Yes, you can paint treated pine wood. It is a common practice to protect and enhance the appearance of structures built with treated pine, such as decks, fences, and outdoor furniture.
Why Weathering Treated Pine Before Painting Is Recommended
While you can paint treated pine, achieving the best results often involves some preparation and timing. According to expert advice:
- Waiting for the Treated Pine to Weather: This is considered the most effective approach. The weathering process allows the wood to go through its initial period of cracking, warping, and general movement. Once this natural settling occurs, the wood surface is more stable and ready to accept paint.
- Improved Paint Adhesion: Weathered surfaces often hold paint better after proper cleaning and preparation, as the initial chemical treatment residues may be less prominent on the surface.
Steps to Painting Treated Pine Effectively
To ensure your paint job on treated pine lasts and looks good, consider these general steps after the wood has had time to weather:
- Ensure the Wood is Dry: Treated pine contains moisture from the treatment process. Painting wet wood can lead to peeling and poor adhesion. Allow sufficient drying time – often several weeks or even months, depending on climate and specific treatment.
- Clean the Surface: Remove any dirt, mildew, or residual treatment salts. A wood cleaner designed for treated timber or a simple solution of mild detergent and water can be used. Rinse thoroughly and let it dry completely.
- Sand Lightly (Optional but Recommended): A light sanding can help smooth any raised grain and improve paint adhesion.
- Apply a Suitable Primer: Use a high-quality primer specifically designed for treated wood. This step is crucial as it helps block potential bleed-through from the treatment chemicals and provides a uniform surface for the paint.
- Apply High-Quality Paint: Use exterior-grade acrylic latex paint. These paints are flexible, durable, and resistant to mildew, making them ideal for outdoor wood applications. Apply at least two thin coats for best coverage and protection.
Key Considerations
- Moisture Content: Always check the moisture content of the wood before painting. There are tools available for this, or you can use a simple test (like sprinkling water – it should soak in, not bead up, for it to be ready for paint).
- Type of Primer: Using the correct primer is vital for preventing issues like tannin bleed or poor adhesion commonly associated with painting treated woods.
- Weather Conditions: Paint on dry, calm days with temperatures within the paint manufacturer's recommended range.
By following these steps and allowing the treated pine to weather as suggested, you can achieve a durable and attractive painted finish.
