Condensation and mould ventilation fixes in Hampshire

In Hampshire homes, black mould usually comes down to the same few causes: weak fans, loft-vented ducts and no background ventilation.

Hampshire has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.

Condensation & mould in Hampshire at a glance

Area: Hampshire
Towns listed: 34, largest Southampton
Postcode districts: PO4, SO18, SO19, SO18, SO50 and SO16
Price region: South East
Survey: Free survey (UK mainland)

What the work involves

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. 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.

Mould treatment advice

How to clean and treat affected areas once the cause is fixed.

Guide prices in Hampshire

Condensation and mould ventilation fixes guide prices in Hampshire
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
Condensation and mould ventilation survey with written findings (per home)	£140–£250 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.

Common reasons people call

Musty smell in bedrooms or wardrobes
Peeling paint or wallpaper in bathrooms
Damp patches that dry out in summer and return in winter

Rules in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. 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.

How the job runs

Survey
Find the cause
Recommend
Fix
Check back

Towns we cover in Hampshire

Questions about condensation and mould ventilation fixes in Hampshire

Which towns in Hampshire do you cover?

All of Hampshire, including Portsmouth, Basingstoke, Gosport, Waterlooville and Farnborough. If your town is not listed, send the 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.

Are prices different in Hampshire?

Our guide prices are adjusted by region. In Hampshire we use South East rates, so 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.

Is the survey free in Hampshire?

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.

Book a condensation survey in Hampshire and get a written list of causes and fixes.