Dear G. Rome,
Xypex chemistry reacts with the various materials that make up a hardened Portland cement matrix. As you are aware, brick is not a Portland cement based material and as such Xypex
will not react and create a crystal structure in the brick. Assuming the mortar is Portland cement based Xypex would likely assist in improving its resistance to rising damp but with
the large area being made up of soft brick I doubt the improvement in the mortar would stop the rising damp to the extent of fixing the problem.
If you wanted to try it I would suggest drilling in only along the bottom mortar line and injecting / installing Xypex Concentrate in a line of holes in the mortar. Space the holes about 200 mm apart. This might work as it will improve the waterproofness of the mortar line but as it is only a 12 – 15 mm line of mortar it is still not a very thick barrier and as such
may not accomplish much.
Good luck with this interesting issue.
Posted on 24 Nov 2016