What is a vapor barrier?

You have probably already asked yourself what a vapor barrier is and what it is supposed to do. After all, there is seldom steam in the house unless you have a sauna.

This is how the vapor barrier works

• Even if you can't see it, condensation is created by evaporation almost everywhere in the house.
• But also through that roof Water penetrating unnoticed can cause damage. The roof doesn't even have to be defective here; water finds its way through the smallest cracks.
• The vapor barrier is intended to prevent the insulation layer under your roof from becoming damp and the formation of mold.
• So is between the "warm" inside and the insulation A thick film is attached to prevent condensation from depositing in the insulation material.


Vapor barrier or vapor barrier - this is how you weigh the pros and cons

Anyone who wants to build or renovate a house is quickly faced with the question of ...

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• A vapor barrier, on the other hand, consists of material that is semi-permeable and allows condensed water that has penetrated at certain points to escape again.

What is the advantage of a vapor barrier

• Since vapor barriers become ineffective as soon as there is even a hole in the film, you will mostly see vapor barriers by now.
• If you lay a cable or a socket in a barrier or damage the film in any other way, condensation can penetrate unhindered from the rooms and settle in the insulation material. This quickly leads to mold growth.
• With a vapor barrier, on the other hand, the moisture that has penetrated is diverted.
• Newer vapor barriers also adapt to the internal temperature and thus make it more difficult for moist room air to penetrate the insulation material.

If you want to keep it simple, a closed pressure cooker is a working one Vapor barrier, as soon as you open the vent, your vapor barrier is broken and damp air can enter step out.