The roof is coming along, just one more layer of drywall now.
But I would need advice on how to fill the holes that were made in the drywall for the angle irons? The drywall layer is visible from the room so they need fixing. They have to be filled, covering with molding won't work as the room needs to be soundproof. Regular filler or some type of putty? It needs to adhere to OSB, metal, and drywall.
I'm also wondering if regular fine filler adheres to acrylic sealant? I have sealed between the drywall sheets but need to putty for the final finish.
That's right, joint between the boards. In hindsight, it seems less thought-out, but at the time the idea was just to make the room as tight as possible. So, is it possible to putty on top?
I would just plaster over it. But let it dry for a long time between layers. Such thick plaster shrinks quite a bit. Fitting in a piece of drywall likely saves calendar time but probably requires a bit more work time.
Fill the hole with gypsum-based filler, such as Ardex Ardumur 828, or equivalent. Fill the joints with paper tape. First, apply filler, then paper tape into the wet filler, and then fill over it. It is difficult the first few times you do it.
