David Pearson wrote:
G'day.

There are various holes that I need to fix. One of them
is in my knowledge.

Hole Number 1 is in a concrete-block wall. I can see
how to start filling it up with blocks and mortar, starting
from the bottom. But how do I fill the final gap at the top?
When I push the block (or chopped-down block) into
this final hole, will this not just push the mortar through
into the cavity?

to some extent yes. Then you fill up as required. Or you can lay mortat
under the block, not on top, place, then fil the top gap.


NT