Holyhead, Gwynedd and Anglesey
Condensation and mould ventilation fixes in Holyhead
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Holyhead and LL65.
- From £425 inc VAT per fan
- Free survey

We survey Holyhead homes for condensation with meters, not guesswork, and explain what we find.
Work in Holyhead follows the rules for Wales and finishes with a written record of what was fitted and how it was set up.
Condensation and mould fixes in Holyhead at a glance
- Town
- Holyhead, Gwynedd and Anglesey
- Postcode districts
- LL65
- Nearby
- Bangor (22 miles)
- Price region
- Wales
- Survey
- Free survey (UK mainland)
What the work involves
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.
Guide prices in Holyhead
| Work | Guide price |
|---|---|
| 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 |
Guide prices using Wales rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Common reasons people call
- Someone in the home with asthma or allergies made worse by damp
- Black mould on window reveals, ceilings or behind furniture
- Water running down windows on cold mornings
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 Holyhead
Is the survey free in Holyhead?
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.
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.
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.
How do I get a price for a condensation fix in Holyhead?
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 Holyhead do you work in?
All of Gwynedd and Anglesey. Near Holyhead that includes Bangor.
Get a guide price online, then we confirm the plan on a free survey in Holyhead.
Condensation and mould fixes near Holyhead
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