Humps in drywall seams
#1
09-18-18, 06:42 AM
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Humps in drywall seams
I need some help. So after finishing up the mudding. I notice there are humps in different areas of the seams. How do I go about fixing these areas
#2
09-18-18, 06:48 AM
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Hard to tell a whole lot from the pictures, but if you have air bubbles behind the tape you need to cut that out.
#3
09-18-18, 08:37 AM
Ya, if there are air bubbles behind the tape [places the tape isn't stuck] they must be cut out. No amount of mud over top of them will make them go away. If there isn't any bubbled up tape - you just need to feather the joint out further with more mud.
#4
09-18-18, 10:11 AM
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Bubbles are a problem which needs to be addressed but humps themselves are normal - drywall is not flat when finished but the humps are feathered out wide enough that the eye does not see them.
#5
09-18-18, 01:48 PM
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No bubbles behind them, look like speed bumps on the joints. So just more mud are either side of the hump and feather out?
#6
09-18-18, 02:20 PM
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I hate doing drywall seam mudding. Just when i start to get good at it, i'm done. It's an art IMO.
But yeah, a wide knife and feathered out if you have a bump already. In my experience, the trick is to fill the gap with minimal bump in the first place, which i think is what practiced seamsters do. Most of the pros i've hired (when i couldn't face doing a big job on my own) could do it in two steps. I.e., initial seam with minimal mud and then after dry, feather in. The really good peeps don't even sand (in my dreams).
But yeah, a wide knife and feathered out if you have a bump already. In my experience, the trick is to fill the gap with minimal bump in the first place, which i think is what practiced seamsters do. Most of the pros i've hired (when i couldn't face doing a big job on my own) could do it in two steps. I.e., initial seam with minimal mud and then after dry, feather in. The really good peeps don't even sand (in my dreams).
#8
09-19-18, 02:59 AM
On the top pic - you can't push in the tape at the seam? just want to verify it's not bubbled.
The bottom pic looks kind of rough, you might want to sand it a little first. Basically all you need to do is apply thin coats of mud which each coat wider than the previous. It generally takes 3 coats but I'd rather apply an extra coat than do any extra sanding.
The bottom pic looks kind of rough, you might want to sand it a little first. Basically all you need to do is apply thin coats of mud which each coat wider than the previous. It generally takes 3 coats but I'd rather apply an extra coat than do any extra sanding.
#9
09-20-18, 01:12 PM
I'm guessing that these are not the dimpled edges of the drywall? If that's the case, you may need to feather out another 12 - 15 inches or more on each side. Use a 12 inch knife to skim coat.
