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Is there a way to skim coat or tile over an old lath and plaster ceiling?
Wiki User
∙ 14y ago
lath and mortar walls and ceilings have a greater flexibility than standard plaster. If you do plaster over it you firstly need to be very confident that the old mortar is sound and fully adhered to the lath. You would also have to seal the ceiling well to stop the water in the plaster from literally being sucked out of the plaster. Regarding tiles. If you are thing about ceramic tile then NO!. The weight of the tiles would pull the mortar from the lath with great ease. It is defiantly better to either plasterboard directly to the old ceiling and using dry wall screws NOT NAILS screw directly to the joist not the late you can then put a good scrim tale over the joints and plaster accordingly. The very best option however, is ...............drop the old ceiling, re-board and plaster
Wiki User
∙ 14y ago
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Why is your ceiling bowing?
Could be a couple of different reasons.... Your ceiling joists could be longer than the recommended span for the size of the joist [ie: 2x6 or 2x8], and over time the weight of the ceiling material and whatever is directly above them may be bowing the ceiling down.... or In older homes with plaster ceilings with wood lath instead of gypsum sheet panels [sheetrock], the plaster sometimes breaks free from the wood lath and sags. This especially happens when there has been a water leak above the ceiling at some point......
Why do you plaster walls?
Before the advent of plaster board (sheetrock), plaster over wood lath was the most commonly used method for creating smooth interior wall surfaces. It normally involved a rough basecoat over the wood lath, and then a smooth, white finish coat to create the final surface. Since sheetrock has gained popularity, plaster has become less common. However, special sheetrock, called blueboard, as still sometimes used as a base for a finish coat of smooth white plaster. This is a high end treatment that creates a smooth, seamless, hard, and extremely durable wall surface. Applying the plaster in this way is a tricky process that is best left to professional plasterers.
Should you paint over cracked ceiling plaster?
No
What is the difference between skim coat and plastering?
In olden days of yore plaster was applied over wooen lath which gave the plaster something to adhere to . Thus a much heavier coat of plaster could be applied because of the space between the lathes. the next day a second coat was applied called the skim coat because it's only purpose was to fill in the imperfections left from the first coat. fast forward to now the plaster comes in sheets much the same as sheetrock ex cept it is blue, and rightly called blueboard , after the hangers screw the bluboard to the wall and ceiling a team of plastererscome in and put a skim coat of plaster over the whol board, the joints require a heavier coat. After this coat dries in a couple of hoursor less the plasterers come back and apply a veneer thickness to the wall and dampen the plaster with a brush being waved in front of the board.Thus completing the plaster job. Now a oldtime plasterer like my brother-in-laws brother is a real plasterer and I was lucky enough to have him plaster my house when we built it, would walk off a job if they wanted him to use blueboard., as he is a old time plasterer who is an artist as he makes crown mouldings an other plaster designs on top of a coulple of inches thick.of base plaster. if you get a chance to see a real plaster job and a blueboard job you can tell the difference and both shine over sheetrock and compound job.
How do you vault your ceilings?
There are several different vaulted ceilings. Cross or Groin, Barrel, and several deviations of symmetry of such. Some people refer to "Cathedral" ceilings or "tray" ceilings as vaulted ceilings, but they are not in the "puritan" vein. Assuming that the existing framework is up to local building codes, and the height is adequate, a plywood re reinforced template with2x's, every 16"o.c. or 24"o.c. or as needed, suspended from the existing ceiling/wall framing. This will serve well for wire lath & plaster, and will last over a lifetime due to the strength of the wire lath and plaster system. For drywall attachment the framing is much more ardrous and the time is better served to upgrade the finish plaster and not spend money framing. Wire lath can suffice the tightest of radius's as well. Don't forget, if you have a window dormer or window within the ceiling assembly, make it interesteing by "returning" the window to the ceiling using the same radius as the ceiling only adjacent to the ceiling for the desired distance of the return. Freedom of form-Wire lath & Plaster-That's why it's been around for 2000+yrs. & in essence, your building your own trusses. For more information on this system or other systems similar to these visit www.ornaplas.yahoo.com.
