Timeline for Crack in new drywall joint

Current License: CC BY-SA 4.0

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Jun 4 '18 at 22:44 comment added Håvard Geithus Please consider making the answer self-containing for future visitors :)
Jun 4 '18 at 22:32 comment added Håvard Geithus So this is what I ended up doing. I used a 'wallpaper cutting knife' and cut in behind the tape to get it off. After removed for the cracked area, I sanded down using crude sandpaper (60 or 80) to give some room for the new tape. I made sure there were no loose bits in the area. Then vacuumed and used a dry microfiber cloth to brush away any particles. Then put another tape coat on there. Took about 30 minutes.
Jun 4 '18 at 9:16 comment added Håvard Geithus I'm thinking we scrape off / dig into the cracked part to remove loose bits. Then mud and tape again. Make it a really wide joint on top of the old one. What do you think?
Jun 4 '18 at 7:47 history answered Lee Sam CC BY-SA 4.0