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Dry Rot and Other Fungal Attack

This page aims at helping you to spot the signs of dry rot and other fungal attack damage. The information below should help you identify any related problems you may currently have.

Spot the Signs

Dry Rot

Serpula Lacrymans

Type of Rot: Brown.

Timber Attacked: Mostly Softwoods.

Damage: Cuboidal (square shaped) cracking. Deep. Often cubes are large. No sound surface skin of wood.

Growth (Mycelium):

  1. Silky grey skin often tinged with patches of lilac and yellow colour. Peels like a mushroom tearing in direction of growth. Some areas may be fawn coloured to creamy reddish brown sheets especially over masonry/earth.
  2. White fluffy cotton wood like growth. Grows over/in damp masonry.

Strands: Grey, tough, brittle when dry.

Fruiting Body (Spores): Fleshy pancake or bracket with white margin. Pore surface reddish-brown with wide, shallow pores. Spores orange coloured, often seen on nearby surfaces.

Cellular Fungus

Coniophora Puteana

Type of Rot: Brown.

Timber Attacked: Hardwoods and softwoods.

Damage: Cuboidal cracking. Rot often internal, leaving a thin surface ‘skin’ of sound wood. Wood in very early stages of attack may show slight yellow colouration.

Growth (Mycelium): If present olive brown to black sheets under humid conditions. Can be white in very early stages. Limited growth over very damp masonry.

Strands: Olive brown to black. Relatively fine and delicate. Do not become brittle when dry.

Fruiting Body (Spores): Reported to be rare. Thin olive brown plate with cream margin. Some small lumps on surface.

Mine Fungus

Antrodia (Fibroporia) Vaillantii

Type of Rot: Brown.

Timber Attacked: Softwoods.

Damage: Cuboidal cracking. Not as deep as dry rot.

Growth (Mycelium): Pure white. Occasionally tinged with light orange patches. Growth is usually fern like. Growth over/in damp masonry but not so extensive as dry rot.

Strands: Pure white and tough. Remain flexible when dry. Can grow quite thick.

Fruiting Body (Spores): White and fleshy. Up to 15mm in thickness. Small angular pores give surface a small honeycomb like appearance.

Tapinella Fungus

Paxillus panuoides

Type of Rot: Brown.

Timber Attacked: Usually very damp softwoods.

Damage: Deep cuboidal cracking. Wood first takes on a cheese like colouration (yellow) and consistency. On drying deep cuboidal cracks appear and wood becomes a golden colour.

Growth (Mycelium): Yellowish in colour. Wool like. Tinges of violet colouration may also develop.

Strands: Pure white and tough. Remain flexible when dry. Can grow quite thick.

Fruiting Body (Spores): White and fleshy. Up to 15mm in thickness. Small angular pores give surface a small honeycomb like appearance.

Services

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Surveys

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