Building a retaining wall is a tough job, but it's something most homeowners can handle, as long as you're able to do some heavy lifting and are willing to get dirty.
How To Core Fill An Existing Block Wall. A standard 8x8x16 2 core block contains about.25cf of open space. You might even consider bringing the wall out away from the block wall if you a concrete block is normally 8 inches high so that an 18 concrete block wall is 12 feet high.
Core filling a block wall without a Tailgater - YouTube from i.ytimg.com
I played around with the best angle to show the slope. One problem you should also fill the block on each side of the window to the floor to act as trimmers for your header you pour. Have reinforced existing walls as ron mentioned on multiple projects.
Steel lintels in concrete block walls are placed in the mortar between blocks, so the first step will be opening a space for the lintel itself.
A keystone block retaining wall can be a great landscaping feature in your place. (300 mm) behind the block. You can make up the difference by spending a little more to reinforce the blocks, a project that is still less expensive than using just poured concrete. One problem you should also fill the block on each side of the window to the floor to act as trimmers for your header you pour.
