Southall, Greater London
Condensation and mould ventilation fixes in Southall
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Southall and UB1, UB2, UB5 and UB6.
- From £525 inc VAT per fan
- Free survey

For tenants, landlords and homeowners in Southall, the common question is why the mould keeps coming back.
Work in Southall 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 Southall at a glance
- Town
- Southall, Greater London
- Postcode districts
- UB1, UB2, UB5 and UB6
- Nearby
- Greenford (2 miles), Heston (2 miles) and West Ealing (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
How we approach condensation and mould fixes in Southall
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. We tell you if that is what we find rather than selling a fan that will not help.
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 Southall
| 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.
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 Southall
Do you cover Southall and nearby?
Yes. We cover Southall and nearby places including Greenford, Heston, West Ealing and Osterley. Send your postcode and we will confirm.
Is black mould dangerous?
Damp and mould can affect health, particularly for people with asthma, allergies, weak immune systems, children and older people, according to NHS and government guidance. It should be dealt with rather than lived with.
Is PIV or MVHR better for condensation?
For most existing homes with general condensation, PIV plus good extract fans is the most cost-effective fix. MVHR suits airtight, well-insulated homes and full renovations.
What is the price of a condensation fix in Southall?
Guide prices for Southall 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 Southall?
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 Southall and get a written list of causes and fixes.
Condensation and mould fixes near Southall
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