Chesham, Buckinghamshire
Condensation and mould ventilation fixes in Chesham
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Chesham and HP5, HP6 and HP7.
- From £490 inc VAT per fan
- Free survey

In Chesham, condensation and mould are usually at their worst between October and March.
Chesham is about 81 miles from our base in Great Barr, Birmingham. We book Chesham visits by appointment and confirm the date in writing. 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 Chesham at a glance
- Town
- Chesham, Buckinghamshire
- Postcode districts
- HP5, HP6 and HP7
- Nearby
- Amersham on the Hill (2 miles), Amersham (2 miles) and Berkhamsted (4 miles)
- Price region
- South East
- 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.
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 Chesham
| Work | Guide price |
|---|---|
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £490–£825 inc VAT |
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £875–£1,525 inc VAT |
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £380–£650 inc VAT |
These ranges use our South East rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Signs it is time to call us
- 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). Serious damp and mould is a hazard under the Housing Health and Safety Rating System, and social landlords now have fixed timescales under Awaab's Law.
Questions from Chesham
Is the survey free in Chesham?
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.
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.
How do I get a price for a condensation fix in Chesham?
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.
What area around Chesham do you work in?
All of Buckinghamshire. Near Chesham that includes Amersham on the Hill, Amersham, Berkhamsted and Chorleywood.
Send us photos of the mould and your fans and we will give a first view for your Chesham home.
Condensation and mould fixes near Chesham
More services in Chesham
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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.