Clean and Prepare the Wood Surface
Before applying any protective treatment, it’s important to properly clean and prepare the wood’s surface. This allows for maximum absorption and adhesion of the natural treatment.
- Use a wire brush to remove any loose debris, mold, mildew or existing finishes from the wood. Pay extra attention to cracks and crevices.
- Sand the wood lightly with 120-150 grit sandpaper to roughness and remove any remaining stains or discoloration.
- Wipe down with a clean cloth to remove all dust and particles. Let the wood dry completely before moving to the next step.
Choose a Natural Wood Treatment
There are several effective options for natural wood treatments to protect and beautify outdoor wood projects:
Tung Oil
Tung oil is derived from the nuts of the tung tree. It provides a flexible, breathable water-repellent finish ideal for outdoor wood. Apply multiple thin coats allowing sufficient drying time between coats. It doesn’t crack or peel like varnish.
Linseed Oil
Made from flaxseed, linseed oil deeply penetrates wood fibers to protect from weathering. It must be applied in thin layers and allowed to cure in the sun for several days before recoating.
Beeswax
Rubbing beeswax into outdoor wood creates a low-luster, slightly shiny seal. It repels water while allowing the wood to breathe. Reapply annually.
Coconut Oil
Coconut oil provides antifungal and UV-protective benefits. Warm slightly to liquefy before applying liberally. Buff off excess. Coconut oil wood finish needs reapplication every 1-2 years.
Pine Tar
Derived from pine wood, pine tar is a centuries-old natural wood preservative. It has a dark finish. Apply heated pine tar and let soak deeply into the grain.
Apply the Natural Treatment
Once you’ve selected an appropriate natural oil, wax, or resin finish for your outdoor wood, it’s time to start the application process:
- Lightly sand the wood again with 220 grit sandpaper to create a smooth surface for treatment absorption.
- Wipe clean using a rag dampened with mineral spirits to remove dust. Let dry completely.
- Apply first coat according to product directions. With oils, flood the surface and allow 10-15 minutes absorption before wiping away excess.
- Allow proper drying time between coats, following the manufacturer’s recommendations. Lightly sanding between coats will improve adhesion.
- Apply additional coats until the wood has a protective sheen. Most woods require at least 3-5 thin layers.
- Allow to cure for several days before exposing to outdoor elements.
- Check annually and reapply as needed to nourish the wood. Spot treat any damaged areas.
Extra Outdoor Wood Protection Tips
In addition to proper surface treatment, the following tips will help ensure your natural wood’s longevity outdoors:
- Use stable, weather-resistant woods like cedar, cypress, oak, or teak for best results.
- Keep wood off the ground with stone, concrete, or metal bases to prevent direct ground contact.
- Shelter wood from harsh sun and precipitation whenever possible with overhangs, covers, stains, etc.
- Inspect regularly for any cracks, damage, or discoloration needing touch-up.
- Consider extra protection like marine varnish for tabletops and wooden decking.
With the proper preparation, application, and maintenance, natural wood finishes can protect and beautify your outdoor wood projects for years of enjoyment without using toxic chemicals!
Frequently Asked Questions
Here are some common questions about treating wood naturally for outdoor use:
How long do natural wood finishes last outdoors?
It depends on the product, application thickness, weathering, and wood type. Expect anywhere from 1-5 years before full reapplication is needed. Touch-ups can extend finish life.
What are food-safe options for outdoor wood?
Food-safe options include beeswax, walnut oil, olive oil, coconut oil, and mineral oil. Avoid finishes made with petroleum distillates.
Can I use linseed oil on decking and outdoor furniture?
Yes, linseed oil is great for outdoor wood protection. Apply thin coats over several days to maximize penetration and cure time.
Should I treat new or pressure-treated lumber?
Yes, new and pressure-treated wood will still benefit from additional natural treatment for protection and aesthetic appeal.
What natural finish works best for log cabins?
Pine tar is excellent for full-log structures. Tung oil is also recommended to deeply penetrate the grain while allowing the wood to breathe.
Conclusion
Treating outdoor wood with non-toxic natural oils, waxes, and resins provides beauty, protection and sustainability. With the proper preparation, application, and maintenance, your outdoor wood projects can stand the test of time and the elements. Always test products on scrap wood first and follow manufacturer’s directions. Renew treatment annually or as needed. Your wood will reward you with lasting quality when using these natural methods.