Surveyors Fotofile: Wet rots

1 March 2012

In the course of their everyday work our surveyors come across many different types of decay that attack the timbers of properties both old and new. Here we have some pictures of some less common wet rots in the form of brown and white rot.

Brown Rot (Paxillus panuoides)

This brown rot targets very wet soft woods and spreads over damp timbers. Brown rots destroy cellulose in the timber and cause a darkening of the decayed timber. The photos below show the brown rot in situ and the fruiting body in greater detail.

Brown rot type Paxillus panuoides - fruiting bodyCLose up of Paxillus panuoides fruiting bodyWhite Rot (Donkioporia expansa)

This rot feeds on hardwoods such as oak and digests cellulose and lignin within the timber. This results in a lightening of the decayed timber. All species of wet rot require relatively high moisture levels in timber (above 30%) for growth. Unlike dry rot, wet rots will be restricted to areas where there is a high moisture content.

White rot - Donkioporia expansa

Action to take if you believe you have wet rot

Wet rot treatment can usually be carried out by firstly removing the moisture source and secondly drying out the surrounding fabric. This prevents further spread of the rot.  Where any affected timber has lost its strength the timber needs to be replaced with new timber that is treated against the potential germination of wet rot spores. This ensures the structural integrity of the building. Specialist wet rot treatment is then required to finish off the process.  This generally involves eradication through chemical spray and other wet rot treatments. To arrange a survey for identifying the signs of wet rot call our team on 0800 288 8660 or complete our on-line wet rot survey request form.