The Medway Handyman wrote:
I need to 'join' two parallel brick walls - about 3' long & 5 courses high
and about 1" apart.

They are in a garden and one wall has a small gate post fixed to it. This
wall has partly fallen down & needs rebuilding, the other wall is as solid a
rock.

Plan A was to use steel frame ties to bond the two walls together & improve
the overall strength. Plan B could be to pour a wet concrete or mortar mix
into the 1" gap once the wall has been rebuilt or indeed as it's being
rebuilt. In the latter case I could PVA everything.

Any thoughts as to which method will be stronger? Would mortar be better
than concrete?


Use both!

Walls of solid material outside without ties will crack and cracks will
get water in and freezing water will split them. So the steel is a must.


I built a double wall of concrete block and brick. Its cracked in the
one place I didn't use ties..everywhere else there is a bow tie per
joint, and plenty between the two layers, which were filled with crap
mortar after I had finished each mix.