Isleworth, Greater London
Condensation and mould ventilation fixes in Isleworth
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Isleworth and TW3, TW5 and TW7.
- From £525 inc VAT per fan
- Free survey
We survey Isleworth homes for condensation with meters, not guesswork, and explain what we find.
For condensation and mould ventilation fixes in Isleworth, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.
Condensation and mould fixes in Isleworth at a glance
- Town
- Isleworth, Greater London
- Postcode districts
- TW3, TW5 and TW7
- Nearby
- Osterley (1 mile), Hounslow (1 mile) and Heston (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
How we approach condensation and mould fixes in Isleworth
Ventilation is usually the biggest part of the cure, but not the only part. Heating patterns, insulation gaps and cold bridges matter too, and some damp is not condensation at all: leaks, penetrating damp and rising damp need different trades.
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 Isleworth
| Work | Guide price |
|---|---|
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £525–£900 inc VAT |
| 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 |
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
- 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). Serious damp and mould is a hazard under the Housing Health and Safety Rating System, and social landlords now have fixed timescales under Awaab's Law.
Questions from Isleworth
Is the survey free in Isleworth?
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.
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.
Will a dehumidifier fix condensation?
A dehumidifier helps in one room but treats the symptom. Fixing the extract in the wet rooms, and adding whole-home ventilation where needed, removes moisture before it spreads.
How do I get a price for a condensation fix in Isleworth?
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 Isleworth do you work in?
All of Greater London. Near Isleworth that includes Osterley, Hounslow, Heston and Brentford.
Get a guide price online, then we confirm the plan on a free survey in Isleworth.
Condensation and mould fixes near Isleworth
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