My previous posting showed skim coating prep for inside corners. If you have outside corners they need to be fixed also.
Here is the soffit over the vanities at the Lightyear Sunken Bath Project. We are cornerbeading it to create a smooth job.
Cornerbead is available in 8′ and 10′ lengths most places. When you have a run that is longer, and need to butt two pieces together you bridge them. Bridging is using a small piece of bead behind your outside corner. This allows you to butt the next length to it and have a smooth line to tape and mud.
Now that the corner bead is installed the skim coating continues. Here I have skim coated the the walls of the soffit, but without running the beads. This gives a smoother area to run your knife against when filling the beads and the inside corners. A little work now saves a lot of work later.
I am using USG Dust Control Mud here as it works so well. Sands like a dream and clumps together for clean up.
Here is the corner with the next skim coat applied.
Here is the soffit area where we installed the bridging at the top of the post.