Osterley, Greater London
Condensation and mould ventilation fixes in Osterley
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Osterley and TW3, TW5 and TW7.
- From £525 inc VAT per fan
- Free survey
In Osterley homes, black mould usually comes down to the same few causes: weak fans, loft-vented ducts and no background ventilation.
For condensation and mould ventilation fixes in Osterley, 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 Osterley at a glance
- Town
- Osterley, Greater London
- Postcode districts
- TW3, TW5 and TW7
- Nearby
- Isleworth (1 mile), Hounslow (1 mile) and Heston (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
Condensation and mould fixes for Osterley homes
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 Osterley
| 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 |
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.
When to get it looked at
- Someone in the home with asthma or allergies made worse by damp
- Black mould on window reveals, ceilings or behind furniture
- Water running down windows on cold mornings
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 Osterley
What area around Osterley do you work in?
All of Greater London. Near Osterley that includes Isleworth, Hounslow, Heston and Brentford.
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.
Do you cover Osterley and nearby?
Yes. We cover Osterley and nearby places including Isleworth, Hounslow, Heston and Brentford. Send your postcode and we will confirm.
What is the price of a condensation fix in Osterley?
Guide prices for Osterley 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.
Send us photos of the mould and your fans and we will give a first view for your Osterley home.
Condensation and mould fixes near Osterley
More services in Osterley
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.