The showy discoloration and loss of weight as well as solidity from until 98 per cent shows imperfecti the activity of Ascomyceten and fungi. The surface becomes merely on that occasion, not deeper than 1 mm, damaged. In rips, rain water can accumulate and for example can stretch and can favor the danger and expansion of the molds respectively so. The so before-damaged wood favors an attack against wood-destructive fungi (Basidiomyceten). Also the chipboards becoming per classification after corresponding moisture-impact attacked. (The claim lately to be read of a construction-material-market, that V 100 chipboards are employable into moist-spaces, can only be classified as wrong.) They are allowed to at most with a wood-dampness of u = 18 per cent is incriminated. For Fiberboards if the maximum value amounts to Max. u = 12 per cent.  also newly with, for example fluoride-containing, wood-preventatives impregnated lumber (picture 6.3.1).) just as durchfeuchtetes wood (picture 6.3.2).) it is attacked by molds at the surface, if improperly these or camped under air-conclusion (metal leaf) or is obstructed respectively. The wood-dampness is above the fiber-repletion and the optimum is with a pH of 4,5-6,5. The wood changes color gray-bluish or black. The Myzel is usually green until blue-green, for example from Penicillium spp. or Trichoderma viride, or black (Aspergillus Niger). 
A mold-growth on wood is to be restored only very heavily, and the wood must usually be disposed of.  a fight takes place through a desiccation.  there the affection normally not more deeply than 0,5 mm is enough, this can be gotten rid of the surface through sanding. Since leads also dead fungus-material (spores and Myzel) to the health endangering, a respiratory protection-mask is to be carried and to avoid a dust-distribution. In the picture 6.3.3. if the complete faulty-base is intensively predominant after a water pipe-damage through Penicillium spp for a wood-great commissure-cover. or Trichoderma viride attack. With the financial recovery, the Schüttung and all wood-parts (faulty-base-boards, crests and Dielung) were developed as far as on the cleaned blanket-great commissures and of were disposed. The remained wood-great commissures were impregnated as prevention with an attested by a notary fungus-unfavorable wood-preventative of the DIBt (German institute for construction-technology).
Form 6.3.3.: Firm green mold-affection against a Sparschalung in the faulty-base of a wood-great commissure-cover after a management-water damage
... One of the most known optical damages to wood-sharing, like window frames, doors, balconies etc.. if the "Blue-coloring" is. ...Here, the mildew-rottenness should still be accepted shortly. Opposite the wood-destructions through the basidiums (pillar-fungi), the mildew-rottenness always originates from the surface and is usually only few millimeters deeply, picture 6.3.6. and 6.3.7.)  the mildew-rottenness is favored by a high humidity at the wood-surface, for example the weather-thighs of the window menu. The Chaetomium-Arten are firm Cellulose-destroyers. Some types, as the Chaetomium globosum and Chaetomium cochloides perfoliate in obstructed or unverbautem wood the secondary-walls of the wood-cells and causes the so-called mildew-rottenness. Also the kinds Ascotricha and Lophotrichus belong to this. ...