Rollers come in different sizes, materials, and "depths". Once again, there are major differences in qualities: if you plan on keeping your roller for more than one usage, the choice of handle and "cage" can be a crucial one. The actual "sleeve" may be re-used only if a great deal of care and time is spent in the cleaning process. Most people opt for a high quality handle and disposable "sleeves".

"Depth of Nap"

(This is the thickness of the "fur" or sponge, and must be chosen carefully to get the right effect. Different paints require different depths.)

• 5 mm For smooth surfaces, such as ceilings
• 10 mm For surfaces with a slight texture
• 20 mm For rough surfaces (e.g. concrete block)
• 50 mm For extremely rough textures

Trays:

Made of metal or plastic, a good tray is a wise investment, and should last through many jobs. Additionally, one may purchase a disposable tray, which fits inside the permanent one. This makes cleanup very easy indeed!

Using the roller:

Fill the roller tray half full. Roll the roller into the paint, and then back and forth in the dry section to remove excess. Paint a large "M" or "Z" (about 2 feet square) onto the wall, and then fill it in with light, short strokes. Repeat on an adjacent section, lightly lapping paint from this latter into the first. Make very light finish strokes in one direction only.