Do you have to use shims when installing a door?
Do you have to use shims when installing a door? If the rough openings are sized 2 inches larger than the net door size, and if the door frame is roughly centered in the opening, the remaining gaps between the jambs and the framing are only 1/4 inch to 3/8 inch wide. However, if you're installing a solid-core door, whether it's prehung or not, always use shims. How do you use shims? How to Use Shims. Once a door or window is seated into the opening, place shims in any gaps between the window or door casing and the framed...