How to Paint a Sloped Room

Remove the electrical and switch plates and repair any damage to the walls. Sand the walls with a 120-grit sandpaper. Start with the ceiling and work your way down the walls, including the sloped wall. Follow up with a fine-grit sandpaper. Vacuum then clean the ceiling, walls and woodwork with warm, soapy water. Pay careful attention to corners and along the trim where dust and dirt often accumulates.

Protect the floors and furniture with plastic, sheets or newspapers. Place a piece of painter’s tape over top of outlets and switches.

Cut in along the edges of the ceiling with a high-quality paintbrush. Fill in the ceiling with a roller attached to a painter‘s pole. Start painting on one side of the room and paint in rows, overlapping them as you go to provide complete coverage. Apply a second coat after the paint’s surface dries.

Cut in along the edges, corners, and around outlets and switches on the walls. If a wall slopes all the way to the floor, cut in a bit higher than normal until it reaches an area where you comfortably can use a roller at that angle. You may have to lie on the floor to adequately reach the lower part, but this varies depending on the severity of the angle.

Roll the center of the walls with a roller, making large "W" strokes, overlapping as you go to fill in the entire space. Start at the top of the wall and work your way to the floor; for sloped walls, start at the bottom and work your way up because you may scuff the paint on the top parts as you try to reach the bottom sections. Apply a second coat after the first coat dries.

Paint the trim after the ceiling and walls are done with a high-quality paintbrush. For the trim along the bottom of the sloped walls, you may have to lie down to paint.