A couple of questions.
1. Doesn't a DPC make a weakness in the wall, or is the material such
that the mortar keys into it for a good bond ?
2. Is it better to use a waterproofed mortar and blue bricks ?
3. When inserting a DPC, is the joint thickness between courses usually
still 10mm, or is it thicker ? I need this for the plans.
TIA,
Simon.