Step #3: Understand Nap Thickness 3/16” - ¼”—For smooth surfaces like metal doors, trim and cabinet doors; works well with semi-gloss or gloss coatings.
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.
Glossy paints have a very high sheen and will tend to show more lint on the surface from the roller. Therefore, when using a gloss or semi-gloss paint, it is important to choose a shed-resistant woven cover.
Walls, ceilings and paneling require a slightly larger nap size of 3/8-inch; for lightly textured walls, decks and concrete, use a ½-inch nap; and for textured ceilings, stucco and masonry, use ¾-inch.
For interior projects, foam or microfiber rollers with a 3/8-inch nap are usually used for smooth surfaces like walls and ceilings. For exterior projects, longer naps, such as 1/2 inch to 3/4 inch are best suited for rough surfaces like stucco or brick.
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. Smooth Surfaces - Use a white woven short nap roller for an ultra fine finish.
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.
Thicker naps hold more paint, helping get it into nooks and crannies. Smaller naps are better for smoother surfaces because you waste less paint. Here's a quick guide to paint roller nap sizes: 3/16-1/4 inch: Ultra-smooth finish for painting walls, doors, and trim.
More often than not, roller marks occur when you fail to load your roller with enough paint, or have exhausted the paint in your roller and are trying to cover more area than you should.
Load the brush with your gloss paint and wipe away any excess, then begin painting very gently and lightly in long strokes to achieve one final coat with the gloss and avoid brush marks.
Woven rollers are made from various synthetic fabrics, including polyester and microfibre. They come in several pile depths, so you can find the right tools for your decorating project. Woven rollers are ideal for applying water-based gloss paint.
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. A 1 1/4″ roller nap is reserved for the most textured surfaces.
Short or medium pile microfibre mini rollers are the best when applying water-based, woodwork paints, such as Quick Dry Eggshell, Quick Dry Satinwood or Quick Dry Gloss. Avoid using foam mini rollers when applying Quick Dry products, as these can cause paint bubbles to form when rolled onto the surface.
3-5mm NAP. A thinner nap provides a smooth quality finish using water based or oil based gloss or semi-gloss paints. They are designed to hold a small amount of paint, which also helps in gaining that ultra smooth finish.
High gloss paint adds a layer of sophistication and modern style to any space. Its reflective surface not only enhances the look of the room but also creates a sense of depth and dimension. This makes rooms appear larger and more open, imbuing them with a lively and dynamic character.
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.
Pro painters pick rollers based on the paint and surface. Nylon or polyester for water-based paints, mohair for oil. Nap length matches texture—short naps for smooth walls, long ones for rough surfaces.
Many painters “break in” a roller cover by priming it with water or thinner. In our lab we never prewet a cover before painting. If you choose to, you must spin it out with five or six strong pumps so it is only lightly damp. Then take even more moisture out by blotting the cover with a paper towel.
What happens if you apply a second coat of paint too soon? Applying the second coat of paint before letting it dry will result in peeling, clumping, and bubbling that can be time-consuming and expensive to repair. It can also result in an uneven colour, ruining its appearance.
But it needs a whole day to be completely dry. Oil-based paint is like a slow turtle; it takes about a full day to feel dry to the touch. Water-based paint is quicker, like a rabbit, drying in about 6 to 8 hours. High gloss paint takes the longest, needing even more time to dry because it's extra shiny.
Recoat Time for Oil-Based Paint
Water-based paints dry considerably faster than oil-based paints because the water evaporates to let the paint dry. Oil-based paints contain no water. Though oil-based paint may feel dry after only a few hours, it's best to wait a full 24 hours or more before applying additional coats.
Similarly to the approach with the ceiling, start painting your walls at the top, cut in around the edges and cover your fixtures with tape before cutting in around those.
Professional house painters typically charge an average of $3 to $6 per square foot, $20 to $50 per hour, or $200 to $500 per day. The average cost to paint a 10-foot by 12-foot bedroom is $391 for just the walls or $815 for a full paint job that includes ceiling, walls, baseboards, and trim.
Some tips for painting a room quickly and easily are: 1) Choose a light color paint, as it will require fewer coats; 2) Use a paint roller for large, flat surfaces; 3) Use a paintbrush for smaller surfaces and areas around trim; 4) Paint the ceiling first, then the walls; and 5) Begin painting in the corners and work ...