Condensation and mould ventilation fixes in Powys

Mould in a Powys bedroom or bathroom is almost always a ventilation problem first.

We carry out condensation and mould ventilation fixes across Powys, including Newtown. Prices use Wales rates. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.

Condensation & mould in Powys at a glance

Area: Powys, Wales
Towns listed: 1, largest Newtown
Postcode districts: SY16
Price region: Wales
Survey: Free survey (UK mainland)

What condensation and mould ventilation fixes 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. Ventilation is usually the biggest part of the cure, but not the only part.

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.

Fan upgrades

Weak or loft-vented fans replaced and ducted outside, with humidity control.

Guide prices in Powys

Condensation and mould ventilation fixes guide prices in Powys
Work	Guide price
New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan)	£425–£700 inc VAT
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

Black mould on window reveals, ceilings or behind furniture
Water running down windows on cold mornings
Musty smell in bedrooms or wardrobes

Rules in Wales

In Wales, ventilation follows the Welsh Approved Document F rather than the English version, with building control checking notifiable work. In Wales, damp and mould is one of the matters that decides whether a rented home is fit for human habitation.

How the job runs

Survey
Find the cause
Recommend
Fix
Check back

Towns we cover in Powys

Newtown

Questions about condensation and mould ventilation fixes in Powys

Is the survey free in Powys?

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.

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.

Which rules apply to ventilation in Powys?

In Wales, the Welsh Government's own Approved Document F (2022 edition) applies to ventilation in homes, with a new edition taking effect on 4 March 2027. Rented homes must be fit for human habitation under the Renting Homes (Wales) Act 2016, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.

Which towns in Powys do you cover?

All of Powys, including Newtown. If your town is not listed, send the postcode and we will confirm.

Ask for a Powys visit and we will test your existing fans before recommending anything.