I have quite a few cracks in my drywall. They run along the drywall seams. They don't seem to affect every drywall seam, just some of them. Some seams that don't have cracks have bubbling of the drywall tape (underneath the paint, etc).
There are cracks in the walls in almost every single room in my house (3-bedroom split level townhouse). The house is 30 years old, so it's not a case of a new house settling. I had a home inspector in and he said the cause was poor mudding initially (when the house was built) combined with a very dry house (Canadian winters..VERY low humidity in the winter). I installed a humidifier into the furnace a few months back, but I still have new cracks forming in the drywall.
Any thoughts what could be causing them?
Or, any idea what the best way is to fix them?