Portsmouth, Hampshire
Condensation and mould ventilation fixes in Portsmouth
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Portsmouth and PO1, PO2 and PO5.
- From £490 inc VAT per fan
- Free survey
In Portsmouth, condensation and mould are usually at their worst between October and March.
Whether the property is in the middle of Portsmouth 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 Portsmouth at a glance
- Town
- Portsmouth, Hampshire
- Postcode districts
- PO1, PO2 and PO5
- Nearby
- Southsea (1 mile), Gosport (2 miles) and Cosham (4 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
How we approach condensation and mould fixes in Portsmouth
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.
Survey and findings
Humidity and surface readings, existing fans flow-tested, and a written list of causes and fixes.
Fan upgrades
Weak or loft-vented fans replaced and ducted outside, with humidity control.
Guide prices in Portsmouth
| Work | Guide price |
|---|---|
| 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 |
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £875–£1,525 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
- Damp patches that dry out in summer and return in winter
- Someone in the home with asthma or allergies made worse by damp
- Black mould on window reveals, ceilings or behind furniture
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 Portsmouth
Do you cover Portsmouth and nearby?
Yes. We cover Portsmouth and nearby places including Southsea, Gosport, Cosham and South Hayling. Send your postcode and we will confirm.
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.
What is the price of a condensation fix in Portsmouth?
Guide prices for Portsmouth 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.
Is the survey free in Portsmouth?
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.
Send us photos of the mould and your fans and we will give a first view for your Portsmouth home.
Condensation and mould fixes near Portsmouth
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