The size of the door opening will vary depending on the size of the door you plan to install.
Door frame and door installation.
Measure both the door and rough opening to make sure the door is the right size.
Shim between the side jambs and the studs to fill in the spaces between them.
They come in many different sizes and types of wood and follow the same basic installation instructions regardless of which.
Determine the size of the door opening.
To install a door jamb start by measuring the door frame and cutting the wood to size.
Door and frame combinations can be found in any home improvement store.
Next add glue to the end of 1 of your longer pieces of wood and attach a shorter piece to it.
The door frame should be slightly smaller than the opening it fits to allow for adjustments.
Slip shims under the side jamb until the head jamb is level.
Installing an exterior door that is insulated and made of steel can be heavy and cumbersome due to the weight of the materials.
A typical door opening is 2 inches 5 1 cm wider than the door size being installed to allow for the thickness of the jamb material and shims to plumb the jamb.