Hello,
I have a garden retaining wall that seems to never dry out. The wall is constructed from bricks with three stretcher courses and then one header course repeated through its height. The wall is two courses deep with what looks like a thin cavity inbetweeen. Two thirds of the wall is below ground, the other third is above ground. At the bottom of the wall there are some spaces in the mortar, presumably weep holes.
What puzzles me is why is the whole wall damp, even the part that is totally above ground? Any moisture coming from the earth that is retained would I guess fall down the cavity and out the weep holes, so I can't believe it is coming from there.
Next to this garden wall is part of the house wall, this is dry, so not damp from rain penetration. So maybe the whole garden wall has rising damp, but why not the house wall?
And after reading this article I am doubtful that rising damp even exists:
Thanks,
Graham