Wet & Dry Rots Continued.

  • Wet Rot In Timber.

  • The cracking of wet rot affected timbers is different to the cracks found in timber affected by Dry rot.
  • Cracks are finer and found in a square pattern (cuboidal).
  • Timbers crumble easily when dried out.
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  • Wet rots are the most common type of wood rot.
  • Poria fungi (Fibroporia vaillantii & Poria placenta) are the usual type found in buildings and are sometime confused with dry rot.
  • The fruiting body of a Fibroporia fungi (pictured left) irregular white to yellow lumpy sheets with numerous minute pores.
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  • White Rot (Phellinus contiguus)

  • White rots are generally found in external joinery.

  • Wood becomes pale and fibrous in texture.

  • No cuboidal cracking and does not crumble.
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Wet & Dry Rot Treatment.


The treatment for both wet and dry rots are similar

  1. To locate and eliminate the source of moisture, timber will only rot if dampness is present and is      sustained for long periods.
  1. To promote rapid drying of the structure and increase ventilation to enclosed spaces, below                           floors etc.
  2. Find out extent of damage and in particular if any structural timbers are damaged. Structural timbers should be propped if necessary.
  3. In replacement works only use pre treated timbers.

This is where the treatments change.

Wet Rot.

  1. Remove rotten timbers and replace. Treat timbers which may remain damp for long periods of time with preservatives.
Dry Rot.

  1. Remove all rotten timber at least 500mm past the last sign of dry rot,  this includes strands, mycellium or fruiting bodies.
  2. To treat the walls contaminated with dry rot by using a fungicidal wall solution which will soak into the brickwork. Injection of the brickwork should spread 1 metre in all directions from outbreak.
  3. To treat all timbers within the vicinity of the dry rot, this will include any spores which have spread through the property.
  4. Do not retain any timbers which have been removed from the problem area as contamination could reoccur.
    5.

Tie Right Ltd / Wall Tie Replacement / Wood Boring Beetles / Wet & Dry Rots/Wet & Dry Rots Treatments
Rising & Penetrating Damp/ More Damp, Condensation & Treatments/ Structural Timber Replacement/Response Page