Harwich, Essex
Condensation and mould ventilation fixes in Harwich
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Harwich and CO12, IP10 and IP11.
- From £465 inc VAT per fan
- Free survey

In Harwich, condensation and mould are usually at their worst between October and March.
We cover Harwich and the surrounding CO12, IP10 and IP11 postcodes as part of our work across Essex. 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 Harwich at a glance
- Town
- Harwich, Essex
- Postcode districts
- CO12, IP10 and IP11
- Nearby
- Felixstowe (3 miles), Walton-on-the-Naze (6 miles) and Frinton-on-Sea (8 miles)
- Price region
- East of England
- Survey
- Free survey (UK mainland)
How we approach condensation and mould fixes in Harwich
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.
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 Harwich
| Work | Guide price |
|---|---|
| Condensation and mould ventilation survey with written findings (per home) | £130–£235 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £465–£775 inc VAT |
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £825–£1,475 inc VAT |
These ranges use our East of England rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Signs it is time to call us
- Water running down windows on cold mornings
- Musty smell in bedrooms or wardrobes
- Peeling paint or wallpaper in bathrooms
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 Harwich
Do you cover Harwich and nearby?
Yes. We cover Harwich and nearby places including Felixstowe, Walton-on-the-Naze, Frinton-on-Sea and Kesgrave. Send your postcode and we will confirm.
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.
Will a dehumidifier fix condensation?
A dehumidifier helps in one room but treats the symptom. Fixing the extract in the wet rooms, and adding whole-home ventilation where needed, removes moisture before it spreads.
What is the price of a condensation fix in Harwich?
Guide prices for Harwich use East of England rates: new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £465 to £775 inc VAT per fan. We confirm a fixed price in writing before any work starts.
Is the survey free in Harwich?
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.
If we fit the fix, the Harwich survey is free.
Condensation and mould fixes near Harwich
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