Removed some lining paper as part of our redecoration job which uncovered a vertical crack approx 3-5mm in width, running from the bottom of the uPVC window to the skirting board. The window extends to roughly a foot past the patio doors below which is where the crack is, and is in the middle of the house coming from a tip window.
The crack also appears on the outside of the house but doesn't appear to run to the bottom of the house, internally or externally and seems to taper off.
The wallpaper covering the crack behind wasn't coming away, there aren't cracks elsewhere and none of the doors are sticking aside from where the patio door directly below.
Hoping to get an idea of causes and trades that might be able to help
