Nap is the single decision that changes a roller's behaviour most, and it is the one most often left until after the price is agreed.
Nap is the height of the pile standing off the cover. It decides two things at once: how much paint the cover carries between loads, and how far that paint can reach into a surface.
A short nap holds less paint and lays a smoother film. A long nap holds more and pushes paint into texture, but leaves more stipple behind. Everything else about a cover, including fabric and stripe colour, matters less than getting this right.
Work from the surface, not from the paint tin. The same emulsion behaves differently on a skimmed ceiling and on a textured render, and the cover has to absorb that difference.
| Smooth plaster and plasterboard | Short to medium nap, for a flat film with minimal stipple |
|---|---|
| Lightly textured walls | Medium nap, enough to fill the texture without heavy stipple |
| Render, brick and blockwork | Long nap, to reach the low points in one pass |
| Doors, trim and cabinets | Foam sleeve rather than a napped cover |
A shelf with six nap grades confuses the customer who is standing in front of it. Most retail ranges work better with three clearly coded grades: fine surface, general purpose and textured.
Stripe colours do the explaining. Once a customer learns that the green stripe is the general purpose cover, they stop reading the pack and start reaching for the colour.
Whatever grading you choose, it only works if the stripe colours stay identical between shipments. That is why we hold the approved sample as the production reference.
Nap length on its own does not describe a cover. Ask for the whole picture before you compare prices, or you will be comparing two different products.
Thermofused 7 inch acrylic roller set with 18 mm nap and green push in frame.
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White acrylic fibre refill for 9 inch cage frames engineered for a fine surface finish.
View productAcrylic pile cover with rounded end for European push in frames, yellow stripe.
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4 inch mini foam sponge roller set with frame for oil and water paints.
View productOnly the 7 inch acrylic set publishes a figure, 18 mm. For every other cover the nap is agreed with you at quotation against a physical sample.
It carries more paint per load, so there are fewer trips to the tray, but it leaves more texture. On a smooth wall that texture is a defect, not a feature.
It can, but you lose the ability to grade the shelf. Three grades is the usual compromise between simplicity and choice.
As pile height above the backing. Ask any supplier how they measure it, because the method matters as much as the number.
Tell us the surfaces your market paints and the finish they expect, and we will suggest the nap grades worth sampling.
