Painting room - Round edges between the ceiling & walls. How to paint them in order when there is no division?

I'm painting my bedroom. It has plaster walls. There is no sharp division line between ceiling and walls, but round edges. How do I paint them in order? The book always tell you to paint ceiling first, but I don't know where does the ceiling begin and where does it end? I'm planning to use roller to paint them. Should I arbitrury start somewhere on the ceiling and stop some where in the middle of the round eddge? Please helpPainting room - Round edges between the ceiling %26amp; walls. How to paint them in order when there is no division?
Paint the ceiling making sure to come down the wall enough, then when dry, use masking tape to make a sharp border. If you don't like the result, you can always put up some crown moulding that will hide the rounded out edge.Painting room - Round edges between the ceiling %26amp; walls. How to paint them in order when there is no division?
Rounded corners or not the design in painting a wall color is to not go into the ceiling color. In a situation where there is a 90 degree joining it's best to paint a wall color just below the ceiling corners,IE: 1/16th of an inch,,, as any errors are most obvious when wall color bleeds into it, as opposed to the opposite.


Certainly all suggestions here so far are valid, and blue painters masking tape is the accepted medium now, for straight lining with no damage to any dry surface it's applied to.





In your case I'd define the point at the bottom of the curve, with tape and it will not be an issue.





Adding anything will add cost and labor, but certainly that is an option.





I do this every day, and have issues in each job, that demand research, care, skill, and patience.





For your ';straight line'; you might invest in a laser sight level or snap a chalk line at the point of the bottom of the curve, along each wall.





Rev. Steven
You can create your own division by painting the ceiling first, let it dry, then use the green painters tape and tape where the ceiling should meet the wall, tape around the room the entire height of the wall. Then paint below, what ever color you choose.
you can paint the ceilings and walls the same color.if you don't want to do that.take a small two bye four block lay it flat on the ceiling and mark the bottom of the block in every corner.get some blue painters tape(because it will not stick so hard you cant get it off)AND WITH SOMEONE HELPING YOU STRETCH IT OUT FROM ONE END TO THE OTHER IN A STRAIGHT LINE AND PRESS DOWN TIGHTLY.IF YOUR ROOM IS LONGER THAN TEN FEET TAKE THE BLOCK AND MARK IN THE MIDDLE AND STRETCH TAPE FROM CORNER TO CENTER MARK.THIS WILL GIVE YOU A CLEAN STRAIGHT LINE TO PAINT.THEN AFTER THE CEILING HAS DRIED REPEAT THE STEP BY PUTTING BLUE TAPE ON THE FINISHED CEILING THUS PRODUCING A CLEAN LINE.THIS BEATS TRYING TO CUT THIS TYPE OF LINES BY HAND.OF COURSE YOU COULD USE A SMALL LASER TO DO THE MARKING IF YOU HAVE ONE AVAILABLE
I would have to agree with everwolf. I just painted a ceiling that is rounded. The biggest thing is what colors will you be using. If one is darker than the other, paint the lighter one first as it is easier to cover if you run over the chalk/tape line with it.
One solution would be to paint the ceiling the same color as the walls -- then it doesn't matter where the division is. Another possibility would be to paint the ceiling color a few extra inches down the wall -- kind of like a stripe. If you wanted to do that you would just need to get some masking tape and make sure your line is straight.
If you are going with one color, there would be no division line. Just start at the top and work your way around. I painted my bedroom, which sounds similar and that is what I did.
No, you no longer need to tape.