Strips afterwards

[Geps]

Hello

I have covered a door with plasterboard that I then plastered over. Unfortunately, we didn't apply strips over the seams, and it has now started to crack. It is now about 2-3 cm thick with mortar + plaster over the plasterboards (it was required to make it even with the wall). My question is: Can I apply strips over the cracks afterwards and then plaster a thin layer over it, or is it too late? Do I have to get down all the way to the plasterboards for the strips to work?

Thanks in advance.

Regards, Geps

 

[falkn]

You can add strips afterward. Preferably self-adhesive fiberglass to make it as thin as possible. Then you spackle over this and spread it out. You will have to lay backs 30-40 cm over each strip. The alternative is to put microlit over the entire surface and repaint.

 

[AndersMalmgren]

Why didn't you use double layers of plasterboard or OSB underneath, or anything else. The idea is not to apply regular filler so thickly; with cement-based filler like plaster, it's fine.

Edit: Ah, it says plaster + filler

 

[falkn]

Why didn't you use double layers of gypsum or an OSB underneath or anything else? The idea is not to apply such a thick layer of regular filler; with cement-based filler like gypsum plaster, it's fine.

Edit: Ah, it says mortar + filler

Gypsum plaster is not cement-based, is it? Regardless, cracks occur at the joints no matter what because they consist of different materials. That's why you use a strip or something similar.

 

[AndersMalmgren]

Of course, tape should be used, but I don't think applying it so thickly is okay. However, it now seems he used a different type of compound, so that's fine. I would have probably done it differently, though. I did the same thing in my apartment. Framed with a 45mm stud in the hole and then OSB and plasterboard on both sides, then tape over the joint.

edit: No okay, but just like cement-based ones, it can be plastered thicker than filler and is also approved for tiles and ceramics, which regular filler is not. But now it's a non-issue since he didn't use filler.