Wet Rot is one of two main types of wood-rotting fungi found in buildings, the other being Dry Rot. All wood-rotting fungi require timbers to be exposed to prolonged wetting in order to proliferate.  The fungi obtain their food by breaking down of the wood cell walls, ultimately resulting in loss of strength and eventual collapse of the timber. Poor building design, plumbing faults or lack of maintenance etc. can lead to water penetration of the building, putting timber at risk of fungal attack.

Although there are many species of Wet Rot, the most common of which are Coniophora puteana and Fibroporia vaillantii, the remedial treatments required for all the species eradication is the same. Wet Rot affected timbers tend to show longitudinal cracking along the grain, and tend to adopt a dark brown appearance.

Coniophora Puteana

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This species is the commonest cause of decay where timbers have become subject to water contamination.  It will attack hardwoods as well as softwoods. Affected timbers will become darkened and show cracks along and across the grain. Newly affected timber shows a distinctive yellow colouration.

Fibroporia Vaillantii

This species is a common cause of rot to timbers exposed to damp conditions, and is capable of causing extensive damage.  Softwoods are generally the most prone to attack. Affected timber breaks up into cuboidal pieces and becomes darkened in colour.

Wet Rot Treatment

For more detailed information please see our Timber Treatment Specification.

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