I would like to install a door through a wall made of brick with cinder block
backing. What is the best way to cut through for the opening? How do I install
a support at the top so the brick/block structure remains stable?
As you note, the head of the opening must have a lintel installed.
The CMU (block) needs a lintel and the brick needs a lintel.
In addition, the opening must be flashed and weep holes added.
The jambs should be reinforced to take the loads from each lintel.
I suggest you read the Tech Notes section of the BIA web site carefully.
You need an expert mason that has a large saw with a blade that costs $300.
Look in the yellow pages for a mason who advertises that he specializes in
repairs. Needs a steel lentil, flashing and if you aren't careful the wall
could come down as you work. Not for a weekend warrier.
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