Opening hours    Mon – Sat: 8:00 – 17:00 

Dry Rot Caused Huge Damage in this House

February 8, 2019

Our CSSW-qualified surveyor quickly found the cause of this excessive dry rot. The downpipe to the front bay was found to be disconnected, and water ingress from this was the cause of the dry rot.

Excess moisture penetrated the building fabric and absorbed by the adjacent timbers; raising their moisture content to above 20% of their oven-dry weight.

This resulted in the germination of the spores of the true Dry Rot fungus (Serpula lacrymans) bringing about the breakdown of the timbers in the lounge area.

Our technicians undertook timber replacement, Dry Rot sterilisations and replacement works within the bay area.

What is Dry Rot?

Dry Rot spores are ubiquitous and there is no environment free of them.

Spores will germinate and grow in timber with a moisture content of between 20 and 30 per cent. The fine fungal thread (hypha) digests the cellulose and hemi cellulose fractions of the wood, but is unable to attack the structural lignin.

These remain as a brittle matrix which cracks into cubes under differential stresses. Cuboidal cracking is also a characteristic of many wet rots and does not automatically indicate the presence of Dry Rot. Fungal hyphae may clump together into a variety of structures known as mycelia which takes various forms depending on the surrounding conditions.

They may fill a humid cavity as a cotton wool-like mass, or grow across the surface of the timber as grey-white skin. Active Dry Rot has a fresh white or greyish appearance. Some hyphae group together to form conducting strands. Their main function is the conduction of nutrients through inert non-nutrient materials (brickwork etc.) to permit eventual colonisation of other timbers.

Their relatively impervious outer layer, together with an unusual alkaline tolerance, allows them to survive in the mortar layers within masonry and walls and an infested area may be full of Dry Rot strands.

The Dry Rot fungus may tolerate relatively lower moisture contents and, through this and other quirks in its biology, is potentially capable of considerable destruction.

The important factor is to recognise the difference between Dry Rot and Wet Rot and be sure to perform the correct treatment. Premier Contractors have unrivalled experience in the sector.

Like all our work, this project comes with a comprehensive 10-year guarantee with the added assurance of an insurance backed guarantee, if required.

To find out more, book a free, no obligation survey <here> or call us today on 0800 246 1548

February 8th, 2019