Vapor barrier membrane and waterproof breathable membrane are both effective protective membranes. These two protective membranes have very good functions and are widely used in the industrial field. However, these two protective membranes are not the same, and there are still differences between them. So, what is the difference between the two?

The way of action is different: the waterproof and breathable membrane is mainly a functional material laid on top of the insulation layer. The function of this material is In order to prevent outdoor rainwater from entering the insulation layer. However, the vapor barrier membrane is a protective membrane used as a vapor barrier layer. This protective membrane is usually under the thermal insulation layer. One acts on the top of the insulation layer, and the other acts on the bottom of the insulation layer, so the methods of action are different.

The basic functions are different: the main function of the waterproof and breathable membrane is to prevent rainwater from entering the insulation layer, and it can also discharge some moisture generated in the insulation layer to the outside, allowing the insulation to The layer stays dry for a long time. However, the waterproof and breathable membrane functions as a moisture-proof and vapor-proof membrane, which can effectively prevent indoor moisture from penetrating into the insulation layer.

The basic impacts are different: the waterproof and breathable membrane has a strong protective effect on the insulation layer, so it will not affect the service life of the insulation layer. However, the insulation effect of the vapor barrier membrane is different, which will affect the service life of the insulation layer.

To sum up, waterproof breathable membranes and vapor barrier membranes are not exactly the same. There are certain differences, so you must pay special attention when using them. The above three basic differences are the biggest differences between waterproof breathable membranes and vapor barrier membranes, so be sure to pay attention to them.