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Old 05-31-2010, 08:04 AM   #1
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Visible seam on fixed hole in ceiling?


Recently, we had a slow water leak in our second floor bathroom, which damaged our first floor kitchen. In order to remove all of the wet drywall and make sure the replacement piece of drywall would be aligned with studs, I took out a 2.5' x 3' section of drywall.

I've since replaced the drywall and taped it using self adhesive mesh tape. I also used drywall mud to cover the seam with two coats of mud and sanded the entire section down. Quite frankly I thought I did a pretty good job, but this morning I noticed a discernible seam on at least one side of the square.

When I ran my hand over the painted seam, I noticed a small hump. The mud I applied is only a few inches on either side of the seam. What do I need to do to fix this? I'm thinking I'll need to widen the seam area to blend everything better.

Also, I've been sanding the drywall mud after it's dried and it's making a huge mess. Is there another technique I can use for smoothing the mud out?

Thanks for your help.

Kelly





Last edited by kcrossley2; 05-31-2010 at 08:48 AM.
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Old 05-31-2010, 10:19 AM   #2
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Visible seam on fixed hole in ceiling?


You just started the taping---you need to 'feather' that seam out a LOT.

Get your 12 inch blade and widen the tape joint out to 12 inches--you may need to go to 24 to make it vanish.

Use a strong light -held in your hand to cast a shadow as you are sanding. ---Mike---

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Old 05-31-2010, 11:10 AM   #3
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Visible seam on fixed hole in ceiling?


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You just started the taping---you need to 'feather' that seam out a LOT.

Get your 12 inch blade and widen the tape joint out to 12 inches--you may need to go to 24 to make it vanish.

Use a strong light -held in your hand to cast a shadow as you are sanding. ---Mike---
Thanks Mike. Looks like a trip to HD is in order.
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Old 05-31-2010, 01:11 PM   #4
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Visible seam on fixed hole in ceiling?


yep mikes right we had the same problem in our kitchen and back bathroom and the guy we finally hired i watched and he feathered it out 24" almost ... spread out the mud that far on either side less as you go further out ... its gone now good luck
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Old 06-01-2010, 08:07 AM   #5
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Visible seam on fixed hole in ceiling?


Place a 12" mud knife on the high part and the ceiling on both sides of the hump to see where you need to fill in, no need to add to the hump itself anymore than necessary. Try to flex the mud knife a little on the side you are feathering so as not to leave a definite thick line of mud. You may need to drop the ring on the can light. If it has not been primed or painted yet, you might can sand that hump down a little to make it a little easier to deal with the can light ring.

P.S. I believe I would use light weight finishing mud ( blue lid) at this point. Maybe mix just a little bit of dawn in the mud to make a little more creamier and easy to work with.

Right before it sets up good, you might try sanding with a damp sponge to keep the dust down.

Last edited by boman47k; 06-01-2010 at 08:10 AM.
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Old 06-10-2010, 07:27 PM   #6
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Visible seam on fixed hole in ceiling?


Dawn in the mud?
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Old 06-10-2010, 09:38 PM   #7
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Visible seam on fixed hole in ceiling?


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Dawn in the mud?
Yes, but just a little bit if you use a pan like I do. Just enough to put a slight shine to the mud when you mix it in. Thats the way I try to gauge when I have enough. Just make it a little more creamier and easy to work. It still should not too readily readily drip off the knife. Kind of tricky to try and tell how much to use. It is kind of a learned by doing type thing.
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Old 06-10-2010, 09:53 PM   #8
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Visible seam on fixed hole in ceiling?


I gotta echo that, Jim. How can soap on the wall (or ceiling) not affect the paint?
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Old 06-10-2010, 10:05 PM   #9
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Visible seam on fixed hole in ceiling?


Speaking of paint, you might want to prime the area to be mudded. Some say mud does not always do well on a painted surface. I have never noticed this, but I do not mud everyday.

Many people use a little dawn detergent in their finish coat.

Do whatever works for you.
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Old 06-10-2010, 11:23 PM   #10
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Visible seam on fixed hole in ceiling?


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Originally Posted by boman47k View Post
Speaking of paint, you might want to prime the area to be mudded. Some say mud does not always do well on a painted surface. I have never noticed this, but I do not mud everyday.

Many people use a little dawn detergent in their finish coat.

Do whatever works for you.
What type of primer would you use Boman? I have never put primer over paint before i've mudded (haven't had any problems yet), but im certainly open to learning new things.
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Old 06-11-2010, 03:59 AM   #11
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Visible seam on fixed hole in ceiling?


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Originally Posted by boman47k View Post
Speaking of paint, you might want to prime the area to be mudded. Some say mud does not always do well on a painted surface. I have never noticed this, but I do not mud everyday.

Many people use a little dawn detergent in their finish coat.

Do whatever works for you.

I know and have worked with and or around hundreds of drywall finishers and this is the first I have ever heard of this.I would also wonder about PROPER primer and paint adhesion to JC with soap in it.
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Old 06-11-2010, 06:22 AM   #12
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Visible seam on fixed hole in ceiling?


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I have never put primer over paint before i've mudded (haven't had any problems yet), but im certainly open to learning new things.
I hope this isn't a requirement, because I didn't do it.
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Old 06-11-2010, 09:34 AM   #13
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Visible seam on fixed hole in ceiling?


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I hope this isn't a requirement, because I didn't do it.
It's not a requirement, I have never done it either

How did things work out kcrossley2 ?
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Old 06-11-2010, 09:40 AM   #14
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Visible seam on fixed hole in ceiling?


It's looking pretty good. I've been really busy lately, so I haven't had a chance to finish it up. I'm hoping I can wrap it up this weekend. I'll post some pictures once I'm done. Many thanks for all the help. I really appreciate it.

Best,
Kelly
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Old 06-11-2010, 10:40 PM   #15
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Visible seam on fixed hole in ceiling?


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What type of primer would you use Boman? I have never put primer over paint before i've mudded (haven't had any problems yet), but im certainly open to learning new things.
So far, I have not had any problems that I am aware of mudding over painted dw either, but I have read that some others think it causes problems. That is why I mentioned it.

I have also read that the mud suppliers do not like dawn deteregent being added and will not stand behind it if it comes out bad. That being said, I am not the only one to do it. I do not do much dw for a living, and I am not sure where I picked this up, but it works for me.

There have been a time or two when I wondered if I added too much and caused tiny pock holes in the mud from soap bubbles popping.

Do you guys use mud straight out of the bucket? I might for a bedding coat, according to how the particular bucket of mud is working.

I a m not crazy about spot priming either sometimes. If I do, I will sand the whole surface before I apply paint.

As far as what primer, I would feel comfortable with any good water based primer.

P.S. I have only used dawn in regular mud, not setting mud. I don't do enough dw work to argue the point. I just know it works for me, especially on the finish coat.


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