After you cut through the mortar block wall you can then remove the bricks that have been cut out.
How to install a sliding glass door in an existing brick wall.
Then use a screwdriver to remove the screws which hold the frame of the sliding door to the wooden door frame.
This will prevent moisture from rotting out the door frame.
Use paintable silicone caulk around the exterior door casing.
This is an extra step that adds to the cost and it will probably have to be included in the plans you file to get the permit.
Use a putty knife to remove the excess after it dries.
Remove screws on the left right top and bottom sides of the sliding door.
Clean out all the mortar and seal around the edges with a mortar sealer.
Remove nails holding the door frame in place.
You can rent this saw.
In this video you will see the team of anthony randazzo sons construction install a sliding glass door in an existing brick wall.
Make sure to move the bricks to a different area so you will not be tripping over them while you install the door.
Center the frame within the opening and insert the expansion bolts for your existing wall anchors ewa anchors into the dimples on the frame.
Hammer the anchors into the dimpled sections of the frame until the head of the anchor is flush with the frame.
Cut out your inside framing.
Cover the foam insulation with trim and add a small amount of caulk to the visible joint between the trim and interior wall area.
Remove the studs and frame in the header.
Use expanding foam insulation to seal any gaps between the door frame and wall.
If the wall is load bearing you will have to construct a temporary wall to support weight before you can install the header.