How to Prepare, Cut In, and Roll Paint on Interior Walls

Painting walls is one of the most effective ways to refresh a room—but it takes more than just picking a colour and diving in. The secret to smooth, professional-looking results? Good prep, sharp edging, and consistent rolling.

Here’s a step-by-step guide to help you do it right the first time.

What You’ll Need:

• Painter’s tape
• Drop cloths or plastic sheets
• Spackling compound and putty knife
• Sandpaper (120–220 grit)
• Angled sash brush (2–2.5”)
• Paint roller and extension pole
• Paint tray and liners
• Microfibre cloth or tack cloth
• Your chosen interior paint

Step 1:

Prep the Walls

Start by clearing the room or moving furniture to the centre and covering it. Lay drop cloths down to protect the floor.

• Fill small holes or dents with spackle. Let dry, then sand smooth.
• Sand glossy or rough areas to create a uniform surface.
• Wipe walls with a damp cloth or tack cloth to remove dust.
• Use painter’s tape to protect baseboards, trim, and ceilings.

Tip: Don’t skip cleaning or dusting—the smoother the surface, the smoother your paint job will look.

Step 2:

Cut In Along Edges

“Cutting in” means painting a border—about 2 to 3 inches wide—around the edges of the wall where a roller can’t reach. Use an angled brush and a steady hand.

Start with:

• Along the ceiling and baseboards
• Around door frames and window trim
• Inside corners and tight spaces

Tip: Feather the edge slightly into the wall with your brush so your roller can blend over it seamlessly.

Step 3:

Roll the Paint

Pour your paint into a tray and load the roller evenly by rolling into the paint and rolling over the liner. Roll off excess on the tray’s ridged area.

To spread the paint evenly:

1. Start at the top of the wall and use a “W” or “M” pattern and roll a 3’ x 3’ section  to spread the paint.
2. Load the roller again with paint.  Paint the bottom section next using the “W” or “M” pattern.
3. Load the roller one more time going from the very top of the wall to the very bottom spreading the paint out evenly.
4. Work in sections while the paint is still wet to avoid lap marks.

Always roll in the same general direction for consistency, and don’t overwork the paint.

Step 4:

Let It Dry and Repeat

Most walls will need two coats, especially if you’re changing colours or painting over a darker surface. Allow the first coat to dry fully (usually a few hours) before applying the second. Make sure you have the energy needed before starting the second coat.

Bonus Tip:

If you take a break, wrap your roller and brush in plastic wrap or a sealed bag to keep them from drying out.

We’ll Help You Get Rolling

From brushes and rollers to interior paint and prep tools, Autohome has everything you need for a job well done. Bring in your room dimensions or project questions—we’ll help you choose the right supplies and make sure nothing gets missed.