Lowest scope
Ask what other damp-proof detail stops soil moisture.
01 Barrier
Ground moisture · continuity · location
Plinth waterproofing helps stop ground moisture from moving into walls and finishes.
The expensive-looking product is not the whole answer. Waterproofing only works when the barrier is continuous and applied in the right place.
02 Options
The actual layer, surface preparation, laps and location matter more than a prestige word.
Ask what other damp-proof detail stops soil moisture.
Economical, but preparation and complete coverage matter.
Stronger continuous barrier; laps, corners and punctures need care.
May use cementitious, polymer-modified or membrane products. Ask for the exact product and layers.
03 Continuity
The meaningful lower end is “no dedicated waterproofing.” That is not automatically failure, but the project still needs a clear damp-proof strategy.
If nobody can explain what stops moisture at the plinth, that is the warning sign.
Where exactly does the barrier run?
04 Check
Both may resist moisture, but their form and detailing are different.
Choose the treatment by physical layer type.