Tadelakt shower plaster specification — before you approve a supplier

Tadelakt is a beautiful shower-wall finish, but it is not a casual paint substitute. The supplier must be able to explain the substrate, coat sequence, polishing tool, soap finish and cure window before the buyer signs off.

Where tadelakt is appropriate

Tadelakt is best for shower walls, hammams, spa rooms, curved benches, built-in sinks and sculptural wet-zone features. It should be applied over a compatible mineral base, not directly over weak drywall or flexible boards without the correct build-up.

The supplier checklist

Ask for these items before approving a tadelakt supplier:

1. TDS and SDS for base coat, finish coat and soap finish.
2. Substrate acceptance list and rejected-substrate list.
3. Polishing tool recommendation and replacement plan.
4. Cure-time statement before direct water contact.
5. Annual maintenance note for re-soaping or refresh.
6. Batch label, sample-board record and retained sample policy.

Common risk points

The highest-risk failures are early water exposure, rushed polishing, incompatible substrate, missed soap saponification and unclear maintenance responsibility. For hotels and spas, these risks should be written into the project method statement so the installer, operator and buyer share the same expectation.

CALMURA project support

CALMURA supplies tadelakt with the matching soap finish, application note, sample-board record, packing list and document pack. For first-time projects, we recommend a mock-up wall before full wet-zone release.