Condensation and mould ventilation fixes in Surrey

In Surrey, condensation and mould are usually at their worst between October and March.

If you are anywhere in Surrey, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Staines, Banstead, Leatherhead, Ewell and Woking.

Condensation & mould in Surrey at a glance

Area: Surrey
Towns listed: 35, largest Woking
Postcode districts: KT12, TW16, TW15, TW16, KT12 and TW16
Price region: South East
Survey: Free survey (UK mainland)

What condensation and mould ventilation fixes involves

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 Surrey

Condensation and mould ventilation fixes guide prices in Surrey
Work	Guide price
New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan)	£490–£825 inc VAT
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£875–£1,525 inc VAT
Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan)	£380–£650 inc VAT
Condensation and mould ventilation survey with written findings (per home)	£140–£250 inc VAT

Guide prices using South East rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.

When to get it looked at

Water running down windows on cold mornings
Musty smell in bedrooms or wardrobes
Peeling paint or wallpaper in bathrooms

Rules in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). Serious damp and mould is a hazard under the Housing Health and Safety Rating System, and social landlords now have fixed timescales under Awaab's Law.

How the job runs

Survey
Find the cause
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Fix
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Towns we cover in Surrey

Questions about condensation and mould ventilation fixes in Surrey

Are prices different in Surrey?

Our guide prices are adjusted by region. In Surrey we use South East rates, so new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £490 to £825 inc VAT per fan.

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.

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.

Is the survey free in Surrey?

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.

Which rules apply to ventilation in Surrey?

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.

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