Terasun TSM — Cement board for wet rooms
🚿 Cement board for wet rooms
Cement Board for Wet Rooms and Shower Enclosures
Terasun TSM cement board is approved as a tile backing substrate in Mapei and Schönox wet room systems. The board itself provides moisture resistance (EN 12467 Category A) — it does not absorb water or degrade in persistently wet conditions. However, the board is not a waterproof barrier on its own: a waterproof tanking membrane must be applied over the board before tiling in shower and wet room applications.
Application
Moisture-resistant cement board substrate for wet rooms, shower enclosures, and water-exposed tile applications.
| Board | Terasun TSM · 12 mm |
| Standard | EN 12467 |
| Fire class | A1 |
| Moisture category | Category A — suitable for wet areas |
| Waterproofing system | Hydroproofing System - Compatible with professional waterproofing systems from leading manufacturers |
| Frame | Steel or timber studs |
| Finish | Ceramic tiles or natural stone |
| ETA | ETA 24/0895 |
Source: ETA 24/0895 · DoP TRS-20250610F · CE 1023-CPR-1565 P · EN 12467
Wet room performance characteristics
EN 12467 Category A — highest moisture classification for cement boards
Approved substrate in Mapei and Schönox wet room tile systems
Dimensionally stable — no swelling or warping in persistently wet conditions
Suitable for shower enclosures, wet room floors, and bathroom walls
Low mould risk — inorganic cement matrix provides no food for biological growth
Must be used with an approved waterproof tanking membrane before tiling
In wet room floor applications, TSM cement board over a concrete screed provides a stable, non-swelling substrate for the tanking membrane and tile finish. Unlike timber substrates or gypsum board, cement board does not flex, swell, or promote mould growth when exposed to persistent moisture.
Downloads for this System
4 documents · 0 available immediately
Installation Manual
Wet Room System Guide
Waterproofing Application Guide
European Technical Assessment