Cosham, Hampshire
Condensation and mould ventilation fixes in Cosham
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Cosham and PO2, PO3 and PO6.
- From £490 inc VAT per fan
- Free survey
We survey Cosham homes for condensation with meters, not guesswork, and explain what we find.
Whether the property is in the middle of Cosham or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.
Condensation and mould fixes in Cosham at a glance
- Town
- Cosham, Hampshire
- Postcode districts
- PO2, PO3 and PO6
- Nearby
- Waterlooville (3 miles), Havant (4 miles) and Portsmouth (4 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
What the work involves
Ventilation is usually the biggest part of the cure, but not the only part. 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.
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 Cosham
| Work | Guide price |
|---|---|
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £380–£650 inc VAT |
| Condensation and mould ventilation survey with written findings (per home) | £140–£250 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £490–£825 inc VAT |
Guide prices using South East rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Common reasons people call
- 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 Cosham
What area around Cosham do you work in?
All of Hampshire. Near Cosham that includes Waterlooville, Havant, Portsmouth and Southsea.
How much does a condensation survey cost?
A ventilation survey with written findings costs £125 to £225 including VAT. If we are surveying for an installation we quote for, the survey is free.
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.
Do you cover Cosham and nearby?
Yes. We cover Cosham and nearby places including Waterlooville, Havant, Portsmouth and Southsea. Send your postcode and we will confirm.
What is the price of a condensation fix in Cosham?
Guide prices for Cosham use South East rates: new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £490 to £825 inc VAT per fan. We confirm a fixed price in writing before any work starts.
We can log humidity in your Cosham home afterwards so you can see the improvement.
Condensation and mould fixes near Cosham
More services in Cosham
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