By using a tanking system before you tile will make sure that all your plasterboard will not rot. It is so easy to apply and is so inexpensive that it should be a must for any new bathroom or wetroom!.
Weber.System Protect,Under-Tile Tanking System
• Under-tile tanking system for protecting water sensitive substrates, such as plaster and plasterboard, from exposure to water
• Recommended for showers, bathrooms ect.
• East to use, apply with a roller
• System includes a high performance joint reinforcing tape to protect against movement in corners ect.
Supplied as 7kg membrane & tape or as 5m2 shower kit available from Tiletown UK