Plastering screeds
Straightening the wall using screeds
An example of horizontal and vertical screeds.
A screed is set horizontally at the top between the corner strips. Another screed is set between the horizontal screed and the metal weep screed at the bottom. A horizontal screed is being set in the middle.
I used arrows to show vertical screeds set about 5 feet apart between the back of the frieze board and the weep screed at the bottom. Now you see why weep screeds are called screeds. A straight edge is used for this, either a rod or even a straight board. There are a lot of methods for doing this.I'm just trying to provide an overview. The end result is to get the wall straight, or a curve, if you want a curve
Wall is then filled and rodded off in between the screeds. In concrete work, a straight edge is called a screed, and rodding off the concrete is called screeding. In plastering, the straight edge is called a rod.
The other side is done the same way. Here, the corner strip is removed preparing for the finish coat. The walls are dead straight. The most important step in plastering is the brown coat, and straightening the brown coat. The finish will follow the contour of the finish, whether it is straight or looks like the ocean. The idea of the finish coat magically making everything look right doesn't work.
Larger walls are more complicated, but the principle is the same. The screeds illustrated here are called "soft screeds", because the are set and filled at the same time. It is OK in inside plastering to let the screeds set up overnight, as long as care is used to fill in between the screeds, and not over the screeds. A screed in cement if left overnight will show a hump in the finish coat. I plastered a hallway in a school in Maryland many years ago with cement plaster, that you can see a hump where every screed was through the finish. It got late on me, so I left the screeds to set up overnight. I'm not going to tell you where it is, but my plaster chalk boards and stucco ceilings still look fine.
Curved screeds are made using ropes. Ropes are put around the wall about every 5 feet.
More details on how this is done in the future Here
A weep screed is a length of metal for the bottom of a stucco wall. The 3/4" screed defines the wall thickness.
Another example of a pre-made metal screed is this Plaster Channel Screed made byFlannery Trim in San Fernando, California.
Here is our job we did with channel screeds. A panelized look was needed to look like an old gas station.
I hope you have an idea what screeds are.