Hi, as the title says, I'm trying to achieve straight 90° at the end of a wall. The wall is an entrance to the kitchen. I had to cut the lightweight concrete wall and then added plasterboard to it. Some carpenter friends came by and immediately noticed that it wasn't quite straight. It's an entrance to the kitchen from the hallway, so it's the first thing guests will see. You want to get this as perfect as possible. I should add that aluminum corner protectors will be mounted, and everything will be skim-coated. My idea was to attach two straight planks and even it out with filler. Is that a good idea? What do you think?
All advice and tips are welcome 😛