Condensation Control & Ventilation Systems in Derbyshire & Nottinghamshire
Condensation Control & Ventilation Systems in Derbyshire & Nottinghamshire

Condensation Control & Ventilation Solutions in Derbyshire (Derby) & Nottingham

One of the most common causes of dampness in buildings is ‘condensation’. Moisture is always present in the air, even if it cannot be seen. Cooking, heating, showering and washing and drying clothes further elevate moisture levels in homes.


Warm air holds more moisture than cold air. When warm air is cooled the amount of moisture it can hold reduces. If cooled far enough the air releases its excess moisture, forming droplets of water on sufficiently cool surfaces. This is known as ‘condensation’.


In the home condensation is most noticeable on cold mornings, often seen on windows, on the inside faces of external walls, or in places where air movement is restricted, such as in the corners of rooms and behind items of furniture placed close against walls, and even inside wardrobes.


The presence of condensation is often first indicated by the development of mould on walls, ceilings, and even furniture, clothes and other fabrics. Condensed water can go on to provide sufficient moisture to allow timbers to rot. Condensation is most problematic during the cold winter months, with the October to April period generally acknowledged as ‘condensation season’, although it can occur throughout the year.


Property Care Association - Guide to Dealing With Condensation

A helpful and informative guide to dealing with condensation and mould problems. This guide has been produced by the Property Care Association (PCA).


PCA Video - Importance of Ventilation

Find the Real Cause of your Condensation Problem with our Data Logging Service

Do you want to get a real insight into what is causing condensation and mould problems in your property?


If you do, read all about our condensation data logging service. The only way to get a true picture of what is really happening in your home.

Condensation Control & Ventilation Work Usually Involves:

To minimize surface condensation, it is necessary to do one or more of the following:


a) obtain low vapour pressures by ventilation (Extractor Fans/Units, Positive Input Ventilation (PIV) Units & Passyfier Air Vents and/or reduced moisture input to the building;


b) obtain high surface temperatures by providing more insulation and/or increasing the heat input.


All our ventilation installers hold electrical (Part P) and ventilation (Part F) qualifications. See the full list of qualifications held by our staff on our meet the team page.


Read our latest BLOG post - How to prevent ventilation equipment being badly installed within your home.


                     Condensation Control (Ventilation) Methods

Positive Input Ventilation (PIV) Units. - Supplied & Fitted Throughout Derbyshire & Nottinghamshire

We offer a range of positive input ventilation systems (PIV Units) to suit most property types.


Each property is unique and should be carefully surveyed by a ventilation surveyor to check it is suitable for the installation of a PIV unit.


Where a property is not suitable, we may have other ventilation solutions which could be installed, such as extractor fans and alternate flow fans.



PIV units have been preventing and curing condensation dampness related problems in homes for decades. They are also used to control other indoor air pollutants and have even proven to be an effective means for reducing Radon gas in some properties.


A positive input ventilation system gently forces air from the loft around a building (Roof Type). It reduces humidity and eliminates condensation, black mould and mildew. It is an effective and inexpensive way of eliminating black mould and takes maximum advantage of solar gain and warm air stratification.


Overall savings in central heating costs may be possible due to the recirculation of warm air at ceiling height.


The units are idea for most domestic properties, and also for second or holiday homes that are used infrequently.

The roof type PIV unit is positioned in the loft above the landing in a house or central hallway of a bungalow, the system then re- circulates air around the property.


For buildings without a roof space, a wall mounted PIV unit is available. The unit is normally placed within a central hallway.


We use a number of different types of PIV units, all of which have different features (Heaters etc).


As mentioned above, all properties are unique and therefore it is important to make sure that the PIV unit being installed is suitable for the property.


When we undertake a ventilation survey, our surveyor will discuss the different types of units to help you decide which is best for your property. Information leaflets are available to download below for some of the PIV units that we install.


To arrange a ventilation/ condensation control survey - Call DERBY 01332 960160   - Nottingham 0115 9304240 or use our online contact form.



SANO IPIV Unit (Roof Mounted)

Information leaflet for the SANO IPIV loft mounted unit.


SANO PIV LOFT H (Roof Mounted)

The SANO Intelligent PIV LOFT H is a loft mounted ultra quiet, low energy, low maintenance, home ventilation unit.


Auto Concure PIV Unit (Roof Mounted)

Auto Concure 20/20 Positive Input Ventilation Unit. A roof mounted heated PIV unit supplying fresh air to an entire property.



The SANO Intelligent PIV WALL H is a wall mounted ultra-quiet, low energy, low maintenance, home ventilation unit.


Extract Ventilation Fans/Systems -  Supplied & Fitted in Derbyshire & Nottingham.

MORI HR Alternate Flow Fan with Heat Retention


The MORI HR continuously running, low energy, ultra quiet, alternate flow supply and extract fan with heat retention for use in habitable areas such as living rooms, bedrooms, dining rooms, basements and hallways.


The unit helps a room “breathe” and reduces indoor air pollutants and humidity levels. The unit is ideal for tackling problems associated with condensation dampness such as mould growth.


We offer a supply and fitting service for the MORI HR Alternate Flow/Extract Fans.


MORI dMEV II Decentralised Mechanical Extract Ventilation (Fan)


A continuously running, low energy, ultra quiet extract fans for use in kitchens, utility rooms, bathrooms, shower rooms, en-suites and toilets.


We offer a supply and fitting service for extractor fans.




MORI-HR - Alternate Flow Supply & Extract Fan with Heat Retention

Information leaflet showing fulls details including performance data for the MORI-HR - Alternate Flow Supply & Extract Fan with Heat Retention.


MORI dMEV ll - De-Centralised Mechanical Extract Fan

Information leaflet showing fulls details including performance data for the MORI dMEV ll - De-Centralised Mechanical Extract Fan.


MORI MEV - Centralised Mechanical Extract Ventilation Unit

Centralised continuously running, low energy, ultra quiet extract fans that extract from multiple rooms such as kitchens, utility rooms, bathrooms, and toilets via a system of ductwork with a single discharge to atmosphere.


Ventilation Installations by CK Walker Damp & Timbers - All installed so that they comply with Approved Document F (Ventilation) of the Building Regulations

Non-Mechanical Ventilation for Condensation Control

Passyfier Air Vents

Passyfier air vents help remove moist air from the room to the outside. The Passyfier is different to standard air bricks as they prevent cold air/ draughts from coming into your property.


This is because the passyfier is fitted with a slab of mineral wool inside which prevents the cold air and draughts coming in but will allow the moisture out.


It operates continuously without noise 24 hours per day and can extract up to 2.3 litres of water per day.


The passyfier requires no electricity and is inserted in the wall where the problem exists.

These can be fitted in most rooms in a property though an electrical extractor fan is recommended for bathrooms and kitchens.




Get in Touch

You can contact us by calling 0115 9304240 or 01332 960160 or use our contact form.


Latest Case Studies

CK Walker Damp & Timbers feature in a damp proofing case study by Safeguard Europe.


Read about it here.

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CK Walker Damp & Timbers have been providing: Damp Proofing, Condensation Control, Re-Plastering, fungal decay & Woodworm solutions throughout Derbyshire & Nottingham since 1991. CK Walker LTD trading as CK Walker Damp & Timbers – Company Number 9072842 - Registered Office – Old Church Institute, Main Street, Mapperley, Ilkeston, Derbyshire, DE7 6BY All images and text on this website are protected by copyright. 2017 For all your damp proofing & timber treatment needs in Derbyshire & Nottingham, Call us on 01332 960160, 01629 352019 or 0115 9304240