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Help - bubbles appear through plaster

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  1. #1
    Apprentice (new member)
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    Default Help - bubbles appear through plaster

    I have been doing some repair work on a plater wall. The wall was previous painted and didnít have any noticeable bubbles. I have applied base coat and top coat and noticed some bubbles appearing. Does anyone know what may cause the plaster to bubble?

  2. #2
    quality + reliability - 3k Club Member
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    What sort of bubbles Tony?

    Very small, or large.

    Did you use tape at all?

    My guess is that they are very small bubbles, which are common when plastering over a painted surface. The reason is the painted surface is non porus. When the top coat has dried the best thing to do is scrape the tops off the bubbles and give the area a very very light skim coat. Then sand. The light skim coat will dry in no time.

    Do not try to sand them out. What happens is the bubble just fills with dust so you cant see them untill you paint!

    If it si different to what I have described here let us know and we will give you the fix for that.

    Cheers Rod
    GREAT PLASTERING TIPS AT


  3. #3
    Apprentice (new member)
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    Thanks for your reply Rod.

    Small bubbles and lots of them.
    I have been sanding them and that is EXACTLY what is happening when I apply paint - so I will stop that now.
    I did use tape, but that's not where the problem is.

  4. #4
    Old Chippy 6K
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    Rod's 'da man'. but I find that vacuuming after fine sanding and then re-topping works well too.


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