Roller Marks or Stipple

Unintentional textured pattern left in the paint by the roller.

Possible Cause

• Use of incorrect roller cover.
• Use of lower grades of paint.
• Use of a low quality roller.
• Use of incorrect rolling technique.

Solution

Use the proper roller cover; avoid too long a nap for the paint and substrate. Use quality rollers to ensure adequate film thickness and uniformity. High quality paints tend to roll on more evenly due to their higher solids content and leveling properties. Use water to pre-dampen roller covers to be used with water-based paint; shake out excess water. Don't let paint build up at roller ends. Begin rolling at a corner near the ceiling and work down the wall in three foot square sections. Spread the paint in a zigzag "M" or "W" pattern, beginning with an upward stroke to minimise splatter; then, without lifting the roller from the surface, fill in the zigzag pattern with even, parallel strokes.

Images courtesy of the Paint Quality Institute from Dow Coating Materials