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Old 11-21-2007, 10:35 PM   #1
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using pre-mixed mud


After the backsplash was torn off the wall, there was a thin layer of drywall left. I used the pre-mixed mud and put a thick coat on. The next day it cracked and it is still soft. Can I let it dry for one more day, , sand it down and apply more? If not, do I need to cut the piece of and replace with dry wall, then mud it? Do I have to use the fiberglass looking tape between the drywall before mudding?

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Old 11-22-2007, 08:16 AM   #2
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using pre-mixed mud


Hi Sil,

The fact is that you used a "Thick coat" of compound. The thicker you coat compound, the longer it takes to dry and the more likely it will "crack" when the moisture evaporates out of it, as it dries.

Let it continue to dry. When it is dry, sand it smooth and apply a couple more coats (allowing each coat to fully dry before applying the next). When applying the new coats, use the new compound to fill in the cracks. Sand and repeat until you're happy with the results.


Last edited by AtlanticWBConst.; 11-22-2007 at 08:19 AM.
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Old 11-22-2007, 09:32 AM   #3
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using pre-mixed mud


I've found that the setting type compound works better for thick fills. I forget what the rule is for paper and mesh tape with either kind of compound though. You have to use the correct combination.

Last edited by NateHanson; 11-22-2007 at 09:39 AM.
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Old 11-22-2007, 09:32 AM   #4
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using pre-mixed mud


I would remove all of the premix and redo wit a hotmud such as fastset 90. It has more adhesive in it and it sets without shrinkage.
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