How to Stop Condensation on Windows

How to Stop Condensation on Windows

How to Stop Condensation on Windows

At I-Sells, we know how detrimental condensation can end up being for your home if it is not treated properly, with mould being a dangerous by-product of poor ventilation. That is why we are going to be sharing with you, how to stop condensation on windows, but before we start, let us explain a little bit about condensation.


Condensation occurs when heat and moisture in the air are confined to a certain area, as this heat tries and fails to escape, droplets of water are created on cold surfaces. A good way to think about this is having a hot shower on a cold day and not opening your window.

The reason condensation creates mould is that a damp and humid environment is the optimum condition for mould to grow. In regards to windows, it is a big problem if there is mould on your windows (it can usually be found in the corners of the windowpane or the walls connected to the window).

The reasoning is that mould particles can travel through the air without us seeing it, incidentally, this means opening a window with mould on it runs the risk of that mould being blown inside your room alongside the fresh air.

That being said, condensation is not the only cause of mould, it can occur from leaks in the structure of a building too.

Now we have an understanding of condensation and the challenges it brings, let’s offer some solutions you can try at home.

What stops condensation on windows?


In this section, we are going to address some frequently asked questions when it comes to condensation reduction.

How to stop condensation on double-glazed / single-glazed windows?

 A frequently asked question regarding both single-glazed and double-glazed windows is:

  • how to stop condensation on double glazed windows
  • how to stop condensation on single glazed windows

and the answer is the same for both – ventilation! The level of humidity outside and inside the home must be balanced, it can be as simple as opening a window for 20 minutes a day in a room. You can open windows downstairs or upstairs, allowing the hot air to escape upstairs and having the downstairs receive fresh air from outside. For the most effective combination, extractor fans add a huge boost to ventilation management in your home.

How to stop condensation on windows overnight

Again, the answer is ventilation as we mentioned before. Though it must be said that everybody’s home is different, and sometimes trial and error in locating what is causing humidity may mean you won’t stop condensation overnight. You may need specialist equipment like a hygrometer or a dehumidifier.

Does vinegar stop condensation on windows?

Yes, Vinegar is a mild acid and is known for its cleaning properties, it can also get rid of mould. Even though the smell is not permanent, it may not be the best solution for people with a sharp noses.

For a more in-depth article specifically on condensation management as a whole, head over to our blog.

As mentioned, ventilation is key and the best way to stop condensation on windows in conjunction with a frequent ventilation routine, with that in mind, we will be sharing with you our best solutions for condensation. 

How to stop condensation on windows

So now we know the dangers that can be presented by leaving condensation on your windows and temporary solutions that can stop condensation on windows and keep mould away, let’s take a look at some permanent solutions.

Extractor fans work by aiding the ventilation process, removing humid and stale air out through their vent. When combined with a daily ventilation routine, (unless there is leaking in your house) condensation and mould will be a thing of the past. It might be difficult to know if you need an extractor fan, but if condensation or mould is common in your house the likelihood is you do need one.

Kitchen range

Extractor fans will facilitate the removal of humid air in the kitchen at a fraction of the cost and sound too. With that being said, we’re happy to share with your our kitchen extractor range.

Kair Smart 100mm Intelligent Extractor Fan with Humidistat Timer & Data Logger

The Kair Smart 100mm Intelligent Extractor Fan with humidistat Timer & Data Logger is one of our best bathroom extractor fans with humidistat, featuring a 5-year warranty on parts included.

It boasts a Humidistat timer which means the fan will turn off itself after the room’s moisture level goes beneath a certain level. Along with smart sensors that constantly analyse the room it’s in.

Depending on your installation option, you can opt to pull a cord on the fan (or use a remote switch) to activate the boost mode, quickly ensuring any humidity or odour is dealt with at a faster rate.

The fan is double insulated meaning there is no earth connection, giving this fan the option of being installed on a ceiling, wall or window.

For a full breakdown of information, functions and price click here to see the full list of features and specifications.

