I have a job coming up where I need to cove the drywall at about a six in radius where it transitions from the wall to the ceiling. The USG website indicates (if I read it right) that their 1/4″ flexible drywall will flex to that degree. The cove will butt up against 5/8 wallboard on the wall and ceiling, so I suspect that we will run two layers of the flex and then mud the remaining 1/8 to level. The USG website also states that the flex should be attached every six inches, and I ‘m wondering how to go about that. Also I anticipate that the joints at the corners will be a challenge. Would like to hear from you if you have ever had to deal with this problem.
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New construction or a remodel? I'll presume a remodel since a lot of older homes were built like that. How to attatch it. Well, that depends. If there is lath behind it, then just hit that. I've found that it does a descent holding job. If you can get a stud, even the better.
Also, if you run into a hard time bending it, you could alway wet the back with a mist of water and allow it to soak in for, oh, 10-15 minutes and it will be more pliable. If it were me finishing it, I would probably just skim coat that section with a trowel. I would skim a section the width of a trowel then skip a section just less than the width of a trowel. Then repeat all of the way across the wall. When that coat dries, just go back and fill in the unhit spots.
Put a 3/8" screed strip on the ceiling and on the wall, fill it with plaster, and strike it off with a pie pan. Boda bing, boda boom, cheap beautiful ceiling cove. We do it all the time, clients love it and it's a real custom look.
Sometimes the simplest methods are the best.
Beautiful.
DRC