wedge shaped seams appearing in casing joints
I trimmed several windows and doors in my house about 6 months ago. When I did the work, the casing joints matched up perfectly and were all glued and nailed in place. Over the past few months, there have been wedge shaped seams developing on some of the joints. Some of them have reached an 1/8" wide on the open end of the joint whereas the other end of those same joints is still tight. Does anyone know what is causing this to happen or how to avoid it from happening when I do more door/window casing work? Please, any help would be great. I now have to go back and re-do all of the ones that have this issue. about 4 out of 10.