PLASTER REPAIR CRACK

Gypsum Plaster: A plaster mixture containing gypsum as the bonding agent. Synonyms include gypsum boards and drywall. It may also be used as exterior wall sheathing, in which case a water-resistant material replaces the paper. The panels are used to cover interior walls and ceilings and are the most common materials for that purpose since gypsum drywall replaced true plaster in the 11940s and '50s. Gypsum Drywall: Panels made of a sandwich of gypsum plaster pressed between two sheets of paper. The newer purpleboard and paperless gypsum drywall have now replaced greenboard for applications where mold and water resistance is necessary. Other manufacturers adopted the color scheme. Gypsum originally colored its water-resistant gypsum board green to distinguish it from its other gypsum board products. Greenboard or Green board: A type of gypsum drywall suited for use in damp (but not wet) areas such as bathrooms. Rockers are usually not finishers and vice versa. Rockers hang the drywall, finishers finish it. It is also called the white coat (from the color of lime plaster which is whiter than gray or brown gypsum plaster under it), especially by old-time plasterers and may also be called the color coat because chemical tints were often added to the lime plaster to give the wall its final color.įinisher A person who tapes and finishes gypsum drywall. The final (finish) coat is usually hydrated lime plaster or a blend of gypsum and lime plaster because lime plaster works to a smoother finish than the stronger but coarser, gypsum plaster. It is applied to the second or 'brown' coat and is finished to a smooth surface ready for paint or wallpaper. Also see: Sheetrock.įinish Coat: The final coat of a three-coat plaster wall or ceiling system. The brown coat is no longer brown in color but the name persists from the days when the hydrated lime second coat was darker than the final or white coat.ĭrywall: The most common name for gypsum drywall.

It is typically about 3/8' thick.Īny unevenness left in the scratch coat is removed by the brown coat which leaves a flat, level surface for the final or 'finish' coat. The brown coat is the leveling coat applied over the first or 'scratch' coat of gypsum plaster. Other manufacturers adopted the color scheme.īrown Coat: The second coat of a three-coat plaster wall or ceiling system. Gypsum originally colored its plasterboard blue to distinguish it from its other gypsum board products. In your locality, there may be slight variations.īlueboard or Blue board: A term commonly used in the construction trades to mean plasterboard. Here is some common plaster and drywall terminology as used in the Mid-West. Like all fields in the building trades, plastering and drywall have their own peculiar terminology. I use all-purpose, ready-mix joint compound for the succeeding coats, and I apply these exactly the same as if I were finishing drywall.A Glossary of Plaster & Drywall Terminology Durabond is almost unsandable, though, so I make sure to wipe the edges and overlaps clean. The advantage of using Durabond (over a traditional plaster) is that it sets up as hard as plaster but dries quickly, so if I’m in a hurry I can apply a second coat the same day. After packing the joint with compound, I cover the seam with fiberglass mesh tape, and follow up with a second layer of compound. I use a setting-type joint compound like Durabond 90 to fill the gaps, mixing up only as much as I can apply in about an hour.

PLASTER REPAIR CRACK

When all of the washers have been fastened, I vacuum the crack to remove any debris, then lightly mist the surface with water to prevent the dry plaster and lath from drawing moisture out of the patching compound before it’s had time to cure. After wiping away the excess joint compound, the crack is covered with fiberglass mesh tape, which is soon covered with a second layer of compound.

Plaster repair