What do i do with this anyone? is it possible to render it and paint? It looks beyond repair by replacing bricks as about 20% of wall is gone / cracked / crumbled. Any one help with ideas?
Any loose mortar must be removed and re-pointed. Painting / rendering over a poor base will not achieve anything. Also if you have any spalled bricks, just remove them and replace.
If a lot of bricks are spalled, it would be simliar to rebuild the wall. It is only a few courses high, so will not take long. Where the wall is 7 courses high, it looks like you only have a couple of spalled bricks - remove and replace, and rebuild the part that is 3 courses high and in bad condition.
Are they retaining beds or similar? As often that makes this happen much more quickly.
It is hard to say but it looks like it would probably have to be rebuilt as repairing it may just be throwing good money after bad. Using the correct frost rated bricks of course.
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