Have lived in this house 8 years. Finally redoing (full gut) bathroom this July. Just recently we have noticed horizontal cracks in the bathroom tile. Runs almost the entire width of the shower/tub enclosure back wall. We have had issues with crown molding separating ever since we installed a new HVAC system and we are considering adding a humidifier to the system. It appears that the material in the house may be drying out.
The discoloration in the grout is because it was wet. I've never seen grout like this until I moved here. We also have some separation of the back shower wall from the sides. But now that summer is here, and it is more humid, the cracks and separations are less noticeable.
I'm just concerned that this may be an issue with the new bathroom. Any thoughts?