Step #3: Understand Nap Thickness ⅜” - ½” (9.5-12.7mm)—For smooth and semi-smooth surfaces like drywall, painted or unpainted walls and ceilings. ¾” - 1” (19.05-25.4mm)—For semi-rough surfaces like wood, stucco or a textured ceiling. 1 ¼” - 1 ½” (31.75-38.1mm)—For rough surfaces like concrete block, brick, or masonry.
Roller cover nap sizes, or thickness of the fibers, varies from low to high based on the surface you are painting. Low-nap rollers pick up less paint, while high-nap rollers pick up and hold more for larger projects.
Short Naps or 5mm-8mm : These don't hold as much paint as the others, but are the best kind to use with a glossy paint as they leave a thin and very smooth coating. Great to use on smooth and semi-smooth surfaces. Regular Naps of 10mm-12mm : Will hold most types of paint very well and leaves a soft stippled effect.
Ceilings and Drywall - Medium 3/8″ roller covers work best. Walls, Wood, and Metal - Small 1/4″ roller covers or foam rollers will produce the smoothest finish. Light to Medium Textured Surfaces - Microfiber rollers are best.
Rough surfaces require a higher nap (3/4” to 1 ½”) so the long fibers can reach into the valleys of the texture. Higher nap heights are great for textured plaster or stucco, siding, decks, concrete block, brick, and corrugated metal.
For those looking for paint rollers for a smooth finish, high-density foam rollers should be your first stop. While high-density foam rollers are great, they are not the only option. Lint-free short nap rollers are another excellent choice for achieving a smooth finish.
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Quality 12mm nap rollers will apply an even paint film to your walls and ceilings and give you a great finish, without splattering paint all over you and the floor. Professional painters actually use 20mm nap rollers on ceilings, and 12mm nap rollers on walls.
A nap size of 3/8 to 1/2 inch is preferred for most ceilings and walls, acoustic tile, paneling, smooth concrete, textured drywall, and wood.
⅜” - ½” (9.5-12.7mm)—For smooth and semi-smooth surfaces like drywall, painted or unpainted walls and ceilings.
When babies sleep for 45 minutes or less and wake up after just 1 sleep cycle this is considered a short nap. Long naps range from 1.5 - 3 hours and occur when babies successfully transition from the first sleep cycle to the next.
Generally speaking, 6-8mm nap covers are used for gloss and semi gloss paints, 10-12mm nap covers for low sheen and flat paints on walls and 20-32mm nap covers for most paints on rough surfaces such as concrete or textured walls.
Short Nap (5mm or less)
They are designed to hold a small amount of paint to provide an ultra-smooth finish, especially for water and oil-based gloss and semi-gloss paints.
The thinner the roller nap, the smoother the finish will be. A 3/8″ roller nap is ideal for most interior walls, metal, and smooth surfaces. A 1/2″ roller nap is excellent for drywall interior walls and ceilings. A 3/4″ roller nap is best for exterior walls and popcorn ceilings.
Microfibre roller sleeves work great for interior doors because they have the flexibility to adjust to different surface textures and materials you're painting. Whether your door is made of timber or laminate, a microfibre roller sleeve can provide the best paint release in any situation for a great finish.
If the surface is lightly textured, use a 3/8-inch nap. If the surface is moderately textured, painted concrete or brick, or paneling, use a 1/2-inch nap. If the surfaces are heavily textured, such as popcorn-textured walls, concrete, or bare brick, use a 3/4-inch nap.
Two common types of paint rollers are foam rollers and nap rollers. Nap rollers consists of a large number of strands and fibers. Foam rollers are a more affordable option to traditional rollers and highly useful for many types of painting jobs. Foam is a material that absorbs liquids very easily.
painting paneling | use a trim roller
Nothing screams “painted paneling” like stippling from a 3/8″ nap on a roller. My ideal roller for painting paneling is a 6 1/2″ microfiber trim roller with a 1/4″ nap like . It will hold more paint than a foam roller, but it won't leave marks like a roller with a 3/8″ nap.
Medium nap rollers, usually 3/8 inch in length, work for a range of semi-smooth to slightly textured surfaces. These rollers offer a balance between coverage and texture application. They work well on these surfaces: Ceilings.
Glossy paint: 1-1 ½ hours and 2 hours before applying the second coat. Semi-gloss: It takes roughly 1 hour to dry and 2 hours before applying the second coat. Matte Paint: 30 minutes to an hour for drying and 1-2 hours before applying the second coat.
The Medium Pile Microfibre Roller
Probably one of the most popular and reliable rollers on the market, these are designed to apply water-based emulsions, such as matt and silk paints, to internal walls and ceilings.
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