Do you understand the importance of vapor barrier on your insulation? There are many persons who are of the opinion that they know what vapor barrier is all about but the truth is that they have a vague idea which is, more often than not, ironies. Do you know that your house generates a lot of water vapor?
Your kitchen is a very rich source of water vapor. Every time you cook something on the stove, water evaporates and forms vapor. Despite the best ventilation and despite best efforts to remove the vapor from your house, a small portion is always left in the house. Considering the fact that the air pressure inside the house is always more than the pressure outside, the vapor is attracted outside.
It is not necessary for the vapor to pass through the windows alone. It may rise upwards towards the roof for the ceiling. In such a scenario, it is common for water vapor to get collected on the roof or in the walls. Once the temperature comes down, it condenses and converts into water. This waters an absorbed by the walls, ceilings and other parts of your house.
Since the insulation acts as a barrier between the wall and the outer surface, it is obvious that this insulation shall be the first to get moist because of water. Over the years, the accumulation of water vapor can lead to significant degradation of the quality of insulation. Not only will the energy efficiency of your house be affected, it will also set the fire safety track record of your house.
In such a scenario, you will have to make use of alternatives that will prevent the accumulation of water vapor. Further, you will have to protect the insulation from the damage that water causes. Once the insulation becomes wet, you will find it impossible to make it completely dry.
The only option left is to use vapor barriers that will prevent the vapor from coming in contact with the insulation material. You should try and push the collected water vapor towards the outside surface of the wall. This is because the surface can be scrapped and repainted. This will automatically result in extraction of wall vapor.
However, if you allow it to sink inside the wall, you are only creating scope for complications. Not only with energy efficiency of your house be affected, it will increase the damage that the fire may cause in event of a breakout.