Holywood, County Down
Condensation and mould ventilation fixes in Holywood
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Holywood and BT3, BT4 and BT18.
- From £410 inc VAT per fan
- By arrangement

Mould in a Holywood bedroom or bathroom is almost always a ventilation problem first.
Whether the property is in the middle of Holywood 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 Holywood at a glance
- Town
- Holywood, County Down
- Postcode districts
- BT3, BT4 and BT18
- Nearby
- Dundonald (3 miles), Newtownabbey (4 miles) and Belfast (5 miles)
- Price region
- Northern Ireland
- Survey
- By arrangement, travel quoted first
Condensation and mould fixes for Holywood homes
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 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 Holywood
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £725–£1,275 inc VAT |
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £315–£550 inc VAT |
| Condensation and mould ventilation survey with written findings (per home) | £115–£205 inc VAT |
Guide prices using Northern Ireland rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first. Travel is quoted separately for this area.
Signs it is time to call us
- Damp patches that dry out in summer and return in winter
- Someone in the home with asthma or allergies made worse by damp
- Black mould on window reveals, ceilings or behind furniture
Rules that apply in Northern Ireland
Northern Ireland has its own building regulations, with ventilation guidance in Technical Booklet K. Rented homes in Northern Ireland must meet fitness and repair duties, which include dealing with serious damp.
Questions from Holywood
Do you cover Holywood and nearby?
Yes. We cover Holywood and nearby places including Dundonald, Newtownabbey, Belfast and Castlereagh. Send your postcode and we will confirm.
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.
What is the price of a condensation fix in Holywood?
Guide prices for Holywood use Northern Ireland rates: new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £410 to £675 inc VAT per fan. We confirm a fixed price in writing before any work starts.
Is the survey free in Holywood?
Visits here are by arrangement. Because of the ferry or long travel involved, we quote travel separately and in writing before you commit, and we can often combine visits to keep the cost down.
Book a condensation survey in Holywood and get a written list of causes and fixes.
Condensation and mould fixes near Holywood
More services in Holywood
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