Wet rot simply refers to the decay of timber caused by high moisture levels. This natural decay occurs when the moisture content in timber is about 30 percent to 50 percent. This is opposing to dry rot which only occurs as a result of a lower moisture content of about 20 percent. Naturally, a fungus is attracted to very damp wood, which it feeds off and in turn, destroying it. There are a number of fungus types, however the most common type is Coniophora puteana (also referred to as cellar fungus). In general, wet rot is usually confined to a localised damp area and does not spread which makes it a lot less destructive when compared to dry rot. However, if left untreated or totally ignored, wet rot can be just as destructive as dry rot and can greatly reduce the structural strength of the timber thereby causing a major structural damage in the process. So, what causes wet rot? Let’s take a look!
First and foremost, it must be stated that wet rot would be non-existent without a damp area to grow and thrive as wet spores are attracted to wet timber with a high level of moisture content. This moisture can be as a result of a number of issues which includes defective plumbing, leaking gutters, leaking roof, broken pipes, leaking washing machine or a leaking shower tray or bath. When the moisture a timber is exposed to is excessive, this offer the perfect environment for the growth of wet rot as it enables fungal spores to germinate and grow. They use the wet timber as a food source and eat it away, leading to a weakened wood and a compromised structural integrity.