How to Paint Baseboards

Painting baseboard supplies

The Spruce

Overview
  • Working Time: 3 hrs
  • Total Time: 24 hrs
  • Yield: One 10 x 10 room
  • Skill Level: Intermediate
  • Estimated Cost: $15 to $30

Painting interior trim such as window or door casing and crown molding nearly always guarantees that your room will look fresher and neater. The same idea holds true for baseboards. Painting your baseboards is one of the best cosmetic improvements you can make in a room, and it only takes a day or two. Painted baseboards will help the space sparkle like nothing else.

While you can use either latex or oil-based paint for baseboards, latex (water-based) paints are much easier to clean up. You can choose from several different gloss levels for either latex or oil-based paints, but a slightly glossy finish is generally recommended for baseboards since it is more resistant to scuffing and is more washable than a flat-finish paint. A semi-gloss or high-gloss paint is usually the best choice for baseboards.

What You'll Need

Equipment / Tools

  • Drop cloth
  • Eye protection and gloves
  • Bucket
  • Sponge
  • Putty knife
  • 1- or 2-inch sash brush

Materials

  • Trisodium phosphate (TSP)
  • Painter's tape
  • Masking film (as needed)
  • Wood putty
  • Fine-grit sandpaper or sanding sponge
  • Primer
  • Semi-gloss or high-gloss latex paint

Instructions

  1. Decide Whether to Remove the Baseboards

    Painting baseboards in place, while they are still attached to the walls, comes with a number of related tasks: taping, masking, application of a drop cloth, and very careful painting to avoid getting paint on the wall. Most people paint baseboards with them in place on the walls, but in some instances, it makes more sense to remove the baseboards so that you can paint them in a separate location.

    • With new homes or homes that have not been extensively remodeled over the years, removal can be as easy as prying the baseboards off with a thin pry bar and your fingers. In fact, companies that sand wood flooring usually will remove and replace baseboards as a matter of course. In many cases, it's an easy job and it leads to a much better looking end result.
    • If the baseboards have not yet been installed, you should always paint the baseboards before installation. Minor damage to the paint finish will occur during installation, but this is expected. With most of the painting already done, you'll only need to do a small amount of touch-up after installing the baseboards.

    However, with older homes that have many layers of paint covering the wall-to-baseboard joint, removing the baseboards may cause damage to the wall that is difficult to repair. The baseboard paint will rip upward, taking with it wall paint and possibly drywall paper or plaster. If you do choose to remove old baseboards, scoring along the seams with a utility knife can reduce damage as you pry the baseboards free.

  2. Clean Previously Painted Baseboards

    Nowhere is it more critical to clean the surfaces prior to painting than with previously painted baseboards (open-pore wood baseboards should not be cleaned with water). Dirt and grime collect at the bottom of walls, making this one of the dirtiest parts of the home.

    Spread a drop cloth over the floor to protect the flooring. Mix a solution of trisodium phosphate (TSP) with water in a bucket, according to product instructions. Wipe down the baseboards with the solution and a sponge. Be sure to clean the top of the baseboards in particular, as dust naturally collects on horizontal surfaces.

    TSP is strong chemical cleaner that cleans a variety of surfaces and acts as a deglosser. Because it lightly etches materials, it can damage glass and mirrors, and it can darken aluminum. It can also dull shiny floor finishes. TSP is toxic and can burn skin and eyes. Always wear eye protection, gloves, and long sleeves when working with TSP.

  3. Patch Gouges and Nail Depressions

    Before you pull out the paint, patch and fill those big dings and holes that developed over time, using wood filler applied with a putty knife. Large nail depressions should be filled, while tiny, pinpoint depressions can be left unfilled. If a brad nailer was used and the sink depth was perfectly calibrated, you may find it easier just to paint over those tiny divots. But if the baseboards were nailed by hand with finish nails, you should fill those holes with wood filler.

  4. Lightly Sand

    If you did significant patching with wood putty or filler, or if the baseboards are old, smooth them with fine-grit sandpaper before priming. Hand-sanding with a piece of sandpaper is usually fine, or you can use a flexible sanding sponge.

    Sanding is more necessary with old baseboards that may already have several coats of paint.

  5. Mask the Walls and Floor

    Use low-stick painter's tape to mask the lower edge of the wall, right above the baseboards, as well as the junction between the floor and the baseboards. Even though masking is time-consuming, it will result in a faster and cleaner paint job. If you are a careful painter, a simple line of painter's tape covering the wall along the baseboard may offer all the protection you need. Masking does not guarantee perfect results, though; you still need to be careful when applying the paint, because excessive slop on the flooring-side masking tape will make it difficult to remove the tape after the paint dries.

    For added protection in that baseboard-to-wall area, you can use masking film to ensure that the baseboard paint does not splatter on the wall. Run the masking tape edge of the film along the wall-to-baseboards junction, then spread the film upward. The film will stick to the wall on its own due to static electricity.

    Some painters prefer to "freehand" when painting baseboards—painting without the benefit of masking. The cut-in painting technique (painting without masking off surfaces) is difficult enough on accessible door and window trim, but far more difficult on baseboards because of their location. It is very easy to mask off baseboards because of that flat horizontal wall surface.

    Applying painters tape to baseboard
    The Spruce
  6. Prime the Baseboards

    Baseboards that do not have factory-applied primer and have a raw wood surface should always be primed before painting. Previously primed or painted baseboards can also benefit from a primer coat, but this is not always necessary if the cleaned surface is in good condition.

    Mix the primer thoroughly. Load the brush with primer and apply it to the baseboards with horizontal strokes. Avoid overloading the brush, as this can create drips and runs.

    The best painting technique is to hold the brush between thumb and forefinger, as you would a pen, and draw the brush horizontally with the tips of the bristles slightly depressed against the baseboard. Load the brush with paint to about one-third of the bristle length. Long, slow strokes of the brushwork best. As you progress along the baseboard, try to "keep a wet edge"—painting back over the edges of previously painted areas before the paint dries. This helps prevent lap marks.

    Let the primer dry as directed by the manufacturer.

  7. Paint the Baseboards

    If your can of paint has been sitting for more than a few days, you may want to take it to the paint store to have it freshly shaken. Or, stir it thoroughly after opening the can. Set the can lid well away from the work area.

    As with priming, be very economical about loading the brush with paint—dip the brush to no more than one-third the length of the bristles. For the first coat, use less paint than you think you may need. Draw the paintbrush in long strokes along the length of the baseboards. As you overlap the strokes, try to keep a wet edge to prevent lap marks.

    Between coats, keep your paintbrush from drying out by wrapping it in plastic food wrap and/or an old plastic bag and sealing around the metal band of the brush with a rubber band. Store the brush in the refrigerator or other cool, dark place until you're ready for the next coat.

    After the first coat, let the baseboards dry for at least one full day. After the paint has cured, apply a second coat. With high-gloss paints, some painters like to lightly scuff the painted surface with fine sandpaper before applying the second coat. This gives the glossy surface some "tooth" that helps the second coat adhere.

    Wait for the paint to dry as directed, then remove the painter's tape.

    Painting baseboard
    The Spruce 
  8. Clean Your Tools

    Use soap and water to thoroughly clean your brush and any other painting tools or containers you will keep. A quality brush can last for years with proper care.