The walls are brick, probably built in the 1920s, retaining about 1 metre in height of (clay) soil. The walls needs extensive repairs, and replacement might be the best option
One builder suggested one of the walls might be moving because of water damage due to poor drainage. The existing walls have what look like concrete drain pipes coming out at the front (above the pavement) but no water has come out of them for years. The builder mentioned weep holes and possibly putting in a pipe along the back of the wall.
I've Googled and now understand the function of weep holes and perforated pipes (although doesn't the pipe itself need to drain somewhere?). What else do I need to know to ensure the builder's suggestions will actually be suitable and effective for our particular wall? Or am I over-thinking this into a massive engineering project? As the wall is only retaining 1 metre height of soil will a like-for-like replacement wall with lots of weep holes along the bottom be OK?
Thanks in advance for any advice.