Condensation and mould ventilation fixes in West Sussex

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

We carry out condensation and mould ventilation fixes across West Sussex, including Worthing, Bognor Regis, Littlehampton, Horsham and Haywards Heath. Prices use South East rates. Surveys for new installations are free on the UK mainland, with a written quote afterwards.

Condensation & mould in West Sussex at a glance

Area: West Sussex
Towns listed: 16, largest Crawley
Postcode districts: RH10, BN6, BN45, BN18, PO21 and PO20
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.

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.

Survey and findings

Humidity and surface readings, existing fans flow-tested, and a written list of causes and fixes.

Guide prices in West Sussex

Condensation and mould ventilation fixes guide prices in West Sussex
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.

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 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 West Sussex

Questions about condensation and mould ventilation fixes in West Sussex

Which towns in West Sussex do you cover?

All of West Sussex, including Worthing, Bognor Regis, Littlehampton, Horsham and Haywards Heath. If your town is not listed, send the postcode and we will confirm.

Is PIV or MVHR better for condensation?

For most existing homes with general condensation, PIV plus good extract fans is the most cost-effective fix. MVHR suits airtight, well-insulated homes and full renovations.

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.

Are prices different in West Sussex?

Our guide prices are adjusted by region. In West Sussex 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 West Sussex?

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.

Get a guide price online, then we confirm the plan on a free survey in West Sussex.