Painting is the fastest and most affordable way to transform a room. With good preparation and the right technique, your DIY interior paint job can look just as crisp as a professional’s.
Step 1: Calculate how much paint you need
Measure the room and use our free DIY paint calculator to estimate the square footage and gallons required. Most interior paints cover roughly 350–400 square feet per gallon, and two coats are standard for an even color.
Step 2: Gather tools and materials
- Quality interior paint and primer (for patched areas or big color changes)
- 2½-inch angled sash brush for cutting in
- 9-inch roller frame, ⅜-inch nap cover for smooth walls, extension pole and tray
- Painter’s tape, drop cloths, spackle and a sanding sponge
Step 3: Prepare the room
Move furniture to the center and cover it. Remove outlet covers and switch plates. Fill nail holes, patch any drywall damage, sand smooth and wipe walls with a damp cloth. Good prep is 80% of a great paint job.
Step 4: Tape and prime
Apply painter’s tape along trim and ceilings, pressing the edge down firmly. Spot-prime patched areas; use a full coat of primer if you’re painting over a dark color or glossy finish.
Step 5: Cut in the edges
Using the angled brush, paint a 2–3-inch band along the ceiling, corners and trim. Work one wall at a time so the cut-in paint is still wet when you roll. This helps prevent visible “picture framing.”
Step 6: Roll the walls
Load the roller evenly, then roll in a large “W” pattern about 3 feet wide. Fill in without lifting the roller and finish with light, straight top-to-bottom strokes. Always keep a wet edge and overlap slightly into the previous section.
Step 7: Apply the second coat
Let the first coat dry according to the label (usually 2–4 hours), then repeat cutting in and rolling. Remove the tape while the final coat is still slightly tacky, pulling it back at a 45° angle for the cleanest line.
Ventilation matters: Open windows and use a fan to keep fresh air moving. Choose low-VOC paint for bedrooms and nurseries.
Choosing the Right Paint Finish
Sheen makes a big difference in how a room looks and holds up.
- Flat or matte: Hides wall flaws well. Best for ceilings and low-traffic rooms.
- Eggshell: A soft glow that’s easier to wipe clean. Great for living rooms and bedrooms.
- Satin: More durable and washable. Good for kitchens, kids’ rooms and hallways.
- Semi-gloss: Tough and easy to clean. Use it on trim, doors and cabinets.
Should You Paint the Ceiling or Walls First?
Always start at the top. Paint the ceiling first, then the walls, and finish with trim and doors. Drips fall downward, so working top to bottom means you never paint over a finished surface.
Common Painting Mistakes
- Skipping primer on patched spots, which leaves shiny “flashing” marks
- Overloading the roller, which causes drips and thick edges
- Painting in direct sunlight or a very cold room
- Rushing the second coat before the first has dried
If you’re painting after taking down old paper, read how to remove wallpaper first so the walls are properly prepped.
Clean-up tips
Wash latex paint from brushes and rollers with warm, soapy water. Store leftover paint tightly sealed and labeled with the room name. It’s perfect for future touch-ups.
Want a bigger transformation? See how to install laminate flooring next.
In the kitchen, a peel and stick backsplash pairs nicely with fresh paint and takes only an afternoon.
Planning a bigger makeover? Our guide to DIY home renovation on a budget shows where to save and where to spend.
