Condensation and mould ventilation fixes in Somerset

We survey Somerset homes for condensation with meters, not guesswork, and explain what we find.

Every job in Somerset gets a written quote before it starts and a commissioning record when it finishes. We cover Taunton, Yeovil, Bridgwater, Portishead and Frome and the villages around them.

Condensation & mould in Somerset at a glance

Area: Somerset
Towns listed: 19, largest Bath
Postcode districts: BA16, TA24, BS3, BS13, BA4 and BA5
Price region: South West
Survey: Free survey (UK mainland)

How we do it

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 needs that damp surface to grow.

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.

Whole-home ventilation

PIV, continuous extract or MVHR where moisture is spread through the house.

Guide prices in Somerset

Condensation and mould ventilation fixes guide prices in Somerset
Work	Guide price
New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan)	£465–£775 inc VAT
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£825–£1,450 inc VAT
Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan)	£360–£625 inc VAT
Condensation and mould ventilation survey with written findings (per home)	£130–£235 inc VAT

South West rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

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 in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). Damp and mould is assessed as a hazard under the Housing Health and Safety Rating System in England.

How the job runs

Survey
Find the cause
Recommend
Fix
Check back

Towns we cover in Somerset

Questions about condensation and mould ventilation fixes in Somerset

Which rules apply to ventilation in Somerset?

In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.

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. If we are surveying for an installation we quote for, the survey is free.

Which towns in Somerset do you cover?

All of Somerset, including Taunton, Yeovil, Bridgwater, Portishead and Frome. If your town is not listed, send the postcode and we will confirm.

Are prices different in Somerset?

Our guide prices are adjusted by region. In Somerset we use South West rates, so new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £465 to £775 inc VAT per fan.

Get a guide price online, then we confirm the plan on a free survey in Somerset.