Historic plaster ceilings replaced in Baltimore, Maryland

historic plaster ceilings-plaster jacks
Historic plaster
              ceilings=scaffold
I brought out my plaster jacks for this ceiling. Plaster jacks
allow the height of the scaffold to be adjusted in 3 inch
increments.
We covered the floors with a layer of plastic and then a layer of Corex, sort of a plastic masonite. The boards clamped to the jacks are called batts. They can be 2 by 4's 2 by 10's or whatever.
If you are looking to buy plaster jacks, end your search. They haven't been made since 1951.
Historic plaster ceilings-Homemade bench type
              scaffold
Filled with planks, the scaffold is good to go
Homemade bench type scaffold is used for the lower ceiling.
The old steam heat radiator is disconnected to allow us to
patch behind it.
Filled with planks, the scaffold is good to go.

old lime and sand plaster is stripped off the
              wood lath
ceiling is furred down with RC-1 channel
First the old lime and sand plaster is stripped off the wood lath and put into contracor bags. The wood lath is then pulled off and put into bundles.
The ceiling is furred down with RC-1 channel. The idea is to take
out at least half the waviness and provide a frustration free
surface to screw the plaster board to. These old joists can be super hard.
ceiling is furred down with RC-1
              channel
veneer basecoat plaster is put on
              thick and rodded off
We put up blue board, or veneer plaster board with plenty of screws.
We put plastic mesh tape on the joints. It says fiberglass tape on the package, but there are no glass fibers in this tape. I painted the boards with plaster weld for insurance my ceiling won't fail. This probably wasn't necessary, but I heard of someone having failure using this brand of board.
The veneer basecoat plaster is put on thick and rodded off with a homemade slicker. The ceiling is almost straight now. The surface
of the basecoat is roughed up using a stiff brush.
white coating the ceiling
Plaster is troweled so slick the
              flies can't walk on it.
We are white coating the ceiling and truing up the edges with a rod.
In other words, we are straightening up the finish coat with a straight edge.
Plaster is troweled so slick the flies can't walk on it. A little exaggeration.
Plaster is usually loose under
              windows
Metal lath is screwed on over the
              old wood lath
Don't forget under the windows. Plaster is usually loose under
windows that have had air conditioners.
Metal lath is screwed on over the old wood lath and cut to fit.
Moulding plaster and lime
loose areas are repaired
Moulding plaster and lime sets fast and allows for quick completion of patches.
A few other loose areas are repaired, and we are marching downstairs for phase 2. Please check back. We have some cool stuff to do.