Rot treatment

We are approved Sovereign Rot Treatment contractors and offer guarantees on all our work.

Dry Rot 

Dry Rot is a fungus that attacks building timbers. It can damage both old and new timbers. This fungal decay, together is the most serious form of damage to timbers in buildings.

Dry Rot can spread rapidly through brickwork and concrete if it is not treated, and can cause widespread structural damage. ‘Serpula lacrymans’, the true dry rot fungus thrives in the dark and in unventilated areas. It often grows behind panels and under floors.

Wet Rot

Wet Rot is another fungal ‘infection’ of timber. Again it affects the structural strength of timber and it can damage a building. Compared with dry rot, wet rot is not so serious, requires a higher timber moisture content, and does not travel through masonry. Growth ends when the dampness is removed. 

Wet Rot decay happens when there are very damp conditions, with high levels of moisture and poor ventilation.

Wet Rot generally requires higher timber moisture content than dry rot, generally over 30%. There are several wet rot fungi including:

  • Cellar fungus (Coniophora puteana) usually found in damp basements, under floors and in skirting boards. Causes timber to darken and produce cracking both along and across the grain of the wood. It prefers very damp conditions in areas like basements, leaking roofs and wood floors where there is insufficient ventilation.

  • Mine fungus (Poria vaillantii) causes wood to shrink and split into cuboidal sectors. The strands are white, sometimes fern-like.

  • Phellinus contiguous which bleaches wood, which becomes fibrous and stringy. This is a common type of decay in external joinery timbers such as door and window frames.