Inspected this home yesterday. Home built in 2000. Client is concerned with the cracks noted at interior walls located in the center of the home. From the attic, you can see how the installer used proper truss clips, did not nail the truss to the interior walls, but notice in the pic taken from the attic how the drywall for the interior wall surfacing travels above the top plate of the interior wall. This was typical for the trusses running ten feet or so from the exterior wall.
My thinking is that as the bottom chord of the truss swells and straightens out, it compresses the drywall resulting in the bulge you see in the photo below (taken with a flashlight to accentuate the shadows). In winter months one would expect the bottom chord being buried in insulation to remain dry, while the web and top chord swell from moisture in the attic causing the opposite effect, or the characteristic truss uplift. What is exhibited here is the opposite of this phenomenon. Note the picture showing the view from the exterior appears to show that the truss has raised and exposed a gap between the exterior stucco wall and the top plate.
Do you see any issues with this? It is easy to simply recommend a review by a structural engineer but I would like to hear from some experts as to what is happening here. There was some settling issues (doors out of square, tile countertop falling away from backsplash, etc.)
Thanks for looking!