How to Paint a Room (Step by Step)

A fresh coat of paint is the highest-return upgrade in the house — but a rushed job shows every skipped step. Bad prep means peeling edges, roller marks and tape bleed that no amount of good paint can hide, and you’ll be repainting in a year. Do it right once and the room looks sharp for a decade.

What you’ll need

• Interior wall paint — a quality latex like Benjamin Moore Regal, Valspar or a good store brand; one gallon covers roughly 350–400 sq ft per coat
• Primer — for bare drywall, patches, stains, or a big color change (Kilz for stains and odors)
• Angled sash brush — a 2.5″ angled brush for cutting in clean edges
• Roller frame, covers & a tray — a 3/8″ nap cover for most walls, 1/2″ for texture
• Painter’s tape — blue or green low-tack tape for trim, ceilings and outlets
• Drop cloths — canvas for floors, plastic for furniture
• Spackle or joint compound — to fill nail holes and dings
• Putty knife & scraper — for filling holes and knocking down old flaking paint
• Sanding sponge or sandpaper — 120–150 grit to smooth patches and dull glossy walls
• A 5-gallon pail with a grid — faster and cleaner than a tray for whole-room rolling
• A step ladder — for cutting in at the ceiling line safely
• Safety glasses and a mask — for sanding dust; plus disposable gloves

Step 1: Clear and protect the room

Move small furniture out and pull the rest to the center, then cover it with plastic. Take down curtains, switch plates and outlet covers — painting around them looks amateur. Lay canvas drop cloths along the walls; canvas stays put and won’t get slick underfoot the way plastic does. Wipe the walls down with a damp sponge to lift dust, cobwebs and kitchen grease so the paint bonds.

Pro tip: Loosen each outlet and switch cover but leave the electrical device in place, then push the plastic screws back into their holes so you don’t lose them. You do not need to shut off power to remove cover plates — but if you’re replacing devices while you’re in there, turn the breaker off first.

Step 2: Patch, sand and clean

Fill nail holes and dents with spackle using a putty knife, letting it dry and adding a second pass if it shrinks in. For anything bigger than a quarter, see our drywall guide below. Once dry, sand the patches flush with a 120–150 grit sanding sponge, and scuff any glossy or previously enameled walls so the new paint grips. Vacuum, then wipe with a damp cloth — paint over dust and it peels.

Step 3: Tape and prime

Run painter’s tape along baseboards, door casings and the ceiling line if you have a steady-enough hand to skip cutting in there. Press the edge down hard with a putty knife so paint can’t creep under. Spot-prime every patch, any bare drywall, and water or smoke stains with a stain-blocking primer. If you’re making a dramatic color change — dark to light especially — prime the whole wall; it saves you a third finish coat.

Common mistake: Leaving tape on too long. Pull it while the final coat is still slightly tacky, or wait until fully cured — but never peel dried, half-cured paint, or it lifts in a ragged line. Pull slowly at a 45-degree angle back over itself.

Step 4: Cut in the edges

“Cutting in” is brushing a 2–3 inch band of paint where the roller can’t reach — corners, around trim, and along the ceiling. Load a 2.5″ angled sash brush about a third of the way and tap off the excess. Work in three-foot sections and cut in one wall at a time right before you roll it, so the brushed and rolled paint blend while both are wet (this avoids “hat-banding,” a visible frame around the wall).

Step 5: Roll on the first coat

Pour paint into a grid-lined pail or tray and load the roller evenly. Roll a large loose “W” or “M” about a yard wide, then fill it in without lifting the roller off the wall, working top to bottom. Keep a wet edge — always roll back into the section you just did — and finish each area with light, single top-to-bottom passes to even out the texture. Two thin coats always beat one thick one, which sags and shows lines.

Step 6: Second coat, then reveal

Let the first coat dry per the can — usually 2–4 hours — then repeat the cut-in-and-roll for coat two. When it’s dry to the touch, pull your tape, reinstall the switch and outlet covers, and inspect in raking light for thin spots. Wash brushes and roller covers immediately in warm soapy water (latex) so they last for the next project.

Frequently asked questions

Painting a room is the rare project where careful prep does more than expensive paint — take your time on the patching and cutting in and even a beginner gets pro results. Need color-matching advice or a specific primer today? Your local independent hardware store can point you to the right product, and you can always ask us here.