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How Long Will Kiln Dried Wood Last Outside? – A Comprehensive Guide

Understanding Kiln Dried Wood

Kiln dried wood is a popular choice for firewood due to its low moisture content, typically below 20%, which enables it to burn efficiently and cleanly. This is achieved through a controlled drying process in a kiln, which removes moisture more effectively than traditional air drying.

Longevity of Kiln Dried Wood Outdoors

When it comes to storing kiln dried wood outdoors, several factors influence its longevity:

  1. Protection from Elements: If left unprotected, it can reabsorb moisture from the environment. This can be mitigated by storing the wood off the ground and covering it with a waterproof but breathable cover. Ideally, wood should be stored in a dry, ventilated area like a shed or under a canopy.
  2. Impact of Climate: The local climate plays a significant role. In humid regions, wood is more susceptible to moisture absorption, while in dry areas, it can remain in good condition for longer.
  3. Seasonal Variations: Seasonal changes, particularly during winter and rainy seasons, can accelerate moisture absorption. Proper storage is crucial during these periods.
  4. Pest and Decay Resistance: Kiln drying kills insects and fungi present in the wood. However, if stored improperly, the wood can still be vulnerable to new infestations and decay.

Estimated Lifespan

While there’s no definitive answer, properly stored kiln dried wood can last for several years without significant degradation in quality. The key is to ensure it remains dry and is protected from direct contact with soil or water.

Tips for Maximizing Lifespan

  • Store wood off the ground on pallets or racks.
  • Use a cover that allows air circulation to prevent moisture build-up.
  • Regularly check the wood for signs of moisture or pest infestation.
  • Rotate the stock, using the oldest wood first.


Kiln dried wood is an excellent choice for long-lasting firewood, provided it’s stored correctly. By following these guidelines, you can ensure your wood remains dry, efficient, and ready to burn whenever needed.

For more information on kiln dried logs and firewood storage, visit Ribble Valley Log Supplies’ Firewood Guide, which offers detailed insights into different types of firewood and their properties.