Combating Dry Rot in Brittany: A Survival Guide for Homeowners in Finistère and Morbihan

What is weeping dry rot?

Weeping rot, also known as Serpula lacrymans, is a wood-eating fungus that attacks the woodwork of buildings. This parasite is particularly feared because of its ability to cause significant structural damage to homes. In Brittany, particularly in the departments of Finistère and Morbihan, dry rot represents a real scourge for owners.

The different stages of dry rot development

To help identify a dry rot infestation at home, it is important to know its different stages of development:

• The mycelium: This is the initial stage of the fungus. The mycelium appears in the form of a whitish web which gradually covers contaminated surfaces. At this point it may be difficult to see without careful inspection.
• The appearance of mycelial cords: These filamentous structures allow the fungus to spread quickly through porous materials such as wood or plaster. The cords are usually brown or black and can be several centimeters long.
• Spore emission: When mature, the dry rot produces reddish to brown spores. These spores are disseminated in the air and can contaminate other parts of the building or even neighboring homes.
• The formation of fruiting bodies: This stage corresponds to the appearance of mushroom-like structures, usually dark brown or blackish. They are a sign of an advanced infestation and indicate that dry rot has already caused significant structural damage.

Where to find weeping dry rot in a building?

Dry rot particularly appreciates humid and poorly ventilated environments. It usually develops in the following places:

• The attic : Roof leaks or poor insulation can encourage the appearance of rot in this space which is often difficult to access for regular inspection.
• Cellars and basements: These underground areas often have high humidity conducive to the development of the fungus. Water infiltration through walls or floors is also an aggravating factor.
• The attics: Just like attics, attics that are poorly insulated or prone to infiltration are likely to be affected by dry rot.
• In terms of interior joinery (plinths, frames, parquet floors, etc.): Areas in contact with the ground or damp walls are particularly at risk.

How to recognize dry rot using images?

To make it easier to identify a dry rot infestation at home, here are some descriptions of photos taken in Brittany (Finistère and Morbihan) in various infected buildings:

• Mycelium: A thin whitish layer covering part of the wood or walls. This structure resembles a spider web.
• Mycelial cords: Brown or black filaments extending several centimeters, often grouped in bundles.
• Spores: A reddish to brownish powdery deposit present on surrounding surfaces.
• Fruiting: Mushroom-like structures, dark brown or blackish in color, up to several centimeters in diameter.

The importance of a professional diagnosis to combat dry rot

Although these visual indications can help identify a dry rot infestation at home, it is essential to seek professional help to make an accurate diagnosis. Indeed, some signs can be misleading and confused with other less serious problems such as surface mold. An expert will also be able to determine the extent of the damage and propose suitable solutions to effectively treat dry rot.

Take advantage of a free diagnosis in Brittany (Finistère and Morbihan)

If you suspect the presence of dry rot in your home located in Finistère or Morbihan, do not hesitate to request a free diagnosis from a professional. This will not only allow you to confirm or refute your fears, but also to obtain personalized advice to combat this scourge and preserve your real estate assets.