How to Paint House Doors
Doors between rooms are either completely flat surfaces or they have one or more raised-panel. Modern doors with faux panels pressed into the MDF and old doors with multiple panels built in, can be hard to paint without leaving brush and drag marks in the finish. These marks occur when the brush touches partially dry paint as you try to blend the different parts of the door together. Use the techniques on this page to get a smooth paint finish on both flat and raised-panel doors.
Anatomy of a Raised-Panel Door
The parts of a raised-panel door are pictured here and include the rails, stiles, and panels. The door rails are the cross members, including the top and bottom as well as the cross pieces dividing the middle.
The stiles are the pieces that run vertically and include the small pieces between the panels and the two long pieces on the sides. The side stiles run from the top to the bottom of the door to tie the rails, center stiles, and panels together.
The panels are the inset squares or rectangles. In old doors, the panels are separate pieces of wood that fit into a groove cut along the edge of the rails and stiles. These door panels are designed to float in the frame as the wood expands and contracts with the moisture and temperature changes in the surrounding atmosphere.
Over time, movement in a door panel can cause the paint film to crack around the border. Many people make the mistake of caulking these cracks to hide them. The problem with caulking around a raised panel is it only creates a more unsightly caulk cracking problem. The best way to deal with cracking paint around a raised panel is to fill it with more paint, not caulk. If you have cracking caulk around the panels in your raised-panel door, you should scrape it off completely, sand it to smooth wood, and then repaint the door giving extra attention to the panel borders to fill them well with paint.
Preparation to Paint a Door
Remove the door handle to make sanding and painting easier. Prep a previously painted door by sanding with 120 sandpaper. Start at the top and sand each segment of the door. If you're repainting over latex paint, sand very lightly. Being too rough with the surface will cause the paint to curl up, not sand off. You just want to lightly scuff up the surface of latex paint to prepare it for a new coat.
If the door is bare wood, sand it well with 220 sandpaper and apply two coats of primer. For a durable finish that will last, under coat with an oil-based product, instead of latex, and let it dry for 12 to 24 hours between coats. If your new paint color will be much darker than it is now or you're painting bare wood, tint the under coat primer to more closely match the final color before applying it. Before finish painting, lightly sand the dry primer and use a vacuum or tack cloth to remove all the sanding dust.
Brush and/or vacuum the dust off the door. Use a tack cloth in combination with a vacuum cleaner to thoroughly remove dust from the surface for the best finish. This is a particularly good idea if you're using an oil, alkyd or high-gloss finish paint because these will show any remnants of dust in the finish.
Doors and windows in a house are usually done with an enamel paint finish. Enamels are available in both latex and oil-based formulas and come in shiny finishes like semi-gloss and high-gloss. Because it dries to a hard, durable finish, enamel paint provides lasting protection for door surfaces that tend to see a lot of wear and tear. And because it is so durable, enamel can be washed to remove marks and dirt to maintain the shine and beauty of the paint finish.
Painting a Raised-Panel Door
Start at the top when painting raised-panel doors and paint all of each part before moving to the next part. Paint all the panels first, then paint the inner rails and small inner stiles. Next, paint the top and bottom rails and finish by painting the door edge and the long outer stiles. Work quickly to finish each part so the paint doesn't dry before you can do the adjoining parts.
If you're only painting one side of a door, paint the edge that shows from that side when the door is open. For example, if you're painting the outside of a door that opens into a room, paint the edge where the hinges show when the door is open. Conversely, if you're painting the inside of the door, paint the edge where the latch plunger is visible when the door is open.
Painting the Panels
Starting at the top of the door and paint the raised panels. Push the paint into the corners and cracks around the panel border letting it overlap a bit onto the surrounding rails, stiles and the center of the panel itself. Brush the paint out along all four sides to smooth it and remove any excess that pools along the bottom edge.
Next, paint the center of the panel applying the paint with back and forth horizontal strokes to cover it completely with a thick coat. Then stroke vertically up and down the panel with a semi-dry brush to smooth out the coat and remove the excess paint. Finish by brushing along all four side of the border again a few times with a semi-dry brush to smooth and pick up any remaining excess paint. Runs will develop at the corners of the panels if all the excess paint is not removed.
Painting the Rails and Stiles
With the panels done, go back to the top and start painting the short, center stiles and inner rails between the panels. Blend these two parts together by painting the short stile first with vertical strokes letting the paint overlap the rails a bit. Next paint the inner rails with horizontal strokes letting the paint overlap the side stiles a bit.
As you paint these inner parts, smooth out the lap marks from the adjacent parts. On the inner stiles, smooth out the lap marks from the panels. On the inner rails, smooth out the lap marks from the panels and the short stiles.
Move down the door painting these interior pieces until all the inner rails and small inner stiles are done. Next paint the top and bottom rails letting the paint overlap onto the side stiles a bit. Finish by returning to the top to paint the edge of the door and down the two side stiles. Smooth all the lap marks from the rails, panels and edge with the vertical strokes along the outer stiles.
Painting Flat Doors
Flat, hollow-core doors are commonly found in newer houses and can be made of wood or plastic. It's very easy to paint these types of doors with consistent profession looking results because they are entirely flat. The simple secret is to remove the door handle and then use a brush to paint the edges and a roller to paint the remainder.
After sanding and priming as required, use a brush to paint along the bottom, top and edge. Immediately follow with a roller to blend the body of the door with all the brush work in one consistently smooth finish.