In my house (110 years old), when we repair or replace a wall, we use a
modern lathe & plaster method of structural perlite over expanded metal
mesh, finished with plaster (the real stuff, not drywall compound).
I have found the structural perlite a good match to the old browncoat
used in my home. We have used it over the expanded metal to repair the
old lathe & plaster, as well as over old masonry, with excellent
The method our plaster uses is as follows (from my notes of watching his
Mix structural perlite to a fairly stiff consistency.
Wet the area to be repaired to ensure good adhesion.
As it begins to dry, go over wet perlite with a trowel; this will level
the perlite and create a rough surface to take the final plaster coat.
Level the perlite to about 1/16" to 1/8" below the finished wall level.
With a sharp trowel, dig out the perlite where it meets the edge of the
old finished wall, so that a very square edge exists between the old
finished wall and the new perlite, like this:
Old Wall | Perlite repair | Old Wall
When fully cured, apply and finish the final coat.
As I write this, I seem to recall that at one time he added lime to the
mix, but I don't think he has done that the last few times he has been
Hope this helps,
John P. New
London, Onatrio, Canada
On Tue, 2003-08-05 at 09:34, Timothy R. Hoerning wrote:
> This is pretty off-topic, but I'm not sure where else to ask.
> I'm currently in the process of rebuilding the closet in my house. The
> old walls were plaster&lathe. Replacing the walls with sheet rock has
> not been a problem, but the chimney that runs through the closet is a bigger
> In the old wall the grey cement like stuff (I've heard it called animent
> (sp?)) that was applied to the lathe was also slathered on the cinder-block
> chimney to smooth it out before a top coat of plaster could be applied.
> Since alot of this grey cement came off the chimney while tearing down the
> wall, I need to replace it to rebuild the wall around the chimney.
> The question is, what is this stuff and where do I get it? I tried
> explaining it to someone at Home Depot, but didn't have much luck.
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