Damp Proofing

I having my wall damp proofed from penetrating damp but it looks like they have left a section.

Anonymous user 23/02/2024 - 2.44 PM

Due to a recurring leak which has now been fixed i decided to have my walls damp proofed. They took the wall back to the brick work and have applied a render coat of washed sand and cement to a wood float and then applied a membrane of Triton TT55 or something similar. They are going to plaster over it but before i speak to them about it and in case they try to baffle me with science i wanted to ask for some advice. they have left an area of brick exposed in the top right corner near the ceiling, it hasn't been covered with any thing. The brick is still showing and looks like its crumbling. Now if they just re plaster over it, is there a chance the damp can come back through. I am unsure as to why they would damp proof the rest of the wall and not that section. Its part of that section which was most affected by the leak. Can anyone help? ps it comes with a 10 year guarantee.