| 摘要 |
<p>Water vapour control, which is arranged facing the inside of a building, comprising a first layer having a water vapour diffusion resistance (sd-value) of 2 - 5 meters diffusion-equivalent air space width, measured at a relative humidity of an atmosphere surrounding the layer of 30 - 50 %, and having a sd-value of <1 meters diffusion-equivalent air space width, measured at a relative humidity of 60 - 80%, and a second layer having a sd-value of >0.6 meters diffusion-equivalent air space width, measured at a relative humidity of 80 - 100 %.</p> |
