5 tips to help you forget about condensation forever. According to these rules, our grandfathers built eternal walls

Today I want to raise the topic of condensation in the house and talk about its various manifestations. This topic is interesting because it will later make it possible to take into account a number of points and avoid some problems.

For example, such things as the choice of wall materials, the choice of insulation material, many questions about engineering systems in the house, improving the comfort in the house, etc. are associated with condensation. And in principle, condensation is an unwanted guest in the houseif not managed correctly!

I have a positive attitude to the theoretical part of this question, to online calculations and calculators. But our ancestors managed to create interesting resilient systems without taking advantage of all of this. Because they perfectly understood the nature of condensation, they had their own special knowledge and technologies.

I will share with you 5 conclusions from my experience, from the experience of our grandfathers who help me in construction.

They are not spelled out in SNIPs, but they are effective and efficient. These rules apply mainly to external wall structures and attic floors.

1. It is always necessary to limit the ingress of moisture into the wall.
2. The dew point should be located as close to the outside of the wall as possible. Many experts recommend removing the condensation zone outside the wall supporting structure into the insulation plane. But these guidelines are more inadequate than helpful.
3. It is always necessary to provide for a free outlet of steam from the walls to the outside.
4. Ensure that there is no waterlogged air in the house or individual rooms. High humidity automatically violates rule # 1 and leads to violation of rule # 2.
5. We exclude through blowing of the outer perimeter of the house. This is a very critical moment from the point of view of a comfortable stay in the house, as it also entails increased heat loss.

Now let's put these rules into practice. For example:

• Why would it be a mistake to use façade trim with poor vapor permeability on a vapor permeable wall? This violates rule 3, which leads to a violation of rule 2.
• Why is it correct to decorate a bathroom with full height ceramic tiles? In addition, additional ventilation must be provided. Thus, we will fulfill conditions 1 and 4, which will lead to the fulfillment of rules 2 and 3 with the correct facade decoration.
• Why do you need high-quality waterproofing between the foundation and the walls of the house? Because by this we fulfill rule number 1 - we limit the flow of moisture into the walls.

To summarize, we can say that the best wall from the point of view of condensate management will be the one that is denser, of higher quality on the inside, does not pass through a large volume of steam and moisture inside the wall, and on the outside - the wall is insulated, and at the same time the insulation layer does not block the free exit of steam out. There should be exactly external insulation, because the internal one violates a number of rules. And the wall must be airtight - without blowing through.

There are a lot of other issues related to condensate that can be analyzed. You can talk about this endlessly. If you wish, we can continue in the following publications! Leave your questions about condensation in the comments!

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