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Is this plaster? nmbexcuse 09-05-2007
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Posted by on September 5, 2007, 4:34 pm
I am sorry for my ignorance. I thought I was dealing with drywall,
but when I removed part of this interior wall (built in 1972), I saw
this:

http://i173.photobucket.com/albums/w67/143house/framing/P1010273.jpg
http://i173.photobucket.com/albums/w67/143house/framing/P1010275.jpg

basically it seems like I have three layers. Inside is a gray drywall
like layer, then a brown thin layer that looks like paper but thicker
than paper, and on the outside a thin white layer that is like an egg
shell (is it stucco?).

Along the edges or joints, I have this wire mesh (chichen wire)
embedded inside the wall board.

http://i173.photobucket.com/albums/w67/143house/framing/P1010276.jpg

Anyone familiar with this? What is the best way to patch holes or
finish joints to it? I would have to trim off all the wires all over
right?

Thanks,

MC


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Posted by Clark on September 5, 2007, 5:25 pm
nmbexcuse@hotmail.com wrote:
> I am sorry for my ignorance. I thought I was dealing with drywall,
> but when I removed part of this interior wall (built in 1972), I saw
> this:
>
> http://i173.photobucket.com/albums/w67/143house/framing/P1010273.jpg
> http://i173.photobucket.com/albums/w67/143house/framing/P1010275.jpg
>
> basically it seems like I have three layers. Inside is a gray drywall
> like layer, then a brown thin layer that looks like paper but thicker
> than paper, and on the outside a thin white layer that is like an egg
> shell (is it stucco?).
>
> Along the edges or joints, I have this wire mesh (chichen wire)
> embedded inside the wall board.
>
> http://i173.photobucket.com/albums/w67/143house/framing/P1010276.jpg
>
> Anyone familiar with this? What is the best way to patch holes or
> finish joints to it? I would have to trim off all the wires all over
> right?
>
> Thanks,
>
> MC


Looks like plaster over wallboard, I have the same in my house (circa
1955), I patch fine with small holes, using regular sheet rock compound or
whatever patching material says it can be used over plaster or gypsum.

For the bigger stuff (although I don't like to work with it) Is the setting
type, as it has plaster of paris in it.

http://paint-and-supplies.hardwarestore.com/50-276-joint-compound-powder.aspx
(they have PDF info files on the chemical makeup of each product)


for the wire mesh, if it does not have to go, I have just screwed it down
and compounded over it, as it acts as the compound tape

Clark



Posted by Clark on September 5, 2007, 6:50 pm
Clark wrote:
> nmbexcuse@hotmail.com wrote:
>> I am sorry for my ignorance. I thought I was dealing with drywall,
>> but when I removed part of this interior wall (built in 1972), I saw
>> this:
>>
>> http://i173.photobucket.com/albums/w67/143house/framing/P1010273.jpg
>> http://i173.photobucket.com/albums/w67/143house/framing/P1010275.jpg
>>
>> basically it seems like I have three layers. Inside is a gray
>> drywall like layer, then a brown thin layer that looks like paper
>> but thicker than paper, and on the outside a thin white layer that
>> is like an egg shell (is it stucco?).
>>
>> Along the edges or joints, I have this wire mesh (chichen wire)
>> embedded inside the wall board.
>>
>> http://i173.photobucket.com/albums/w67/143house/framing/P1010276.jpg
>>
>> Anyone familiar with this? What is the best way to patch holes or
>> finish joints to it? I would have to trim off all the wires all over
>> right?
>>
>> Thanks,
>>
>> MC
>
>
> Looks like plaster over wallboard, I have the same in my house (circa
> 1955), I patch fine with small holes, using regular sheet rock
> compound or whatever patching material says it can be used over
> plaster or gypsum.
> For the bigger stuff (although I don't like to work with it) Is the
> setting type, as it has plaster of paris in it.
>
> http://paint-and-supplies.hardwarestore.com/50-276-joint-compound-powder.aspx
> (they have PDF info files on the chemical makeup of each product)
>
>
> for the wire mesh, if it does not have to go, I have just screwed it
> down and compounded over it, as it acts as the compound tape
>
> Clark

After looking again, I'm not as sure as I was with the first reply, (the
plaster part looks thin to me) hmmmm.

I think I would still stick with the setting type compound.

Clark



Posted by Mark on September 5, 2007, 9:52 pm
Looks like plaster over sheetrock lath or drywall. The thin top coat is
either the finish skim-coat that gives the surface a smooth finish, or a
thick texture paint, can't really tell from the picture, but if it is soft
and flexible it is probably paint. Stiff and brittle it's a skim coat.

>I am sorry for my ignorance. I thought I was dealing with drywall,
> but when I removed part of this interior wall (built in 1972), I saw
> this:
>
> http://i173.photobucket.com/albums/w67/143house/framing/P1010273.jpg
> http://i173.photobucket.com/albums/w67/143house/framing/P1010275.jpg
>
> basically it seems like I have three layers. Inside is a gray drywall
> like layer, then a brown thin layer that looks like paper but thicker
> than paper, and on the outside a thin white layer that is like an egg
> shell (is it stucco?).
>
> Along the edges or joints, I have this wire mesh (chichen wire)
> embedded inside the wall board.
>
> http://i173.photobucket.com/albums/w67/143house/framing/P1010276.jpg
>
> Anyone familiar with this? What is the best way to patch holes or
> finish joints to it? I would have to trim off all the wires all over
> right?
>
> Thanks,
>
> MC
>


Posted by MiamiCuse on September 5, 2007, 11:07 pm

> Looks like plaster over sheetrock lath or drywall. The thin top coat is
> either the finish skim-coat that gives the surface a smooth finish, or a
> thick texture paint, can't really tell from the picture, but if it is soft
> and flexible it is probably paint. Stiff and brittle it's a skim coat.
>
It's stiff and brittle, but a skim coat over the entire wall board?

I have removed a section of the soffit and now need to patch a two feet
strip all the way across the top of the wall and ceiling. I don't know if
regular sheet rock will match, I will have to try 3/8" sheet rock and try to
match it I hope the thickness will be even.

Thanks,



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