How we did it:
Barrel ceiling in
Washington, DC
screeds are set every four feet
angles are laid in and rodded
              off
First, screeds are set every four feet. These are
round and the same thickness. We put on the brown coat in two steps, a scratch coat and a double up coat to make sure it is right.
The angles are laid in and rodded off with a 6 foot rod.
ceiling is filled in
              and rodded off with a 6 foot rod
Another action shot.
Next, ceiling is filled in and rodded off with a 6 foot rod.
Another action shot.
we put on a double up coat and
              rodded it off
Ceiling is finished with color
              plaster
After the ceiling is rodded off, we put on a double up coat and rodded it off to true it up. Ceiling is on the money and about a 1/2 inch thick.
Ceiling is finished with color plaster.
never use lightweight aggregates for plaster.
Chopping mud: mixing plaster with a hoe
I never use lightweight aggregates for plaster.
The just aren't that strong. I used sand blast sand
instead of masonry sand for improved strength.
Chopping mud: mixing plaster with a hoe.
We built a special scaffold over the high end
              counter top 
We built a special scaffold over the high end counter top.