Welling, Greater London
Condensation and mould ventilation fixes in Welling
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Welling and DA6, DA15 and DA16.
- From £525 inc VAT per fan
- Free survey

For tenants, landlords and homeowners in Welling, the common question is why the mould keeps coming back.
Work in Welling 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 Welling at a glance
- Town
- Welling, Greater London
- Postcode districts
- DA6, DA15 and DA16
- Nearby
- Abbey Wood (2 miles), Plumstead (2 miles) and Bexley (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
Condensation and mould fixes for Welling homes
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 Welling
| 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 |
London rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
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
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 Welling
How do I get a price for a condensation fix in Welling?
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.
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 area around Welling do you work in?
All of Greater London. Near Welling that includes Abbey Wood, Plumstead, Bexley and Sidcup.
Do you cover Welling and nearby?
Yes. We cover Welling and nearby places including Abbey Wood, Plumstead, Bexley and Sidcup. Send your postcode and we will confirm.
Book a condensation survey in Welling and get a written list of causes and fixes.
Condensation and mould fixes near Welling
More services in Welling
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.