Condensation and mould ventilation fixes in County Down

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

We carry out condensation and mould ventilation fixes across County Down, including Newry, Banbridge, Dundonald, Holywood and Downpatrick. Prices use Northern Ireland rates. Work here is by arrangement, with travel quoted in writing first.

Condensation & mould in County Down at a glance

Area: County Down, Northern Ireland
Towns listed: 8, largest Bangor
Postcode districts: BT20, BT5, BT6, BT16, BT19 and BT35
Price region: Northern Ireland
Survey: By arrangement, travel quoted first

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.

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.

Survey and findings

Humidity and surface readings, existing fans flow-tested, and a written list of causes and fixes.

Guide prices in County Down

Condensation and mould ventilation fixes guide prices in County Down
Work	Guide price
New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan)	£410–£675 inc VAT
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

These ranges use our Northern Ireland rates. Prices include VAT at 20%. You get a fixed written price before any work is booked. Travel is quoted separately for this area.

When to get it looked at

Peeling paint or wallpaper in bathrooms
Damp patches that dry out in summer and return in winter
Someone in the home with asthma or allergies made worse by damp

Rules 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.

How the job runs

Survey
Find the cause
Recommend
Fix
Check back

Towns we cover in County Down

Questions about condensation and mould ventilation fixes in County Down

Are prices different in County Down?

Our guide prices are adjusted by region. In County Down we use Northern Ireland rates, so 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.

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 much does a condensation survey cost?

A ventilation survey with written findings costs £125 to £225 including VAT.

Is the survey free in County Down?

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.

Which rules apply to ventilation in County Down?

In Northern Ireland, ventilation is covered by Technical Booklet K of the Building Regulations (Northern Ireland). Workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993.

Book a condensation survey in County Down and get a written list of causes and fixes.