If your rough opening is made of cinder blocks it will be easiest to find a pre hung door that is smaller than your rough opening rather than trying to enlarge your door opening.
How to install steel door in concrete wall.
Learn how to properly install a entry door inside your basement where you have to mount it to concrete walls.
Installing an exterior door that is insulated and made of steel can be heavy and cumbersome due to the weight of the materials.
The task of installing the door itself is relatively simple while creating an opening in the wall is often a bit more challenging.
Measure both the door and rough opening to make sure the door is the right size.
Slide the frame back into the opening and press the hinge side of the door frame against the adjacent wall.
If not slide shims between the concrete wall and the frame.
Metal frames are typically installed before the brick or block is erected.
These doors come in a solid frame that must be fit into a rough opening.
Insert the shims at the top of the door behind the topmost hinge.
These blocks are durable and easy to install but can be difficult to modify or remove.
Place a level against the hinge side of the frame to verify whether it is exactly plumb.
To install a door in a concrete block wall you ll need to first create an opening for the door.
How to replace a metal door frame in a cinderblock wall.
If you choose to install a front door made of steel you will need a helper.
The easiest doors to install are pre hung doors.
When placing a door in an opening these doors must be fastened to the base material that is present in this location.
Most frequently this base material will be concrete brick or block and will require the use of special concrete fasteners door frames may range from solid wood to hollow steel.
For this project you will need concrete masonry.