Identify the moisture source first. Plan the right repair or treatment.
Wet rot & dry rot inspections
Assessment of accessible timber and fungal decay
Moisture diagnosis
Find what allowed timber to become damp
Reports for buyers & owners
Clear findings and practical next steps
Remedial services
Appropriate treatments, timber repair or replacement
Recognising timber decay
Signs you may need a rot inspection
These symptoms can have different causes. Our job is to establish whether wet rot, dry rot or another timber issue is present and whether repair is required.
Spongy or crumbling wood
Floorboards, joists, skirtings or beams that feel weak or break apart may have been affected by prolonged moisture.
Growth or staining
Fungal material, fruiting bodies, rusty-coloured spores or unusual growths deserve careful assessment.
Leaks or musty smells
Roof leaks, damp masonry, poor sub-floor ventilation and plumbing defects can contribute to timber decay.
Rot mentioned in a report
A HomeBuyer Report or mortgage valuation may recommend further inspection before you commit to a property.
Two ways we can help
Need a timber survey or actual rot repairs?
Start with the type of help you need. We can assess an unknown problem, or discuss appropriate remedial work when the cause and extent have already been established.
For buyers, sellers & property owners
Professional inspection of accessible timber, moisture sources and suspected fungal decay. Written findings explain what was found, relevant limitations and recommended next steps.
Useful after a HomeBuyer Report, lender query or discovery of soft or damaged timber.
For homes needing remedial work
Where rot is confirmed and work is appropriate, DampServe can provide a quotation for suitable treatment, removal or repair of decayed timber and related moisture-control work.
The right scope depends on access, decay extent, structural condition and correcting the moisture source.
What is dry rot?
Dry rot is a form of fungal timber decay commonly associated with Serpula lacrymans. Despite its name, it requires moisture to establish and develop. It can affect floor timbers, beams and concealed building elements.
Evidence can include cuboidal cracking, brittle timber, mycelium, fruiting bodies and rusty-coloured spore dust. Some signs can resemble other fungal problems, so identification should be based on the evidence.
Where dry rot is suspected, early investigation helps establish its extent, the moisture source and whether opening-up, timber replacement or other specialist works are needed.
- Inspect visible fungal growth and affected timbers
- Investigate damp masonry, leaks and poorly ventilated voids
- Assess whether hidden damage or further inspection is likely
- Recommend appropriate repair and treatment, not automatic blanket treatment
What is wet rot?
Wet rot is fungal decay associated with timber remaining damp for an extended period. It is commonly linked to a particular defect such as a leaking pipe, damaged roof, poorly ventilated floor void or damp wall.
Wet rot is often more localised than dry rot, but it can still weaken floorboards, joists, skirtings and other structural or joinery timbers. The right remedy depends on how far decay has progressed.
Removing the moisture source is essential. Affected timber may need drying, localised repair or replacement. Chemical treatment is not automatically the answer.
- Soft, discoloured, spongy or crumbly timber
- Localised growth, staining or peeling paint
- Signs of persistent leaks or moisture nearby
- Repairs sized to the actual damage and access available
Comparing common timber decay
Dry rot vs wet rot — what is the difference?
Both are fungal timber decay, but the likely spread, urgency of investigation and repair approach can differ. This is a general comparison, not a substitute for inspection.
Where structural timbers are significantly damaged, further opening-up or specialist structural assessment may be required.
| Feature | Dry rot | Wet rot |
|---|---|---|
| Moisture | Requires moisture and suitable conditions for development | Usually linked to timber remaining persistently damp |
| Spread | Can extend from the initial affected timber where conditions allow | Often concentrated near the source of moisture |
| Common signs | Cuboidal cracking, fungal growth, spores or fruiting bodies | Soft or crumbly timber, discolouration and localised decay |
| First priority | Investigate promptly, locate moisture and assess the extent | Remove moisture source and establish the damaged area |
| Remedial work | May require careful opening-up, timber repairs and targeted treatment | Often moisture control and localised timber repair or replacement |
Diagnosis before treatment
Fix the moisture source, then the timber
Replacing decayed wood without dealing with moisture can allow further damage. We look for causes such as defective roofs, leaks, damp masonry, raised external ground levels, blocked sub-floor ventilation or moisture trapped in voids.
Our surveys are a paid service. Reports normally contain our findings, recommendations and a quotation for suitable remedial works where required. If you want a report-only service without a treatment quotation, you can request that when booking.
There is no obligation to instruct DampServe to undertake any recommended work.
