Vapour tight systems are the most common solution used on the market today, usually in the form of thermal laminates – insulated plaster board.
The key factor as the title suggests is, that the wall must be Vapour tight which simply means that the system you choose must stop hot vapour transferring from the warm side to the cold side of the insulation.
Failure to address this key issue will lead to the hot vapour condensing on the cold wall and turning to water.
Over time this reduce the effectiveness of the insulation and also lead to mould and damage to the fabric of the building will occur.
Non breathable walls cannot cope naturally with the movement of water. At Enviroform Solutions we have build specific products that are designed to address the issues that arise due to the type of walls that you have in your building.