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Dry rot / Wet Rot

Dry rot / Wet rot

Dry rot (Serpula Lacrymans) is the most serious type of rot. It can cause major structural damage to a house of any age. Dry rot can go unnoticed until it is at an advanced stage.

This type of rot can spread over materials that provide no nutritional value like plaster and masonry. It only needs a moisture content of above 20% to grow.

The fruiting bodies of Dry rot fungi that evolve during an attack on the wood create microscopic spores. These are then circulated around a room by currents of air which enables the Dry rot to spread.

Dry rot likes dark, unventilated areas such as:

  • Flat Roofs
  • Suspended timber floors
  • Derelict buildings
  • Buildings which have been left vacant/closed up for long periods of time
  • Where Rising damp and/or a water leak is present

Signs of Dry Rot

  • Wood shrinks and cracks in a cuboidal manner
  • Growth of pancake-like fungus
  • Mycelium
  • Dry timber can crumble between fingers
  • Musty mushroom-like odour

Call Us Today

For expert advice call us today on (01) 2340048 (Dublin) or (052) 6128454 (Tipperary).
Alternatively, you can email us at

Wet Rot

Wet rot is more common than Dry rot. Decay is typically confined to the area where timber has become and remains wet with moisture content more than 50%. Firstly, finding the source of dampness and eliminating the moisture is always necessary.

Although Wet rot is not as serious as Dry rot, it can also cause serious structural damage if not treated.

On the right is a miniature boroscope camera detecting condensation in subflooring. This is providing the perfect conditions for Dry rot / Wet rot.

Identification and Treatment

It is important to correctly identify the type and source of fungal attack before carrying out any treatments. Acorn Property Preservation uses the latest technology, non-destructive survey meters and equipment to carry out damp and timber inspections. We will then provide a detailed survey report to specify remedial treatments and works for Dry Rot and Wet Rot.

These treatments can be carried out by our experienced team of technicians and tradespeople. We can also work in conjunction with your local trusted tradespeople.

Acorn Property Preservation’s work is carried out to the highest standards. A detailed quotation is provided prior to any work being undertaken.

Our service is professional, inexpensive and non-intrusive.

Misdiagnosis can result in costly and unnecessary renovations.

The process for dealing with concerns of Dry rot is very straight forward. Just contact our office either by email or phone, (we offer a nationwide service so don’t worry). Leave your name and phone number, some details about the property (where it is, roughly what size, whether it’s a Castle or a 3 Bed-semi) and a member of staff will contact you to arrange a survey for Dry rot.

The time involved to conduct a survey for Dry rot varies but usually takes 1-3 hours depending on the size and condition of the property, we then generate a report within 10 working days of the date of the survey which we send to you by post or email it to you as a PDF.

Following that, with your instructions we can provide you with a quotation for the appropriate remedial treatment.