The dew point
About the dew point
I often hear comments from builders about the dew point in the wall. I won’t go into details, I’ll just say that the dew point itself has no practical significance. And it is only important in combination with the real operational performance of housing. The immediate moistening of the wall after drying is affected by the temperature and humidity of the air in the house and outside. In order not to be unfounded, I present data from a professional program for calculating heating engineering and wall humidification within the given parameters. I deliberately took values wider than normal to demonstrate the lack of moisture in the wall even in such extreme conditions. In picture 1 you can see an area of possible condensation, from the side of the room. I also talk about this all the time. The wall gets wet from the inside, not the outside.As can be seen from picture 2, humidification does not occur and cannot occur at all, due to the lack of intersection of real temperature and humidity indicators with calculated indicators, that same dew point.If real indicators change for even worse, the dew point will also shift downward, maintaining the absence of prerequisites for the wall to become waterlogged. I hope this proof will finally convince skeptics of the need to dry the walls and the absence of prerequisites for their subsequent wetting. Naturally, good ventilation that removes moisture from the room will need to be installed, but this is simple and cheap.