Drywall taping question
It could be that who ever taped it didn't get enough mud under the tape, but it could also be that you have an edge that has been fractured. In other words damage from handling. Usually a good drywaller will look for problems in the sheetrock and fix them as they are taping. But it is impossible to find everything. So be carefull, if you retape it and the damage is still there, it will look just like it does now. If you are going to work on it, take a knife and cut into the bubble. If tape comes off showing that it hadn't been mudded, like it had and air pocket, then you tear the tape off and retape, always getting rid of any loose material. If it is damaged sheetrock, when you cut into it, the gysum with fall out in powder, and pieces. Then you have to cut out all loose material, prefill and retape. There is one more thing that it can be and that is if the bubble has strength and integrity, then it is a factory problem that made its way through the inspection process. In that case you have to split the seam with at least a 12" knife, meaning passes of mud on each side of the tape to try and get the bump to hide. Trying to round it off so it isn't so noticeable.
Last edited by redmanblackdog; 03-26-2011 at 02:37 PM.