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chsitko 08-27-2010 06:04 PM

Plaster Walls? I dont know?

We have a home that was built in the 1950's. I just got done installing a new front door. The previous door had no molding, the plaster went right up and around the corner till it hit the door frame. I had to cut the plaster back in order to remove the old door and install the new.

I'm not to familar with plaster techniques but i was surprised to see that drywall was attached to the framing, with a dark grey - concrete like material ontop of the drywall and then what i assume to be a very thin plaster coat on the top of the grey.

Is this common?
Do i have plaster walls or something else?

I need to finish the interior walls where the door meets, and i am looking for suggestions. I can extend the jamb and put molding around the door, or try to create a new corner with the plaster up to the frame like it was before. My concern with the plaster is that it would be almost an inch thick. Is that to thick for plaster?

Allison1888 08-27-2010 06:30 PM

This doesn't seem like plaster, but perhaps a coat of plaster like material around the edges. You'd have to cut into the drywall to see if there is real plaster and lathe behind it, but don't do that unless you really need to!

I would extend the jamb and add molding.

12penny 08-28-2010 01:41 PM

Its rock lathe, gray scratch coat and then top coat. Was done after the time of wood lathe and before the time of drywall.

chsitko 08-28-2010 04:13 PM

Am i correct in assuming the top coat is actually plaster as i had originally thought?

If i need to patch the rock lathe, what would i use. It appears similar to an exterior stuco base coat.

chsitko 08-28-2010 05:30 PM

So after doing some further research i now understand that the rock lath is what i mistook to be drywall. The grey scratchcoat is probably somthing similar to USG Structo-lite with plaster on top.

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