Dry Rot (Serpula Lacrymans) is a brown rot. The fundamental difference between True Dry Rot and all the other wood rots is that it has the ability to seek out new timber to attack through inorganic ‘barriers’ such as brick walls, underneath concrete etc.
The fungus is also able to control the moisture levels in any new timber it finds, so if the moisture content in a new piece of timber is too low the fungus will transfer moisture from its source to allow the fungus to thrive. Correspondingly if a piece of timber is too wet (i.e. there is not enough free oxygen inside the cells of the timber) the fungus will extract moisture from the timber to allow it to ‘consume’ it.
Severe structural damage to timbers in buildings can result and specialist treatments are always required.
Dry Rot 13th August 2019