Caerphilly, Gwent
Condensation and mould ventilation fixes in Caerphilly
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Caerphilly and CF14, CF15 and CF83.
- From £425 inc VAT per fan
- Free survey

For tenants, landlords and homeowners in Caerphilly, the common question is why the mould keeps coming back.
Whether the property is in the middle of Caerphilly 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 Caerphilly at a glance
- Town
- Caerphilly, Gwent
- Postcode districts
- CF14, CF15 and CF83
- Nearby
- Rhiwbina (3 miles), Whitchurch (4 miles) and Risca (6 miles)
- Price region
- Wales
- Survey
- Free survey (UK mainland)
How we approach condensation and mould fixes in Caerphilly
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.
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 Caerphilly
| 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 |
These ranges use our Wales rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
When to get it looked at
- Musty smell in bedrooms or wardrobes
- Peeling paint or wallpaper in bathrooms
- Damp patches that dry out in summer and return in winter
Rules that apply in Wales
Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. In Wales, damp and mould is one of the matters that decides whether a rented home is fit for human habitation.
Questions from Caerphilly
Is the survey free in Caerphilly?
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.
Is black mould dangerous?
Damp and mould can affect health, particularly for people with asthma, allergies, weak immune systems, children and older people, according to NHS and government guidance. It should be dealt with rather than lived with.
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 do I get a price for a condensation fix in Caerphilly?
Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.
What area around Caerphilly do you work in?
All of Gwent. Near Caerphilly that includes Rhiwbina, Whitchurch, Risca and Pontypridd.
Ask for a Caerphilly visit and we will test your existing fans before recommending anything.
Condensation and mould fixes near Caerphilly
More services in Caerphilly
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.