Hello.
All the window trims in my house are only glued, which has now resulted in the trims coming loose and cracks forming (see image). How do I best solve this? Nailing the trims is the idea, to then putty. But is that enough? It's a wooden house built in 2012.

Crack along the window frame of a wooden house built in 2012, showing detached moldings and a snowy outdoor view.
 
  • Crack in the interior wall near the window frame, with shadow visible on the wall, indicating detachment and damage to the window trimming.
Is it plastered into the recess behind the trim? It looks like it may have cracked in the corner of the two boards if that's the case. It's impossible to answer your question without knowing more about the construction, but I don't think the trim's fastening has much to do with it, and if you fill it, it will probably come off again.
 
Hello.
From what I've seen and believe, it's drywall panels that have torn apart and the crack has formed. The casings themselves are glued directly to the frame that goes around the windows.
 
Well, first of all, it is not a lining but rather a smyg. It is set with glue, putty, and soft-jointed against the gypsum, that soft joint has now come loose due to movements. The gypsum is not torn.
 
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Trähus40
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Hi. Yes, I need help with a smyg. Unfortunately, it is not the soft seal (soft seal has not been used at all). I think it looks like a piece has come loose from the plasterboard. The cracks extend to different lengths depending on the window...
Cracks appearing on a drywall corner near a window, indicating separation from the gypsum board.

Crack on a wall near a window, possibly due to drywall separation. The damage varies in extent depending on the window.
 
It cracks at the edge where the plaster ends and then the rest is filled with filler.
 
Okay, how do you think I should address it and prevent it from happening again?
 
I would start by securing the trim properly with wood screws or brads into the stud. Then, cut away what has come loose from the drywall, apply a good paintable caulk between the trim and drywall edge, and then paint over it. You can apply some spackle first if you want, but the problem here is that spackle was applied directly against the trim.
 
Thanks for the response. Now I know how to proceed.
 
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