Can You Paint a Cedar Exterior?

Weathering

• Although cedar wood can accept paint, waiting to apply the paint can have negative consequences. As cedar ages, its exposure to the elements compromises its ability to hold paint. Ideally and for the best results, cedar siding should not weather any more than a few weeks before you apply the paint. The longer you allow harsh sunlight and water to affect the cedar, the more the likelihood of a poor result increases, advises the Western Red Cedar Lumber Association.

Preparation

• Preparing the cedar for accepting the paint helps ensure the success of the application. Remove any old paint on the siding that shows signs of blistering or peeling. Any film that forms a finish on the cedar creates a coating on the wood rather than penetrates it; this needs to be removed if you plan to apply a stain or water repellent prior to painting. Clean a penetrating stain on the cedar with a bristle brush before applying any paint.

Primer and Paint

• Once you have properly prepared the surface, apply a primer . Cedar contains certain substances that might interfere with latex paint, making priming the wood essential. Use a primer made specifically for cedar wood. Latex paint gives better results than oil-based paint, as it adapts to changes the wood undergoes over time more easily than other paints. A properly applied paint job can last from 10 to 12 years on a cedar exterior.

Tips

• Applying a water-repelling preservative before applying any paint helps to extend the time until repainting becomes necessary. Apply only one coat, and let it dry thoroughly before applying the primer. Check the label on the water repellent for the drying time. Apply the paint over the primer. Wait for the first coat to dry completely if you plan to add a second coat. Allow for more time for the first coat to dry before applying the second if you're working in rainy weather.