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 a garage door in a block wall.
We have an old cinder block garage shed building built in 1967 with 2 9 foot wide garage door openings.
It is a 2 6 stud wall and they placed 2 6 inside the entire jam making the opening 15 9 before trim.
These doors come in a solid frame that must be fit into a rough opening.
If you need to install a door in a masonry block wall here are some steps to get you started.
Cutting a hole in a masonry block wall is something that many people find is necessary if they want to add a new door.
Adding one course of block to a slab keeps the garage door framing farther up from the ground which may be necessary depending on the grade.
After your new door is installed remove the old stop material on the outside of the door and replace it with the type that has a rubber weatherstrip gasket available at home centers.
For doors with torsion springs located over the door spend the 50 or so to have a garage door professional release the tension.
I just had a garage built and am preparing to install my garage door.
To install a door in a concrete block wall you ll need to first create an opening for the door.
The most expensive option is laying several courses of blocks on top of frost footings and then resting the edges of the slab on the blocks.
I am treating the footing and the thickened edge as a single grade beam similar to as shown in this typical detail.
The second sheet is for a similar situation however in this case i am considering option 2 where the stem wall has been blocked out and a thickened edge slab spans the gap created by the garage door.
The task of installing the door itself is relatively simple while creating an opening in the wall is often a bit more challenging.
This is very common during a remodeling project where you want to finish off a basement or have a walk through door to the garage.
Tbe row of 6 blocks have a 2 x 10 on top and a 2 x 10 below them.
The easiest doors to install are pre hung doors.
These 9 foot openings are only supported by a makeshift header consisting of 6 cinder blocks sitting horizontally across the top of the opening.