Ruislip, Greater London
Condensation and mould ventilation fixes in Ruislip
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Ruislip and HA4, HA5 and UB10.
- From £525 inc VAT per fan
- Free survey

Mould in a Ruislip bedroom or bathroom is almost always a ventilation problem first.
We cover Ruislip and the surrounding HA4, HA5 and UB10 postcodes as part of our work across Greater London. 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 Ruislip at a glance
- Town
- Ruislip, Greater London
- Postcode districts
- HA4, HA5 and UB10
- Nearby
- Ruislip Manor (1 mile), Ickenham (1 mile) and South Ruislip (1 mile)
- 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.
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 Ruislip
| Work | Guide price |
|---|---|
| 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 |
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £950–£1,675 inc VAT |
Guide prices using London rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Signs it is time to call us
- 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 Ruislip
Do you cover Ruislip and nearby?
Yes. We cover Ruislip and nearby places including Ruislip Manor, Ickenham, South Ruislip and Northwood Hills. 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 Ruislip?
Guide prices for Ruislip 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 Ruislip?
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.
If we fit the fix, the Ruislip survey is free.
Condensation and mould fixes near Ruislip
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