How a typical case progresses
- Inspect accessible timbers and record visible decay
- Investigate moisture entry or condensation conditions
- Explain severity, access limitations and the required next steps
- Provide a written report and, where appropriate, a repair quotation
- Carry out agreed remedial work if the customer chooses
Work we can help with
Wet rot and dry rot treatments & repairs
Once the cause and extent are understood, we can recommend and quote for suitable remedial works. Each property is different: a minor isolated issue should not be treated like a widespread structural failure.
Availability and feasibility of specific repair work depend on the property, access, structural requirements and agreed survey findings.
Moisture-control repairs
Addressing contributing defects or advising on appropriate repairs to prevent timber staying damp.
Timber repairs
Localised repair or replacement of damaged timber where feasible and appropriate to the agreed scope.
Targeted treatment
Specialist treatment where evidence supports it, together with correcting the underlying moisture conditions.
Making good
Associated reinstatement and plastering where needed and included in the quotation.
Professional timber reports
What a rot survey may include
The exact scope depends on access, the property and your instructions.
- Accessible structural and joinery timber inspection
- Evidence of fungal decay and likely type
- Relevant moisture measurements and interpretation
- Investigation of the likely source of dampness
- Photographs and plain-English findings
- Recommendations for further opening-up if needed
- Advice on repair, drying, ventilation or treatment
- Quotation for suitable works where necessary, unless report-only is requested
For property transactions
Buying or selling a property?
A HomeBuyer Report, Building Survey or mortgage valuation may mention suspected dry rot, wet rot, timber decay or defective floor timbers and ask for specialist investigation.
Our written reports can help explain the apparent extent, likely cause and recommended next steps. If your lender or solicitor has specific requirements, send us the wording before booking; acceptance remains their decision.
Surveys for existing homeowners, landlords and commercial properties are also available.
Need help identifying damage?
Not sure if it is wet rot or dry rot?
Send photographs of the affected timber, nearby wall or floor, any fungal growth and possible sources of moisture. Photos may help us understand your concern and recommend the appropriate next step, but cannot replace an inspection or confirm hidden damage.
For urgent concerns involving weakened or unsafe floors and structural timbers, avoid loading the affected area and seek appropriate professional assessment.
Send timber damage photos
WhatsApp images can help explain your enquiry before arranging a paid survey.
Frequently asked questions
Wet rot and dry rot FAQs
Answers about diagnosis, reports, moisture, treatment and repair costs.
Both are forms of fungal timber decay associated with moisture. Wet rot is often localised to persistently damp timber, while dry rot can spread beyond the initially affected area where conditions allow. Identification depends on the evidence at the property.
Possible signs include brittle timber with cuboidal cracking, fungal growth, fruiting bodies or rusty-coloured spores. Other timber problems can look similar, so a specialist inspection is advisable.
Suspected active dry rot should be investigated promptly, especially where structural timber is affected. The works required depend on the moisture source, damage extent and access; immediate widespread chemical treatment is not always justified.
Often yes. Removing the moisture source and repairing or replacing timber that has lost strength can be the main solution. Any treatment should depend on the diagnosis and conditions.
Common causes include leaking roofs or plumbing, defective gutters, damp masonry, poor sub-floor ventilation, condensation and moisture trapped in floor or wall voids.
Yes. DampServe can inspect the problem and provide a quotation for suitable treatments, timber repairs and associated remedial work. The scope depends on access, condition, structural requirements and what the survey establishes.
Yes. Our paid surveys can include written findings, photographs and practical recommendations, subject to access and the agreed inspection scope. Reports normally include quotations for suitable work where necessary, unless a report-only service is requested.
Costs vary with the moisture source, amount of decayed timber, accessibility, need for opening-up and repair method. We can quote once the required work is established. Our survey fees are separate from treatment costs.
We prepare specialist reports for property buyers and mortgage-related enquiries. Please share any wording from the surveyor, lender or solicitor before the inspection; the requesting organisation decides whether it accepts the report.
Useful DampServe pages
Explore our related surveys & treatments
Further information about damp, timber decay, property reports and appropriate remedial work.
Damp & Timber Surveys
Our main nationwide survey and written report service
Pre-Purchase Reports
Specialist reporting for buyers and property transactions
Woodworm Specialists
Survey and treatment advice for wood-boring insects
Damp Proofing & Repairs
Investigating and treating the causes of dampness
Survey Costs & Prices
Understand paid inspection and reporting fees
Condensation & Mould
Diagnosing moisture and ventilation-related problems
Areas covered
Wet rot & dry rot surveys across our UK service areas
DampServe provides specialist surveys and appropriate remedial work across much of England and Wales. You can find regional and town information through our existing location pages.
Timber decay specialists
Need a wet rot or dry rot survey?
Tell us what you have found and where the property is. We can explain the next step, arrange an appropriate paid inspection and discuss repair or treatment where needed.