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Old 03-30-2007, 02:19 PM   #1
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Drywall and bubbling


Hi guys....I know that there has been a few request for info on this topic but I am too worried that I would take that advice and mess up the job!!!

We have drywalled our basement. We applied the paper tape by dipping it in the watered down mudd so that all of the tape was coated. We applied it to the wall and then went over it with the knife to smooth it out and take of some of the excess mudd. We let that dry(24hrs) and the next day did light sanding to take off the bigger bumps or chunks that were left in some areas. Thought this would be easier so when we went to apply the first coat of mudd, it would go on smoother?!?...anyway, after applying a layer of mudd over the tape, letting that dry (24hrs)and sanded, we have found some bumps in the tape. A few spots I think we will have to re tape but in some of the other areas, it's only 3 or 4 inches. The bump/bubbles are few and far between but still there and noticeable to me.

Can I cut out the bubbles and do a patch tapping job or can I cut out the bubbles and just mudd the holes? I'm worried that I may have made the mudd to thin and that is why it didn't apply as well. Also, I have one spot where there is a slight crack where I assume the edge of the tape is. Do I have to redo that to? The small crack is maybe about an inch and the rest of the tapping on that line is fine. I really don't want to have to do the whole wall over again. What did I do wrong and what can I do to fix it???

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Old 03-30-2007, 02:30 PM   #2
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Alright, even professionals have this problem from time to time. Your problem is the mud was too thin and when you wiped the tape down you squeezed all the mud out from behind it which is why it is now bubbled.

A quick and easy fix is to take the corner of your drywall knife and carefully insert it behind the tape where the bubble is. The bubble may be in the center of the tape but with careful digging you can find the edge of the tape and pry it loose from the wall allowing you to access the bubble. Then just take the corner of the knife and dip it in some mud and apply it between the wall and tape then wipe the tape down again.

You will have to recoat over it again, maybe a spot coat to cover up the tape and get it caught back up with the rest of the drywall.

For the are where you said you can see the edge of the tape and it looks like it's cracked just do the same thing. Take your knife and carefully pull it away enoug you can get some mud behind it and wipe it back down.

I hope I explained it clearly enough but if you have any more questions just ask.

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Old 03-30-2007, 03:00 PM   #3
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Alright, even professionals have this problem from time to time. Your problem is the mud was too thin and when you wiped the tape down you squeezed all the mud out from behind it which is why it is now bubbled.
Sarahbear,

FWIW - I was thinking the exact same thing...
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Old 03-30-2007, 04:40 PM   #4
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It sounds like you didn't put any mud on the wall first and then embed the mudded tape on the wall. Correct me if I'm wrong.
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Old 03-30-2007, 04:46 PM   #5
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It sounds like you didn't put any mud on the wall first and then embed the mudded tape on the wall. Correct me if I'm wrong.
I think the poster was trying to apply the tape by using the bucket of compound..... like a 'banjo' set up....
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Old 03-30-2007, 04:51 PM   #6
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I think the poster was trying to apply the tape by using the bucket of compound..... like a 'banjo' set up....
Oh...never mind then
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Old 03-30-2007, 05:32 PM   #7
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Thanks guys!!! I will try that and hopefully I don't screw that up, otherwise I will be sure to write again!!

QUOTE] I think the poster was trying to apply the tape by using the bucket of compound..... like a 'banjo' set up.... [/QUOTE]

Yes...When we first started doing the drywall, I was told that this was the way to do it as opposed to applying mud then tape then mud...not sure why as that seemed to be a more cleaner way of doing it. I will have to try that next time!! I never knew that it had a name for it though, lol.
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Old 03-30-2007, 06:35 PM   #8
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FWIW - For readers who are unfamiliar with what a drywall 'banjo' is:

http://www.rd.com/content/openConten...ontentId=17843
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Old 04-01-2007, 08:07 PM   #9
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Just a fyi.....

I see you posted that you are sanding between coats....maybe I read it wrong.

But it is easier to not sand until the last coat is on.

Is it possible that in the sanding you have just got into the paper?

I like to get my coats as smooth as possible, and the next day take my putty knife and knock off any high spots, then mud again.

IF you get your 3 coats out good enough you should only have to sand it one time, and that should be minimal sanding if done correctly...


Just a fyi
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Old 04-02-2007, 11:32 AM   #10
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If you have a lot more tapes to do, go get yourself a Wet-Bunja.... this thing work fast and have great result... all the tapes I used it have perfect result... those I didn't use it, requires a lot more skill in order not to have bubbles....
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Old 04-02-2007, 06:50 PM   #11
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Thanks for all of your replies guys!! Alot of things to keep in mind and alot of helpful suggestions to guide me through the rest of our renos!

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