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Thread: plaster wall problems.

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  1. #1
    DIY Junior Member roadk's Avatar
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    Jul 2006
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    Default plaster wall problems.

    hey guys.
    got a question, not sure it can be answered.

    i've got this wall in my bathroom with a window on it.
    the wall is plaster from 4 foot above the floor to the ceiling.
    i replaced the bottom half of the floor with wainscoting.

    i wish to paint the top half, but the plaster is cracked, and it's loose in some spots.

    i would just put 3/8 sheetrock over all of the plaster, but it would push the top of this wall out that much, which would make me lose the depth of the existing winder molding. i would like to keep the existing depth of the windowing casing if i could.

    1/4" sheetrock might do the trick, but there aren't many studs behind the plaster. it would have to be screwed/glued to the plaster...

    any suggestions for fixing the plaster without coming out too much?

    thanks for any help anyone can offer.

    -thomas

  2. #2

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    I would remove the loose stuff first. Then I would get a tub (or two) of DAP vinyl spackling and just start filling in the cracks and holes. The stuff dries very hard and you can swirl it with your drywall knife to match the texture (if there is a swirly texture.)

  3. #3
    DIY Junior Member roadk's Avatar
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    Default

    thanks for the reply.
    you think it's best to do a skimcoat over all of the plaster?
    i'm not sure i'll get great results with my limited exp. in spakling...
    i was hoping to do something with 1/4 drywall, or perhaps a paper sizing...
    -thomas

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
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    Default

    I'm not a pro at this, but I think you might find it easier to install the 1/4" drywall, especially if there is a lot of loose stuff. It would work best if you can locate the studs to screw into...since you are covering it up, a few drilled holes should locate them. Just watch out for pipes and wires! Outlets and switch boxes are usually mounted to a stud, so that should help you locate at least one or more on the wall.

    I think it really depends on how loose the stuff is, and how much of it you have to contend with. If it is really loose, and there is lots of it, it might be best to tear it out. Minor cracks should be okay with the new layer over it, especially if you can hit some studs.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  5. #5

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    Quote Originally Posted by roadk
    thanks for the reply.
    you think it's best to do a skimcoat over all of the plaster?
    i'm not sure i'll get great results with my limited exp. in spakling...
    i was hoping to do something with 1/4 drywall, or perhaps a paper sizing...
    -thomas
    I would try the vinyl spackle first. It's infinitely easier than putting in new drywall of any thickness. This is assuming that we're only talking about a small area. There's no need to put a skim coat over all the plaster. Just mix it up, knife it on, and smoothe it out.

  6. #6

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    I'd suggest joint compound.

  7. #7

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    Quote Originally Posted by mal7014
    I'd suggest joint compound.
    Joint compound shrinks and is not nearly as durable as vinyl spackle. Its only advantage is that you can sand it easier. And he would have to sand it a lot, since he would have to put three coats of it on instead of one coat of vinyl spackle.

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