A roller that sheds is usually the cheap sleeve
I rolled a chimney breast on a Saturday in May and the wet film filled with fluff. White hairs, a few longer ones, stuck in the emulsion like grass in mud. I thought the lining had dusted. I picked a hair out. It was the same grey as the new sleeve I had bought in a two-pack with the tray. I kept rolling, hoping the next coat would bury them. It buried some. It welded the rest into a texture I could see from the door.
A roller sleeve is a tube of pile that picks up paint and puts it on the wall. That is the whole job. If the pile is loose, it becomes part of the finish. A cheap sleeve sheds on the first load. People blame the paint. The paint was doing what paint does. It held the fibres the sleeve let go.
I now check a new sleeve before it sees the wall. I wrap a strip of tape around the pile, press, and pull. If the tape comes away furry, that sleeve is already on the wall in waiting. I do the same with my hand. A snow of bits is a no. I also look at the ends. Bare foam or a ragged crown will leave lines and more fluff. A sleeve that is meant for the paint I have, short pile on a smooth lining, medium on a bit of texture, saves me a second trip.
Load matters. I dunk, roll out in the tray, and do not walk to the wall with a dripping sausage. Excess paint carries loose pile with it and then spatters. I start on a bit of lining I can live with, or on a card, for the first two passes. The first load is when a cheap sleeve dumps. Filler that shrinks is usually the deep hole is why that first pass should not be over a crater I filled this morning. Sand, then roll. A hollow holds a clot of fluff you will never get out cleanly.
Lining paper that bubbles is usually the paste is the face I am often rolling. I do not roll lining that is still soft. The sleeve drags, the pile snags, and you lift a blister you then paint over. Wait until the lining is dry and the paste is not tacky. Masking that bleeds is usually the wrong tape is the edge I cut in first. I keep the loaded roller off the tape. A wet sleeve shoved at the line forces paint under it and leaves fluff on the frame.
UK year changes how long the fluff sits wet. A cold room in January keeps the film open. Every hair is still movable at tea time, which is the one mercy. You can pick. A warm week in July skins the emulsion over the fibres and they are there for good. I would rather pick on the first coat than sand a hairy wall on Sunday.
Skip the two-pack sleeve that costs less than the tray. Skip foam on a wall you wanted a flat emulsion on, unless you like orange peel and loose bits. Skip washing a shedding sleeve and using it again. Wet pile sheds more. Skip rolling over grit from the floor. The sleeve picks it up and prints it. Vacuum first. Skip a sleeve you left standing in the tray overnight. One side is glued, the other dumps.
If fluff is already in a dry coat, I do not pick at it with a nail. I sand lightly, dust off, and roll a thin coat with a sleeve I have already taped. A second cheap sleeve will restock the wall.
I do not need a different emulsion because the last wall went hairy. I need a sleeve that keeps its pile, a first load that happens off the feature wall, and tape I have already used on the roll.
If I later add a buy link here, it will be a paid promo.