Services
Condensation control and ventilation
Humidity-controlled fans, positive input ventilation and the habits that keep windows dry, after a visit that logs the air.
Condensation visit £95, extractor fans £320, PIV units £595
Seven in ten of the damp surveys we do find condensation, on its own or as the main cause. It is not a building fault. It is what happens when a modern household lives in a house that has been sealed up: new windows, blocked fireplaces, no air bricks, and four people drying washing indoors.
A condensation visit leaves a small logger in the house for a week, recording temperature and humidity every ten minutes, so we can see exactly when the air gets wet and what is doing it. Most homes need a habit change and one fan; some need more.
Humidity-controlled extractor fans in the kitchen and bathroom switch themselves on when the air gets wet and run quietly until it is dry. Positive input ventilation is a unit in the loft that pushes filtered, slightly warmed air into the house and lets the wet air out through the normal gaps; it suits terraces and flats with no through draught.
What we do not sell is a dehumidifier contract or a mould-proof paint as a cure. They treat the symptom. The condensation page has the whole picture, including what to try before you spend anything.
What is included
- A week-long humidity and temperature log
- A plain-English account of what makes the water
- Fans sized to the room and set to humidity
- PIV units with a filter and a heater
- A follow-up reading after a month
What it costs
A condensation visit with a hygrometer log is £95; humidity-controlled extractor fans £320 fitted; positive input ventilation units £595 fitted. Every treatment starts with a survey, because a survey decides what, if anything, needs doing.
A survey decides
Questions about condensation and ventilation
Will mould-resistant paint fix it?
It will slow the mould coming back on that wall, and the condensation will go somewhere else. Use it after the ventilation is right, not instead.
Is PIV expensive to run?
About as much as a light bulb when the heater is off; a few pounds a month more in winter with it on.
Is condensation the landlord's problem or the tenant's?
Often both. Landlords must keep a home fit to live in and ventilation working; tenants control heating and drying washing. Our report says which is which, fairly.
Not sure what it is? That is what a survey is for.
An hour on site, outside first, with a meter, a hygrometer and a thermal camera, and a written report in three working days. About a third of our reports recommend no work by us at all.