Positive input ventilation (PIV) in Maldon

For a typical Maldon semi or terrace, a loft PIV unit is often the quickest way to dry the house out.

For positive input ventilation (PIV) in Maldon, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.

PIV in Maldon at a glance

Town: Maldon, Essex
Postcode districts: CM3, CM8 and CM9
Nearby: Witham (5 miles), Chelmsford (9 miles) and Rochford (10 miles)
Price region: East of England
Survey: Free survey (UK mainland)

What the work involves

Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole. PIV works well in houses and flats with general condensation on windows and cold walls.

PIV with fan upgrades

PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.

Loft-mounted PIV

The most common option for houses with a loft. Usually fitted in half a day.

Guide prices in Maldon

Positive input ventilation (PIV) guide prices in Maldon
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£825–£1,475 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£1,050–£1,775 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£150–£310 inc VAT

East of England rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

When to get it looked at

Black mould on window reveals and in corners of bedrooms
Musty smell in wardrobes or behind furniture
The house feels stuffy and damp rather than cold

Rules that apply in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.

Questions from Maldon

What area around Maldon do you work in?

All of Essex. Near Maldon that includes Witham, Chelmsford, Rochford and Rayleigh.

How much does PIV cost to install?

A loft-mounted PIV unit usually costs £795 to £1,395 including VAT supplied and fitted, and £995 to £1,695 for a wall-mounted unit in a flat. A heater module adds around £145 to £295.

Does PIV really stop condensation?

PIV reduces condensation in most homes because it dilutes moist air and keeps it moving, but it works best alongside working extract fans in the kitchen and bathroom. Leaks, rising damp or a cold bridge need fixing separately.

Do you cover Maldon and nearby?

Yes. We cover Maldon and nearby places including Witham, Chelmsford, Rochford and Rayleigh. Send your postcode and we will confirm.

What is the price of a PIV unit in Maldon?

Guide prices for Maldon use East of England rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £825 to £1,475 inc VAT per home. We confirm a fixed price in writing before any work starts.

Send a photo of your loft hatch area and landing ceiling for a quicker Maldon quote.