Not exactly a woodworking question, but construction related.
I did some sheetrocking. It has been taped, mudded, and painted this last fall. A few of the inside corners are now buckling and stretching apart. What did I do wrong? And Is there a tool that can fix it or what can I do to fix it or prevent it?
I have heard of this before and seen that sometimes this gets better in the summer, but will bulge out again every winter.