The difference between wet rot and Dry rot is extremely important.

There are numerous species of wet rot but only one Dry rot fungi.

These can be confused as some wet rot species look very similar to Dry rot

Incorrect identification can result in the problem not being fully eradicated and re-occurring at a later date - or, on the other hand -
unnecessary work being carried out.

Dry Rot mycelium is able to grow through permeable bricks and mortar and thus effectively penetrate masonry. Strands subsequently form in the mycelium and enable the fungus to conduct water and nutrients over long distances. Growth will also travel behind plastered wall surfaces or along conduits that are embedded in the masonry. Once such growth has reached other damp timbers; for example, joist bearing ends, timber lintels, door and window frames, a further outbreak will develop.

Of all of the wood rotting fungus Dry Rot (Serpula lacrymans) is by far the most destructive to buildings and the most difficult to eradicate. It is essential that experience, expertise and great care are employed to ensure that any attack is properly and successfully dealt with.

Wet rot is a general term used to describe all but one of the fungal species responsible for timber decay. The majority of timber decay found in buildings is caused by species of wet rot fungi. Wet rot is caused by high moisture content in timbers coupled with poor ventilation. The extent of the attack to the timber will, therefore, be limited to those areas that contain sufficiently high moisture content.