Timber decay and woodworm
Strands are reported in a cellar and no fruiting body was present. Why is the strand note not a finished identification?
The strand note is not a finished identification because strands without a fruiting body do not settle the fungus. The survey reports strands in the cellar and records that no fruiting body was present. Several decay fungi can leave strands, and a name such as dry rot needs more than a thread on its own. The note describes what was seen. It has not named the species, has not sampled the timber, and has not mapped how far any growth runs. Treat the sentence as unfinished.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
A fruiting body is the part that often carries the features used to name a fungus. Without it, strands in a damp cellar can be argued over from appearance alone. Dry rot is feared because its growth can travel, including across masonry, but the survey has not demonstrated that travel and has not proved the species. Wet rot stays local to wet timber and is a different problem. The report has not chosen between them. It has recorded strands and an absence.
Ask a timber specialist to identify the growth if the purchase depends on the name, and do not disturb the area in a way that destroys the evidence before that visit. Tell the solicitor the identification is unfinished. A lender may want the specialist's words rather than a rereading of the strand sentence. The survey has not treated the cellar and has not guaranteed the rest of the timber. The next report is a new instruction.
What should you ask your surveyor?
- Was a fruiting body present to name the fungus?
- Has the species been settled from strands alone?
- Has the survey mapped how far any growth runs?
What are the typical next steps?
- Treat the identification as unfinished.
- Instruct a timber specialist if the species must be named.
- Tell the solicitor the cellar note is not a finished diagnosis.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
Does a musty smell finish the identification?
No. A smell can support a concern about damp timber. It does not name the fungus, and it does not replace the missing fruiting body. The survey's strand note is still a description of what was seen. Ask the specialist to see the growth rather than the adjective. Do not promote a smell into a species.
Could the strands be old and inactive?
They could. The survey has not tested whether the growth is active, and it has not sampled it. Old strands can remain after the outbreak that made them. Inactivity is a judgement for a specialist who can see the timber, the moisture and the growth together. The report records the strands. It does not retire them.