Friern Barnet, Greater London
Condensation and mould ventilation fixes in Friern Barnet
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Friern Barnet and N11, N12 and N20.
- From £525 inc VAT per fan
- Free survey

For Friern Barnet homes with streaming windows every morning, the fix is usually cheaper than people expect.
Friern Barnet is about 99 miles from our base in Great Barr, Birmingham. We book Friern Barnet visits by appointment and confirm the date in writing. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
Condensation and mould fixes in Friern Barnet at a glance
- Town
- Friern Barnet, Greater London
- Postcode districts
- N11, N12 and N20
- Nearby
- Muswell Hill (2 miles), Finchley (2 miles) and Wood Green (2 miles)
- Price region
- London
- 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.
Survey and findings
Humidity and surface readings, existing fans flow-tested, and a written list of causes and fixes.
Fan upgrades
Weak or loft-vented fans replaced and ducted outside, with humidity control.
Guide prices in Friern Barnet
| Work | Guide price |
|---|---|
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £415–£725 inc VAT |
| Condensation and mould ventilation survey with written findings (per home) | £150–£270 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £525–£900 inc VAT |
These ranges use our London rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Common reasons people call
- Peeling paint or wallpaper in bathrooms
- Damp patches that dry out in summer and return in winter
- Someone in the home with asthma or allergies made worse by damp
Rules that apply in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. Damp and mould is assessed as a hazard under the Housing Health and Safety Rating System in England.
Questions from Friern Barnet
How do I get a price for a condensation fix in Friern Barnet?
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.
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.
What is the main cause of condensation in a house?
The main cause is moisture from everyday living, such as showers, cooking and drying clothes, that is not being extracted, combined with cold surfaces where it condenses. Poor or failed extract fans are a very common cause.
What area around Friern Barnet do you work in?
All of Greater London. Near Friern Barnet that includes Muswell Hill, Finchley, Wood Green and Palmers Green.
Do you cover Friern Barnet and nearby?
Yes. We cover Friern Barnet and nearby places including Muswell Hill, Finchley, Wood Green and Palmers Green. Send your postcode and we will confirm.
Send us photos of the mould and your fans and we will give a first view for your Friern Barnet home.
Condensation and mould fixes near Friern Barnet
More services in Friern Barnet
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.