Painting a Room Right: The Prep That Actually Matters
Bad paint jobs are almost never a paint problem. They're a prep problem. Two people can use the exact same $40 gallon of paint and get completely different results depending on what happened in the thirty minutes before the roller came out. Here's the prep that actually changes the outcome, and the steps that are safe to skip on a normal bedroom or living room repaint.
Fill and sand before you tape
Nail holes, small dents, and hairline cracks should get spackle first, sanded smooth once dry, then wiped down. Taping before this step means you're taping over dust, which shows up as a slightly rough line under the new paint.
Tape isn't optional, but technique is what matters
The trick that actually prevents bleed-through isn't the tape brand, it's pressing the edge down firmly with a putty knife or old credit card after applying it. A loosely applied edge is what lets paint creep underneath, not a cheap roll of tape.
One good primer coat beats two extra paint coats
If you're painting over a dark color, a patched wall, or bare drywall, a tinted primer coat first means your actual paint color goes on true and even in two coats instead of three or four. Skipping primer to "save a step" usually costs more time overall.
Cut in before you roll, not after
Cutting in — painting the edges and corners with a brush — should happen right before you roll that same wall's main area, while the cut-in paint is still wet. Cutting in an entire room first and rolling afterward creates a visible line where the brushed and rolled paint dried at different times.
Ventilation and drying time aren't just for smell
Rushing a second coat onto paint that hasn't fully dried is one of the most common causes of a streaky, uneven finish. Check the can's recoat time and treat it as a minimum, not a suggestion — especially in a room with limited airflow.
What you actually need to buy
- Spackle and a small putty knife for hole and crack repair
- Fine-grit sanding sponge
- Painter's tape (a mid-range option is fine — technique matters more than price here)
- A tinted primer if covering a dark color or patched drywall
- A quality angled brush for cutting in — this is worth spending more on
- A roller with the nap thickness matched to your wall texture (smooth walls: thinner nap)
Budget: for a standard 10x12 room including primer, paint, and supplies, expect $80–$150 depending on paint quality.