Check the fit before installing a new door and enlarge the opening as necessary.
Putting a door in a garage wall.
Items you will need 36 inch pre hung entry door 2 2 x 4 x 81 inch studs 2 2 x 4 x 41 inch studs door casing electric miter saw skill saw jig saw screw gun hammer level measuring tape pencil carpenter s framing square door shims 2 inch deck screws 8d finish nails nail set wood putty.
Add another set of marks across the top of the frame to represent a steel lintel that will support the load above the door.
Once you are satisfied with the fit of the door remove it and apply several thick beads of silicone caulk to the bottom.
Mark this spot with a pencil and then repeat this process on the wall to the left of the garage door.
The opening should be two inches wider than the door frame and about an inch taller in height.
When you cut the doorway you may end up with voids where you cut the bricks especially with frogged bricks laid frog down.
However the door frame should cover up any inperfections.
Your garage will almost certainly be built with one of the above solid bricks do exist but are very unlikely to be used in a modern garage.
If you are going to install a door into the frame take into account the exact dimensions of the door when you make your measurements on the wall.
Caulk underneath the spots where the bottom of the jamb and brick moulding will be.
Before you make your first cut double check the measurements.
Run a stud finder across the wall perpendicular to the garage door on the right.
Use chalk to mark the areas where you want to cut through the brick.
Determine how tall and how wide you want the doorway to be.