Nelson, Gwent
Condensation and mould ventilation fixes in Nelson (Gwent)
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Nelson and CF45, CF46 and CF82.
- From £425 inc VAT per fan
- Free survey

We survey Nelson homes for condensation with meters, not guesswork, and explain what we find.
We cover Nelson and the surrounding CF45, CF46 and CF82 postcodes as part of our work across Gwent. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
Condensation and mould fixes in Nelson at a glance
- Town
- Nelson, Gwent
- Postcode districts
- CF45, CF46 and CF82
- Nearby
- Treharris (1 mile), Gelligaer (1 mile) and Bargoed (3 miles)
- Price region
- Wales
- Survey
- Free survey (UK mainland)
What the work involves
Mould needs that damp surface to grow. Ventilation is usually the biggest part of the cure, but not the only part.
Mould treatment advice
How to clean and treat affected areas once the cause is fixed.
Survey and findings
Humidity and surface readings, existing fans flow-tested, and a written list of causes and fixes.
Guide prices in Nelson
| Work | Guide price |
|---|---|
| Condensation and mould ventilation survey with written findings (per home) | £120–£215 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £425–£700 inc VAT |
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £750–£1,325 inc VAT |
Wales rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
Common reasons people call
- Water running down windows on cold mornings
- Musty smell in bedrooms or wardrobes
- Peeling paint or wallpaper in bathrooms
Rules that apply in Wales
Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. In Wales, damp and mould is one of the matters that decides whether a rented home is fit for human habitation.
Questions from Nelson
Is the survey free in Nelson?
For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.
How much does a condensation survey cost?
A ventilation survey with written findings costs £125 to £225 including VAT. If we are surveying for an installation we quote for, the survey is free.
Can you tell if it is rising damp?
We can tell you when the pattern does not look like condensation, such as a tide mark low on a wall or damp that appears after rain, and point you to the right specialist.
How do I get a price for a condensation fix in Nelson?
Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.
What area around Nelson do you work in?
All of Gwent. Near Nelson that includes Treharris, Gelligaer, Bargoed and Blackwood.
Book a condensation survey in Nelson and get a written list of causes and fixes.
Condensation and mould fixes near Nelson
More services in Nelson
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.