Condensation and mould ventilation fixes in West Glamorgan

For West Glamorgan homes with streaming windows every morning, the fix is usually cheaper than people expect.

If you are anywhere in West Glamorgan, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Ystalyfera, Swansea, Neath, Briton Ferry and Gorseinon.

Condensation & mould in West Glamorgan at a glance

Area: West Glamorgan, Wales
Towns listed: 6, largest Swansea
Postcode districts: SA9, SA1, SA2, SA7, SA10 and SA7
Price region: Wales
Survey: Free survey (UK mainland)

How we do it

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. We tell you if that is what we find rather than selling a fan that will not help.

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 West Glamorgan

Condensation and mould ventilation fixes guide prices in West Glamorgan
Work	Guide price
New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan)	£425–£700 inc VAT
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£750–£1,325 inc VAT
Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan)	£330–£575 inc VAT
Condensation and mould ventilation survey with written findings (per home)	£120–£215 inc VAT

Wales rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

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 in Wales

In Wales, ventilation follows the Welsh Approved Document F rather than the English version, with building control checking notifiable work. In Wales, damp and mould is one of the matters that decides whether a rented home is fit for human habitation.

How the job runs

Survey
Find the cause
Recommend
Fix
Check back

Towns we cover in West Glamorgan

Questions about condensation and mould ventilation fixes in West Glamorgan

Which rules apply to ventilation in West Glamorgan?

In Wales, the Welsh Government's own Approved Document F (2022 edition) applies to ventilation in homes, with a new edition taking effect on 4 March 2027. Rented homes must be fit for human habitation under the Renting Homes (Wales) Act 2016, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.

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.

Which towns in West Glamorgan do you cover?

All of West Glamorgan, including Ystalyfera, Swansea, Neath, Briton Ferry and Gorseinon. If your town is not listed, send the postcode and we will confirm.

Are prices different in West Glamorgan?

Our guide prices are adjusted by region. In West Glamorgan we use Wales rates, so new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £425 to £700 inc VAT per fan.

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