Bow, Greater London
Condensation and mould ventilation fixes in Bow
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Bow and E3, E14 and E15.
- From £525 inc VAT per fan
- Free survey

For tenants, landlords and homeowners in Bow, the common question is why the mould keeps coming back.
For condensation and mould ventilation fixes in Bow, 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 Bow at a glance
- Town
- Bow, Greater London
- Postcode districts
- E3, E14 and E15
- Nearby
- Stratford (1 mile), Limehouse (1 mile) and Stepney (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
A typical family puts several litres of water into the air every day. 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.
Fan upgrades
Weak or loft-vented fans replaced and ducted outside, with humidity control.
Whole-home ventilation
PIV, continuous extract or MVHR where moisture is spread through the house.
Guide prices in Bow
| 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 |
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
- Black mould on window reveals, ceilings or behind furniture
- Water running down windows on cold mornings
- Musty smell in bedrooms or wardrobes
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). Damp and mould is assessed as a hazard under the Housing Health and Safety Rating System in England.
Questions from Bow
Do you cover Bow and nearby?
Yes. We cover Bow and nearby places including Stratford, Limehouse, Stepney and Blackwall. 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 Bow?
Guide prices for Bow 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 Bow?
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.
Get a guide price online, then we confirm the plan on a free survey in Bow.
Condensation and mould fixes near Bow
More services in Bow
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.