Wet & Dry Rot
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Wet rot is a fungus that attacks timber in buildings, and is a serious form of timber decay. Wet rot can attack all kinds of timber, old or new. Wet rot occurs when there are high levels of moisture, damp or condensation in a building, combined with a lack of ventilation.
Wet rot needs high levels of moisture in a building for spores to germinate. Unlike dry rot growth will cease once moisture is removed and does not have the ability to spread. Wet rot fungi is usually found in damp basements, under floors and in skirting boards.
Sometimes it is not possible to easily distinguish between the many species of wet rot and in practice it is not really necessary because the same remedial measures are required for all of them. The most important thing is to distinguish between dry rot and wet rot.
Wet rot is found in timber that becomes and remains wet. It's not as simple as just replacing the affected timber, the source of water must also be fixed.