Chiswick, Greater London
Condensation and mould ventilation fixes in Chiswick
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Chiswick and W3, W4 and W6.
- From £525 inc VAT per fan
- Free survey
In Chiswick homes, black mould usually comes down to the same few causes: weak fans, loft-vented ducts and no background ventilation.
Work in Chiswick follows the rules for England and finishes with a written record of what was fitted and how it was set up.
Condensation and mould fixes in Chiswick at a glance
- Town
- Chiswick, Greater London
- Postcode districts
- W3, W4 and W6
- Nearby
- Acton (1 mile), Barnes (1 mile) and Kew (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
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 Chiswick
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £950–£1,675 inc VAT |
| 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 |
These ranges use our London rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
When to get it looked at
- Musty smell in bedrooms or wardrobes
- Peeling paint or wallpaper in bathrooms
- Damp patches that dry out in summer and return in winter
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 Chiswick
Do you cover Chiswick and nearby?
Yes. We cover Chiswick and nearby places including Acton, Barnes, Kew and Mortlake. Send your postcode and we will confirm.
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 is the price of a condensation fix in Chiswick?
Guide prices for Chiswick use London rates: new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £525 to £900 inc VAT per fan. We confirm a fixed price in writing before any work starts.
Is the survey free in Chiswick?
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.
Book a condensation survey in Chiswick and get a written list of causes and fixes.
Condensation and mould fixes near Chiswick
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