Diss, Norfolk
Condensation and mould ventilation fixes in Diss
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Diss and IP21, IP22 and IP23.
- From £465 inc VAT per fan
- Free survey

We survey Diss homes for condensation with meters, not guesswork, and explain what we find.
Whether the property is in the middle of Diss or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.
Condensation and mould fixes in Diss at a glance
- Town
- Diss, Norfolk
- Postcode districts
- IP21, IP22 and IP23
- Nearby
- Attleborough (10 miles), Stowmarket (14 miles) and Thetford (15 miles)
- Price region
- East of England
- Survey
- Free survey (UK mainland)
How we approach condensation and mould fixes in Diss
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.
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 Diss
| Work | Guide price |
|---|---|
| Condensation and mould ventilation survey with written findings (per home) | £130–£235 inc VAT |
| 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–£1,475 inc VAT |
These ranges use our East of England rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Common reasons people call
- Damp patches that dry out in summer and return in winter
- Someone in the home with asthma or allergies made worse by damp
- Black mould on window reveals, ceilings or behind furniture
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 Diss
What area around Diss do you work in?
All of Norfolk. Near Diss that includes Attleborough, Stowmarket, Thetford and Bowthorpe.
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.
Do you cover Diss and nearby?
Yes. We cover Diss and nearby places including Attleborough, Stowmarket, Thetford and Bowthorpe. Send your postcode and we will confirm.
What is the price of a condensation fix in Diss?
Guide prices for Diss use East of England 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 Diss and get a written list of causes and fixes.
Condensation and mould fixes near Diss
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.