Kair Mini Single Room Heat Recovery Ventilator – White Outer Grille -(min 120mm hole diameter)

The Kair Mini Single Room Heat Recovery Ventilator – White outer Grille – (min 120mm hole diameter) offers higher levels of indoor air quality whilst recycling heat that is normally wasted with traditional extractor fans. It adds fresh & filtered air into your home whilst extracting stale, moist air.

Due to the rise in energy bills, this product can help save that little bit more money on your bills whilst also reducing your carbon footprint, as this ventilator only uses 1.8 Watts and is able to recycle up to 81% of heat and energy which would otherwise be wasted. It does this through one of its fan operation modes called “ventilation with energy recovery”. To see the full list of features and specifications, head over to our website now.

Please note, the two aforementioned products can also be used as bathroom extractor fans, please consider this when looking through our bathroom extractor fan list below.

Bathroom range

Kair Guardian Power Pro PP100HTPLV Powerful Centrifugal Extractor Fan

The Kair Guardian Power Pro PP100HTPLV Powerful Centrifugal Extractor Fan features a 43,000-hour long-life motor and maintenance-free long-life ball bearings.

Alongside an energy-efficient EC motor, this model also offers two-speed options (which you can pre-select at installation at one set speed). The lowest speed clocks in at 15.5 decibels, meaning you can have efficient ventilation without the loudness of your standard extractor fan.

To view the full list of specifications and features, our website has all the information you need.

Kair Guardian Power Pro HTP

The Kair Guardian Power Pro HTP operates at an extremely low running cost, costing just 1p per day to run (using 28.00 pence per kWh as a comparison). Using its 100mm powerful centrifugal fan, this model can exhaust through long lengths of ducting up to 15M, or directly outside, showing amazing efficiency despite the low running costs of this model.

For a full understanding of this model’s pricing, features and specification, take a look at our website.

Kair Guardian Power Pro PP100P

The Kair Guardian Power Pro PP100P contains features such as the EC motor, double insulation and a shockproof, high-quality technopolymer casing. Whilst also being a financially friendly option to anybody on a limited budget.

To view this model and its full list of specifications, our website has all of the information you need.

Anti-Mould Paint

Anti-mould paint works by adding certain chemicals to paint which vary from manufacturer. Commonly, benzisothiazolone is found within anti-mould paint, a biocide which acts as a microbicide and fungicide that destroys mould upon contact. Below, we’ll share with you our Anti-mould paint products that will keep your home mould free. We supply two options:

Kair Anti Mould Paint 1 Litre White & Kair Anti Mould Paint 1 Litre Magnolia

Kair Anti Mould Paint is an excellent, premium quality, low odour anti-mould coating guaranteed to protect against unsightly and unhygienic black mould even when there is persistent condensation. Offering 5 years’ worth of protection against black mould growth on walls and ceilings.  We offer options in white and magnolia.

The unsurpassed performance is achieved by combining modern paint technology with highly advanced, proven biocides. The anti-mould biocide is combined throughout the paint film, which is formulated to impart toughness, elasticity, water resistance and durability to the finish. You’ll find with this product that it is:

  • Easy to use
  • Fast Drying
  • Low Odour
  • Ideal for walls and ceilings
  • Long-lasting protection
  • Matt Finish

For best results, you should wash mouldy surfaces with Kair Anti Mould Surface Cleanser Concentrate beforehand. As it is specifically designed to clean and treat mould growth areas.

Here for all of your ventilation needs


We at I-Sells endeavour to make sure our customers have all the information they need before making the choice to invest in our products. Be sure to visit our blog page to gain knowledge on the wide array of factors and issues surrounding ventilation, mould, condensation, and much more.

We hope to have helped you understand the importance of ventilation whilst also helping you understand how to stop condensation on windows.

We understand you may have more questions with regards to stopping condensation, please do not hesitate to contact us for more information with regard to ventilation in your bathroom or kitchen. If you’d like to send us an email, click here. For other contact options, see below:

Call us on 020 8463 9696

Visit us at our showroom:


Monday – Friday: 8:00am to 17:30pm
Saturday: 9:00am to 12:00pm
Sunday: Closed

15 St John’s Parade
DA14 6ES
United Kingdom

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