What types of primer over 1. plaster 2. drywall 3. drywall with mud skim coat 4. plaster with mud skim coat?
I use basic drywall primer over all of those.
How do you find ceiling joists without a stud detector?
You really can't.If the house was made after the 1960, there are strips of board 3/4" thick nailed to the trusses or joists and the drywall is fastened to them.The stud finder will pick these up, but they're not structural and are only designed to support the wallboard of the ceiling itself.If the house is pre '60s, the ceiling is probably plaster over 1/4" wooden lath and may have a layer of wallboard over that.You're going to have to cut a hole to locate the joists if you need a strong connection.
Why is the plaster on a gunite pool gray in the middle and white on the gunite side and white on the outside?
The finish plaster is normally white all the way through. It sounds like you are dealing with a pool that has been replastered by the method of putting a "brown coat"/"scratch coat" (the gray plaster you noted) over the original finish plaster surface, and a new finish coat of white plaster on top of that. The scratch coat more like a thin concrete than plaster (doesn't have the white marble dust in it) and is used to get a better bond to the old surface.
How do you replace canvas ceiling?
Below is a reply I cut an pasted from another site. The type of canas and glue were not specified, still thought it useful: Date: 7/15/2002 11:53:29 AM Subject: Re: Restoring a plaster ceiling covered in canvas Message: I recently worked on a brownstone restoration project in New York. It was a Victorian home that had similar problems, the plaster lath ceiling had deteriorated and started to fall away, due to water damage, and fell onto a stretched canvas that was over the ceiling. There were murals painted on the canvas so we wanted to restore the plaster, then reapply the canvas, then retouch and repaint the mural as needed. So the first thing to do is to repair the plaster ceiling. We first removed the canvas from the ceiling, some of which was reusable, some not, carefully marking each location so we could re-install it into its original place. The ceiling then had to be replastered. An actual restoration of original plaster can be complicated. You may want to secure sheets of drywall to your ceiling, basically making it new. To restore the plaster work, it was necessary to remove any loose areas, then by using epoxy resin injections, re-secure any loose or shifting plaster pieces. Using a syringe, we injected epoxy directly into loose plaster areas and into the wooden lath. Once this was done we applied layers of plaster, building up slowly until the surface was smooth and repaired to the specifications we desired. Then we carefully reapplied the canvas, not unlike applying specialty wallpapers. A good wallpaper professional, skilled in the application of antique wall coverings, or canvas backed papers, could do this. In our case, the canvas was applied directly to the ceiling. You mentioned that your canvas is suspended below the ceiling approx. 4 inches. This seems to be an unusual technique for that period, 1910 -1920. Be sure that the canvas just doesn't appear to be suspended (due to sagging or plaster fragments that dropped and stretched the canvas) and wasn't initially attached directly to the ceiling. If it truly is suspended then just pay careful attention to the method that the canvas was attached and try to duplicate it upon reinstallation. Try to re-hang as much of the original canvas in its original location
Each pail of plaster covers 97 square feet of ceiling How many pails of plaster would you need to buy to cover the ceiling of a room with walls 14 feet long?
Area of the ceiling = (14 x 14) = 196 square feet Number of pails = (196/97) = 2 pails, with enough plaster left over to cover another 2 square feet.
Why do you need to use skimcoat?
It is done to smooth over rough looking surfaces to give them a smooth, even look. If you skim coat, you most likely live in a lath and plaster house. If you have a newer house with drywall, and the surface you need to coat is very large, compare the cost of just re-rocking that portion of the wall, or the entire wall. Whatever. Skimcoating is labor intensive so you could end paying the same price for either choice. If I had the choice, I'd go drywall. Then you know you have a nice new surface to work with. Even with lath and plaster, you might be better off putting 1/2" drywall over the entire wall. I've seen some bad skim jobs too. It isn't that easy to do it right. Put pencil to it.
How do you hang drywall over plaster of Paris?
Paster of paris is a form of drywall, so I'm unclear on your meaning except possibly you have a wall with plaster over lath and want to cover it with drywall. You can find the studs electronically and go ahead and attach drywall to the face of the plaster with extra long screws. - Personally, I would rather repair whatever is wrong with the plaster and lath.
