The Best Practices for Preserving Wood Outdoors: Tips and Techniques
Wood is a versatile and beautiful material, widely used for various outdoor applications such as decks, fences, and furniture. However, preserving it from the elements can be challenging. In this article, we will explore the best methods for preserving wood outdoors, focusing on both traditional and innovative approaches.
Introduction to Wood Preservation
Wood naturally decays when exposed to moisture, fungi, and insects. The best preservative I've used is Thompsons Water Seal, which I applied to a shed plywood 26 years ago, and it has shown no signs of rot. Pressure-treated wood is another effective option, although it may not be suitable for all purposes. Pressure-treated wood contains arsenic and copper sulphate, which are toxic and should be handled with caution. If you are working with large projects involving pressure-treated wood, it is crucial to wear a mask and wash your hands thoroughly after handling.
Effective Preservation Methods
One of the most effective methods for preserving wood is to fill the voids with epoxy putty. This helps prevent water seepage and extends the life of the wood. To achieve optimal results, you should clean the surface with emery and then clean it with a dry cloth to remove any powdery residue. After preparing the surface, apply a transparent or translucent polyurethane coating. This coating will help retain the original texture and protect the wood from humidity.
When I tried various methods of preserving wood, I found that none were completely effective until I soaked the wood in a preservative. However, this only sealed the sides and ends, leaving the interior vulnerable to decay. The best preservative I initially used, pentachlorophenol, has been removed from the market due to concerns about its impact on the food chain. The only reliable way to ensure that wood does not decay is to use pressure-treated wood, which is guaranteed to last for many years.
Alternative Options
For smaller projects, you can use either a spray or brush-on wood preservative. These preservatives work well for both small and large projects. For instance, I have sprayed wooden bird houses, which I then painted with water sealer, and these houses have lasted for 3 to 4 years.
Another effective method is to use black locust wood, which is highly resistant to rot and ideal for ground contact areas. If you have wooden posts that need to withstand ground contact, you can soak their ends in used motor oil for several weeks. Alternatively, you can use treated wood, which is guaranteed to survive for up to 40 years in contact with the ground.
By incorporating these best practices, you can ensure that your outdoor wood projects remain resistant to decay and retain their beauty for many years.