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-   -   Dry wall paste is cracking! (https://www.askmehelpdesk.com/showthread.php?t=243352)

  • Jul 30, 2008, 09:00 AM
    Toolbeltgirl
    Dry wall paste is cracking!
    To seal the cracks on dry wall I applied the "dry wall" paste once, then sanded with thick grain sand paper, then I reaplied, and sanded with thiner grane paper, and I repeated this process one more time.

    The paste is dry (for the past 3 weeks, in addition, it's been really hot weather wise)I applied paint yesterday, but I noticed this morning that I can see cracks where the seems are supposed to be.

    It's not really bad, just 2 cracks in the whole room.

    Thank you,
    Toolbeltgirl
  • Jul 30, 2008, 09:34 AM
    hkstroud
    Did you use tape?
  • Jul 30, 2008, 09:40 AM
    KISS
    Drywall tape, that is. Paper tape is much easer to work with than cloth tape.

    I recently repaired two cracks about a foot long, for the first time and used mesh tape. Results were fine, but I would have done things differently.
  • Jul 30, 2008, 09:43 AM
    Toolbeltgirl
    Thank you! I did in fact applied the drywall tape (plastic kind, with sticky back), then I applied the paste.

    Should I reaply the take, the paste, sand and reaply the base paint? Thk u.
  • Jul 30, 2008, 01:37 PM
    amricca
    You might want to put some drywall screws in around the cracked area before redoing that, it sounds like it may be moving around if the crack keeps re-appearing after all that.
  • Jul 30, 2008, 02:14 PM
    KISS
    What exact paste did you use?
    Let's see if you bought the right stuff first.

    It should not show. The repair using mesh tape will need about 12" to either side to get the featheredge right because of the increased thickness.

    It was suggested to me to indent the area somewhat with say by banging on 2 X 4 where the tape will sit into. The edges of panels are tapered, so you don't see the seams. This is why the indenting makes a lot of sense.

    Remove it totally and switch to a paper tape. Mud must go on first in that case, apply the tape and sand. The last sand should be done wet with wet or dry paper for a smooth surface.
  • Jul 31, 2008, 05:45 AM
    kbuchholtz
    Someone on this board posted this link about drywall finishing:

    Taping Drywall Step by Step Instructions - How To Tape Drywall

    It's not the way the pros would do it, but I used these methods to finish 3 ceilings in my home. It was more work, but for a novice I'm thrilled with the results. Patience and practice is the key here.

    Good luck.
  • Jul 31, 2008, 01:01 PM
    ballengerb1
    When done properly little or no sanding is required to joint compound a wall. Toolbelt needs to answer the question posted by KISS, what did you use? I do this all the time and get great results from 3 applications of mud. The first application is a 45 minute dry compound using a 6" knife to set the fiberg lass mesh tape. One hour later a do a second coat with a 10" knife making sure I am perfectly flush with the wall surface and ignoring any bubbles or streaks. The final coat is a pre-mixed compound that air drys, it is feathered and worked so that I can get a perfect finish with a damp sponge after a few hours. I would get some additional screws into your joints since you do have some small movement.

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