Then use a nail gun to secure the 2 pieces together before attaching the other side of the jamb in the same way.
Door frame and door installation.
Slip shims under the side jamb until the head jamb is level.
To install a door jamb start by measuring the door frame and cutting the wood to size.
Determine the size of the door opening.
The size of the door opening will vary depending on the size of the door you plan to install.
Door and frame combinations can be found in any home improvement store.
Shim between the side jambs and the studs to fill in the spaces between them.
Measure your door carefully and cut the opening to fit using a reciprocating saw.
The door frame should be slightly smaller than the opening it fits to allow for adjustments.
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.
Next add glue to the end of 1 of your longer pieces of wood and attach a shorter piece to it.
Measure both the door and rough opening to make sure the door is the right size.