The 30mm panel often offers the best price-performance ratio.
You have to weigh this up individually based on your circumstances.
The rule of thumb is: the more moisture, the thicker the panel. The thinner the panel, the less space you lose in your room.
Case studies
25mm board - Preventive for living spaces with potential moisture problems.
30mm board - For living spaces that need to be protected against (further) mold infestation and also need solid interior insulation.
50mm board - For larger rooms, old buildings, listed properties or basements.
