Keynsham, Somerset
Condensation and mould ventilation fixes in Keynsham
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Keynsham and BS14, BS30 and BS31.
- From £465 inc VAT per fan
- Free survey

In Keynsham, condensation and mould are usually at their worst between October and March.
Keynsham is about 82 miles from our base in Great Barr, Birmingham. We book Keynsham visits by appointment and confirm the date in writing. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
Condensation and mould fixes in Keynsham at a glance
- Town
- Keynsham, Somerset
- Postcode districts
- BS14, BS30 and BS31
- Nearby
- Kingswood (3 miles), Mangotsfield (5 miles) and Bristol (5 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
What the work involves
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.
Guide prices in Keynsham
| 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 |
South West rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
Signs it is time to call us
- Musty smell in bedrooms or wardrobes
- Peeling paint or wallpaper in bathrooms
- Damp patches that dry out in summer and return in winter
Rules that apply 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.
Questions from Keynsham
What area around Keynsham do you work in?
All of Somerset. Near Keynsham that includes Kingswood, Mangotsfield, Bristol and Bishopsworth.
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.
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.
Do you cover Keynsham and nearby?
Yes. We cover Keynsham and nearby places including Kingswood, Mangotsfield, Bristol and Bishopsworth. Send your postcode and we will confirm.
What is the price of a condensation fix in Keynsham?
Guide prices for Keynsham use South West rates: 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. We confirm a fixed price in writing before any work starts.
Book a condensation survey in Keynsham and get a written list of causes and fixes.
Condensation and mould fixes near Keynsham
More services in Keynsham
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