Painting outdoor wood surfaces can help protect and beautify your home. With the right prep work and painting techniques, you can achieve beautiful, long-lasting results. Here is a step-by-step guide to painting outdoor wood surfaces.
Introduction
Painting outdoor wood surfaces like fences, decks, and siding can revive weathered wood and give your home exterior a fresh new look. When done properly, a fresh coat of exterior paint also provides protection from moisture, UV rays, and pests like termites. Using high-quality exterior paint formulated for outdoor use is key, as is proper surface prep and application techniques. Follow this guide to learn how to properly prepare and paint outdoor wood to get the best looking and most durable painted finish.
Clean and Prepare the Wood Surface
Proper surface prep is crucial for a long-lasting paint job. Follow these steps to get the surface ready for painting:
Remove Existing Paint and Finish
Use a paint scraper, wire brush, or chemical stripper to remove any old, cracked or peeling paint. Sand off any remaining paint edges until you reach the bare wood. This allows the new paint to adhere properly.
Repair Damage and Cracks
Inspect the wood and use wood filler to patch any holes, cracks or areas of rot. Sand smooth once dry.
Power Wash
Power wash the wood using a pressure washer to remove dirt, mildew stains, pollen and other contaminants. Let the wood dry completely before painting.
Sand the Surface
Lightly sand to smooth any rough spots and allow the paint to adhere well. Always sand in the direction of the wood grain.
Apply Wood Primer
Use an exterior wood primer to seal the surface. Tannin-blocking primers are best for redwood or cedar. Apply with a brush or sprayer. Allow to dry completely per manufacturer’s directions.
Choose the Right Exterior Paint
Look for an exterior paint labeled for outdoor use on wood surfaces. Consider:
- Latex or oil-based: Latex dries faster but oil-based offers better protection.
- Gloss level: Satin or semi-gloss are common. Gloss shows imperfections but is most moisture-resistant.
- Color: Go for a mildew-resistant light color if the surface gets little sun. Dark colors absorb more heat.
- Quality: Invest in premium exterior paint for maximum durability and longer lasting color.
Apply the Paint
Follow these tips for getting the smoothest, longest-lasting painted finish:
Check the Weather
Paint when temperatures are between 50-90°F, avoiding rain or frost. Avoid painting in direct sunlight or on hot surfaces.
Use Proper Brushes/Rollers
Use high-quality brushes designed for exterior painting. Have various sizes for cutting in edges and larger areas. Use a roller with a 3/8” nap for smoother surfaces, or 1/2″ nap for rough surfaces.
Cut In the Edges
Use an angled trim brush to first “cut in” the edges around trim, windows, doors and corners. Paint a 2-4 inch border along all edges.
Apply the First Coat
Use a brush or roller to apply an even first coat. Work in sections and maintain a wet edge to prevent lap marks and visible brush strokes. Allow to dry per manufacturer’s instructions before second coat.
Apply the Second Coat
The second coat provides maximum protection and appearance. Apply just like the first coat. Allow proper drying time between coats. Additional coats may be needed for porous or untreated wood.
Inspect and Clean Up
Inspect the surface after drying and touch up any missed spots. Properly clean brushes and other equipment with the appropriate solvent.
Maintaining the Finish
To keep your painted wood surface looking its best:
- Allow the paint to fully cure for 30 days before washing or scrubbing.
- Clear away fallen leaves, pollen and other debris regularly to prevent staining.
- Reapply fresh paint every 2-4 years, or when you notice cracking or peeling.
Proper prep, priming and application techniques allow exterior paints to better stand up to sun, rain and other outdoor exposure. Follow these painting tips to get beautifully painted outdoor wood surfaces that add color, protection and personality to your home.
Frequently Asked Questions About Painting Outdoor Wood
How long does exterior paint last on outdoor wood?
With proper prep and application, quality exterior paint can last 2-4 years on outdoor wood surfaces before needing fresh coats. Harsher weather, direct sun and lack of maintenance can shorten the lifespan.
What kind of paint should be used on exterior wood?
High quality 100% acrylic latex paints formulated for exterior use on wood provide the best performance and longevity. Oil-based alkyd paints also perform well but have stronger odor and take longer to dry.
Should primer be used when painting outdoor wood?
Yes, priming before painting is highly recommended for wood outdoors. The primer seals the surface and provides extra protection from moisture and sun.
What are some common mistakes when painting outdoor wood?
Rushing prep work, using low-quality paint, applying in direct sun or hot temperatures, and improper coating thickness can all cause the paint to fail prematurely on exterior wood.
Should exterior wood be sanded before painting?
Lightly sanding provides the ideal surface for paint adhesion. Always sand in the direction of the wood grain. Remove dust before priming and painting.
How many coats of paint are needed on outdoor wood?
Most quality exterior paints provide maximum protection and hide in 2 coats. Porous new wood or dramatic color changes may require an additional coat. Always follow the manufacturer’s recommendations.
What sheen of exterior paint works best for outdoor wood?
Satin and semi-gloss sheens provide the best durability and moisture resistance. High gloss shows imperfections but resists moisture best. Matte finishes hide flaws but require more frequent repainting.
Is it okay to paint over stained or sealed outdoor wood?
Yes, for best adhesion remove any failing or peeling finish and properly prepare the bare wood. Lightly sanding also provides texture for the new paint to grip.
Should you paint outdoor wood vertical or horizontal?
Painting boards horizontally (across the grain) creates a smoother painted surface because there is less uneven absorption into the wood grain.
Conclusion
Painting outdoor wood surfaces like fences, siding and decks is a project any homeowner can tackle with proper planning and technique. While it does require some elbow grease for surface preparation, the results are well worth it. A fresh coat of specially formulated exterior paint provides moisture protection, prevents rot and insect damage, and gives an instant facelift to weathered wood. Just be sure to choose a dry day and allow adequate drying time between coats. Follow the tips outlined here for best practices on how to prep, prime and paint your outdoor wood surfaces to get a durable and beautiful finish that will last.