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Old building renovation  Building physics | Moisture protection | Construction | Ecologically building | Imprint

2.3. The influx of light and air-replacement of the growth from the dry rot

Fungi are chlorophyll-free and don't require any light, with what this partially hinders, for its growth works. A certain light-volume is required for the formation of the fruit-bodies. (G. Langendorf)

Fungus-type Increase after days in mm
  Sunlightdiffuse light
Serpula lacrimans (real dry rot) 0 25
Coniophora puteana (Cellar-sponge) 2580
Antrodia vaillantii (White pore-sponge) 11 25

It becomes clear with it why a fungus-affection remains relatively long undetected. They prefer darker and masked premises. Since the real dry rot manages on relatively inferior humidity opposite the other fungus-types, its affection usually is recognizable first with the settlement of a bigger damage. Lie a sufficient continuous dampness-supply, how for example defective heater or water pipe, so the cellar-sponge causes an essentially bigger damage in the same time.

Fungi this the light is abandoned what means also a moisture-replacement on the other hand is subject to inevitably also an air-replacement. Fungi produce humidity named already like in the point, a part of the required water even. By the air, the moisture is taken away and is reduced the metabolism-process with it. The meaning of the draft and the desiccation connected with it is emphasized Jennings and Bravery, Schmidt and others by different authors, like big.

It was observed that joints and small openings were locked by the mycelium to cavities, in which it grew dry rot. At wall-surfaces and particularly at openings and the atmospheric humidity is higher than in the remaining space behind it. The dew-water-formation partially also occurs. This higher moisture-offer could favor this growth.

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