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How Long Does it Take for a Cedar Post to rot?

Cedar is a type of wood that is known for its durability and resistance to rot, making it a popular choice for outdoor structures such as fences and decking. However, cedar is not immune to rot, and eventually, even cedar posts will deteriorate over time. Understanding the factors that contribute to rot and how long it typically takes for a cedar post to rot can help you make informed decisions about your outdoor structures and projects.


The longevity of a cedar post depends on several factors, including the environment in which it is installed, the thickness of the post, and the type of cedar used. Cedar posts that are installed in a dry, well-drained area and are thick enough to resist warping will last longer than those that are installed in a damp area or are too thin.


According to a study conducted by the United States Department of Agriculture (USDA), cedar posts that are installed in a dry environment can last for up to 25 years without rotting (Source: USDA Forest Service, General Technical Report FPL-GTR-113). However, in a damp environment, cedar posts may only last for 5-10 years before showing signs of rot. The type of cedar used can also affect the longevity of the post, with some species of cedar lasting longer than others.


To ensure that your cedar posts last as long as possible, it is important to take steps to protect them from moisture. This includes installing them in a dry, well-drained area and using a sealant to protect the wood from water damage. Additionally, it is important to regularly inspect your cedar posts and make repairs as needed to prevent rot from spreading.

In conclusion, the longevity of a cedar post depends on several factors, including the environment in which it is installed, the thickness of the post, and the type of cedar used. Cedar posts that are installed in a dry, well-drained area and are thick enough to resist warping can last for up to 25 years without rotting, while those installed in a damp environment may only last for 5-10 years before showing signs of rot. To ensure that your cedar posts last as long as possible, it is important to take steps to protect them from moisture and to regularly inspect and repair them as needed.

If you would like to element the idea of having rotting posts all together we would recommend using steel posts. Here at Ridgeline Fence and Deck, our team of recommended fence contractors in the Minneapolis metropolitan area only install steel posts for our wood fence installations. Want to learn more? Click Here!

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