variety of outdoor uses, not just pergolas.