Condensation and mould ventilation fixes in Mid Glamorgan

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

Mid Glamorgan 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 Mid Glamorgan at a glance

Area: Mid Glamorgan, Wales
Towns listed: 14, largest Rhondda
Postcode districts: CF46, CF43, CF45, CF31, CF32 and CF40
Price region: Wales
Survey: Free survey (UK mainland)

What the work involves

Mould needs that damp surface to grow. 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.

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.

Fan upgrades

Weak or loft-vented fans replaced and ducted outside, with humidity control.

Guide prices in Mid Glamorgan

Condensation and mould ventilation fixes guide prices in Mid 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

These ranges use our Wales rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.

Common reasons people call

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 Mid Glamorgan

Questions about condensation and mould ventilation fixes in Mid Glamorgan

Are prices different in Mid Glamorgan?

Our guide prices are adjusted by region. In Mid 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.

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.

Is the survey free in Mid Glamorgan?

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.

Which rules apply to ventilation in Mid 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.

Send us photos of the mould and your fans and we will give a first view for your Mid Glamorgan home.