What roller thickness should I use for painting?

Choosing the right roller thickness (also called nap) is one of the most important steps in achieving a smooth, professional-looking finish. The nap determines how much paint the roller holds and how well it can reach into the surface texture. Using the correct thickness ensures better coverage, fewer streaks, and a more uniform final result.

Summary

For most interior painting projects, a 10 mm (3/8") microfiber roller is the best all-around choice. Use thinner naps for smooth surfaces like cabinets and thicker naps for textured or rough surfaces to ensure proper coverage.

Detailed Guide

Very Smooth Surfaces (Cabinets, Doors, Trim)

6 mm (1/4") nap
Ideal for ultra-smooth finishes where minimal texture is critical. This nap applies a thin, even coat and helps reduce roller marks.

Recommended with premium finishes like Benjamin Moore ADVANCE or Scuff-X for a smooth, furniture-like result on cabinets and trim.

Smooth Walls (Most Interior Walls)

10 mm (3/8") nap
The most commonly used roller for standard drywall. It provides excellent balance between paint pickup and smooth application.

Works perfectly with products like Benjamin Moore Regal Select, AURA, or Ben Interior Paint in eggshell or satin finishes.

Lightly Textured Surfaces

13 mm (1/2") nap
Designed to hold more paint and reach into slight textures without leaving dry spots.

A great choice when using Ultra Spec 500 or Regal Select on walls with minor imperfections or orange-peel texture.

Rough Surfaces (Stucco, Brick, Heavy Texture)

19 mm (3/4") nap
Holds significantly more paint and allows proper coverage over uneven surfaces.

Ideal for exterior coatings such as Benjamin Moore Element Guard or Ultra Spec EXT.

Very Rough Surfaces (Masonry, Deep Texture)

25 mm (1") nap
Best for extremely rough or porous surfaces where maximum paint loading is required.

Commonly used for block walls, concrete, or heavily textured exteriors.

Quick Reference

• 6–10 mm: Smooth surfaces and fine finish work
• 13 mm: General wall applications
• 19–25 mm: Rough and exterior surfaces

Pro Tip

Microfiber rollers are highly recommended for most projects as they provide better paint pickup, smoother application, and less splatter compared to standard rollers. Pairing the right nap with high-quality paints like Benjamin Moore AURA or Regal Select will significantly improve both coverage and finish.