There are two basic classes of plaster work, flat and ornamental. Our craftsmen provide restoration, repair and fabrication services primerily for ornamental plaster. We are experienced in all phases of plastering projects, from condition evaluation and documentation to pricing and execution. We can determine the soundness of the plaster base and, if necessary, reproduce any damaged or missing decorative elements.
Flat plaster consists primarily of walls and ceilings, usually applied over wood lath, metal mesh, "blue board" or unit masonry such as brick or terra cotta tile. These layers can be smooth, textured or struck to imitate other materials such as stone. Flat plaster is often the base or ground to which ornamental plaster is applied. Read more about lime plasters here.
Ornamental plaster includes moldings, columns, capitols, and many other decorative elements. Some of our suppliers are still producing the patterns they sold in the early 20th century, nearly any custom item can be created in our shop. To see some examples of ornamental plaster. To learn more about how ornamental plaster is made click here. To see photos of one our plaster projects click on thumbnail.
Below is some general information about plaster.
Commonly used types of Plaster:
- Lime plaster ( used until early 20th century)
- Gypsum plaster ( all modern plasters)
- Gauging plaster and Molding plaster or plaster of Paris
Materials used in the making of ornamental plaster:
- Plaster of Paris or molding plaster Hydrated lime alone or in combination molding plaster.
Plaster is commonly reinforced with one or more of the following:
- hemp
- horse or cow hair
- jute
- cotton
- string
- wire (should be rust proof)
- wood
Materials used in mold making:
- shellac
- clay or plasticene
- plywood
- caulking
- wax
- small brushes
- mold compounds (silicone rubbers or catalyzed polyurethanes)
- Plaster (molding or plaster of paris)
- drill motor with mixing paddle