Nailsea, Somerset
Condensation and mould ventilation fixes in Nailsea
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Nailsea and BS20, BS21 and BS48.
- From £465 inc VAT per fan
- Free survey

In Nailsea, condensation and mould are usually at their worst between October and March.
We cover Nailsea and the surrounding BS20, BS21 and BS48 postcodes as part of our work across Somerset. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
Condensation and mould fixes in Nailsea at a glance
- Town
- Nailsea, Somerset
- Postcode districts
- BS20, BS21 and BS48
- Nearby
- Portishead (4 miles), Yatton (4 miles) and Clevedon (4 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
Condensation and mould fixes for Nailsea homes
If extract fans are weak, ducted into the loft or switched off, and windows stay shut in winter, that moisture settles on the coldest surfaces: window reveals, external corners, behind wardrobes and on bathroom ceilings. Mould needs that damp surface to grow.
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 Nailsea
| Work | Guide price |
|---|---|
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £360–£625 inc VAT |
| Condensation and mould ventilation survey with written findings (per home) | £130–£235 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £465–£775 inc VAT |
South West rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
Signs it is time to call us
- Water running down windows on cold mornings
- Musty smell in bedrooms or wardrobes
- Peeling paint or wallpaper in bathrooms
Rules that apply in England
In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). Damp and mould is assessed as a hazard under the Housing Health and Safety Rating System in England.
Questions from Nailsea
What is the price of a condensation fix in Nailsea?
Guide prices for Nailsea use South West rates: new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £465 to £775 inc VAT per fan. We confirm a fixed price in writing before any work starts.
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.
Is the survey free in Nailsea?
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 do I get a price for a condensation fix in Nailsea?
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.
Book a condensation survey in Nailsea and get a written list of causes and fixes.
Condensation and mould fixes near Nailsea
More services in Nailsea
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