Once both the top and bottom are secure the sides are secured based on whatever material is on the wall next to it.
How to frame a door in a concrete block wall.
In most cases one of those walls usually the one with the garage door itself will be concrete block.
Stack the shims on top of each other until the frame levels out.
Both the sleeve anchor and tapcon allow door frames to be placed in position leveled and plumbed before the anchor is inserted through the door frame.
The opening should be two inches wider than the door frame and about an inch taller in height.
If the wall is made of concrete blocks you need to fill the cavities in the blocks to provide a flat surface to which you can attach the frame.
Simply drill the hole in the base material with the door frame in place insert the concrete anchor and tighten.
Add another set of marks across the top of the frame to represent a steel lintel that will support the load above the door.
Here is a step by step tutorial on how to install a prehung exterior door frame in a concrete wall.
Slide the door frame into the concrete wall opening.
Examine the sides of the door opening in the wall to determine the material makeup of your foundation wall.
If it is not lift up the bottom of the frame and slide shims under the frame until it is level.
Place a level on the bottom of the frame and check to see if it is level.
The tutorial begins after the hole in the concrete has al.
If the wall is concrete you can proceed immediately to placing the frame.