Dry Rot Guide

Serpula lacrymans

Appearance

Image of dry rot damage from Rentokil
  • Mycellium: silky white sheet and cotton wool-like cushions with lilac yellow tinges.
  • Fungal strands are white to grey and brittle when dry.
  • Sporophore: fleshy pancake or bracket - rusty red when mature.
  • Spores: bulk spores are a reddish brown dust.

Lifecycle

  • Decay fungi are living organisms which send minute threads called hyphae through damp wood, taking their food from the wood as they grow.

Habits

  • It most often occurs in damp timber which is in contact with, or embedded in, wet brickwork or masonry.
  • Symptoms are: timber cracking, fruiting bodies, red dust or an acrid mushroom smell.
  • It has been known to transport water up three storeys of a building to an area where decay is occurring.