Roller marks or stipple is the unintentional textured pattern that’s left in the paint by the roller.
This can occur when:
The incorrect roller cover is used
Lower quality paints and/or rollers are used
The incorrect rolling technique is applied
Use the prescribed roller cover and avoid too long a nap for the paint and the substrate. Use quality rollers to ensure the recommended film thickness and uniformity. High quality paints also tend to roll on more evenly due to their higher solids content and levelling properties. Another great tip is to use water to pre-dampen roller covers to be used with water-based paint. Be sure to shake out excess water before painting and 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 paint spatter. Then, without lifting the roller from the surface, fill in the zigzag pattern with even, parallel strokes.
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