What is Wet rot?
Wet Rot
WHAT IS WET ROT?
Wet rot is a type of fungal decay that occurs in timber with a high moisture content. It is caused by various fungi, most commonly Coniophora Puteana. Unlike dry rot, wet rot remains confined to the damp area and does not spread through masonry.
What is Wet Rot?
Wet rot is a type of fungal decay that occurs in timber with a high moisture content. It is caused by various fungi, most commonly Coniophora puteana. Unlike dry rot, wet rot remains confined to the damp area and does not spread through masonry.
Signs of Wet Rot
Here are the key indicators of wet rot:
- Damp and Soft Wood
- The wood feels damp and spongy to the touch. It may also appear darker than the surrounding timber.
- Cracking and Warping
- Affected wood may crack, split, or warp. The surface can appear crumbly or fibrous.
- Fungal Growth
- Look for black or brown fungal growth on the wood. This can sometimes appear as a fine, thread-like structure.
- Musty Smell
- Wet rot often produces a damp, musty odor, similar to the smell of decaying vegetation.
- Paint Damage
- Paint or wallpaper covering the affected area may show signs of damage, such as peeling or blistering.
How to Confirm Wet Rot
To confirm the presence of wet rot, follow these steps:
- Probe the Wood
- Use a screwdriver or similar tool to test the wood. If it feels soft and breaks apart easily, it could be wet rot.
- Check for Moisture
- Use a moisture meter to measure the moisture content in the wood. Wet rot typically occurs in wood with a moisture content above 20%.
- Professional Inspection
- If you’re unsure, consult a professional. They can provide a thorough inspection and confirm the presence of wet rot.
Preventing Wet Rot
Preventing wet rot involves controlling moisture levels in your home. Here are some tips:
- Ensure Proper Ventilation
- Keep your home well-ventilated to reduce humidity levels.
- Fix Leaks Promptly
- Repair any leaks in your roof, walls, or plumbing to prevent moisture buildup.
- Use Treated Wood
- When building or repairing structures, use wood that has been treated to resist fungal decay.
Conclusion
Identifying wet rot early can help you prevent extensive damage to your property. By knowing the signs and taking prompt action, you can protect your home from this type of fungal decay. If you suspect wet rot, don’t hesitate to seek professional help to ensure it is properly treated.
Trusted Across Bath, Bristol & the South West
Cannon Clarke delivers domestic and commercial structural waterproofing across:
- Bath — heritage properties, basement conversions, retaining walls
- Bristol — modern developments, commercial units, residential refurbishments
- Somerset & Wiltshire — rural properties, cellars, below‑ground extensions
Trusted by:
- Surveyors
- Insurers
- Property managers
- Homeowners across the South West
Our reputation is built on technical accuracy, reliability and long‑term results.
Case Study Snapshots
Bath — Basement Conversion
Installed a full cavity drainage system with sump and pump, resolving long‑term damp issues and enabling a habitable living space.
Bristol — Commercial Unit
Applied cementitious waterproofing to retaining walls experiencing hydrostatic pressure, preventing water ingress during peak rainfall.
Somerset — Heritage Property
Designed a non‑intrusive waterproofing solution compatible with historic masonry and conservation requirements.
Compliance & Standards
Our waterproofing systems meet:
- BS 8102:2022 — Code of practice for protection of below‑ground structures where applicable
- Manufacturer installation standards
- Insurance‑backed guarantee requirements
All work is carried out by our employed trained specialists with extensive experience in below‑ground protection.
FAQs
What causes basement leaks?
Basement leaks are typically caused by hydrostatic pressure, poor drainage, failed membranes or structural cracks.
Do you follow BS 8102?
Yes. Where Applicable all waterproofing systems are designed and installed in accordance with BS 8102:2022.
Can waterproofing be added to existing basements?
Absolutely. We regularly retrofit waterproofing systems to older properties and heritage buildings.
How long does installation take?
Most projects take between 5–10 days depending on size and complexity. (larger projects will take longer.
Do you offer guarantees?
Yes. We provide manufacturer-backed and insurance-backed guarantees where applicable.
More information?
For reliable structural waterproofing, call Cannon Clarke or book a professional survey. We’ll assess your property, explain your options and provide a clear, compliant plan.
Our Process
Survey
We start by conducting a thorough survey of the space you want inspected. There's usually a fee for our initial consultation.
01
Scoping discussion
We collaborate with you to marry your objectives with our findings from the survey. We’ll discuss how you want to use the space when it’s finished and the best way of achieving your vision.
02
Design
Once we have the physical specifications, and your input on your requirements, we’ll design a system that works for you.
03
Approval
We’ll send you a specification, together with a report which explains the technical aspects. We’re happy to chat through this with you and make any changes you’ve identified.
04
Work begins
With an approved plan in place, we’ll get to work on the date we’ve agreed between us.
05