Drywall gap how to fix

hi,
just a quick question regarding drywall. I put drywall up in the ceiling everything is ok except for one section.
there is about a half inch / quarter inch gap for about two feet between two sheets of drywall.
what can i use to fill this gap, before i mud it? the joists are about 16 inches on centre. so i may have to cover 32 inches. any suggestions? what material?
Sam
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Get some fiberglass tape and put it in place tempoarily then cut the paper from the sheetrock so the fiberglass tape will be flush with the surface remove the tape and fill the crack with mud then place the tape where the paper waas on the sheetrock and use a wide knife to make the entire surface flush

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two
I am assuming that this gap is over a stud or joist. Meaning that it is only 1/2" deep with a solid backer behind it.
Just fill it in with drywall mud and allow it to dry before you tape. Use durobond or any quick setting mud if you don't want to wait the 3 days for a 1/2" of mud to dry.
Same principals apply if no backer substrate is available but it may take more than one coat.
Either way, no big deal happens all the time.
Colbyt
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you can buy metal inside corner bead from HD. just mud in place

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