Whistling Windows

The creepy whistling noise you hear coming from your windows on a cold windy night is, in fact, a telltale sign that your windows need maintenance. When strong winds pass through narrow gaps on your windows, they cause a whistling-like noise effect. Simply put, your window frames wear down. 

Low-quality aluminium could warp after some years. And once frames become deformed, they lose their sealing properties, thus letting air pass through gaps. As the sealing strip of the window ages, it loses its airtight properties and air passes through the cracks. This is when whistles occur! Customers, subsequently, should opt for high-quality aluminium products.

To prevent everything from the outset, and before windows are installed, ensure that all gaps between the frames and walls are sealed. This way, you solidify them and stop rainwater and wind come through. 

The best way to insulate traditional double-glazed windows is to fill wood chips between the two glass panels. The wood chips absorb excessive moisture and block the cold air from the lower part of the window.

To close large gaps between the wall and window frames, clean the gaps thoroughly first. Then use polystyrene to fill in the gaps–sand and paint if necessary. If the gaps are on the window frames themselves, you can apply plastic strips. 

C & A Window Systems Ltd is a commercial aluminium-installation company, with a vast range of aluminium products. Every product we use is of high-quality material and we always provide excellent customer service.

To find out more, call us now on 01787 477976 or email at: office@candawindowsystems.co.uk

Customise Your products

A personalised touch

Glass options

Contemporary designs that enhance security and privacy.

Integral Blinds

An attractive addition delivering privacy and shading when you need it.


Peace of mind starts when you get in touch and lasts for years.

steve arundellsteve arundell
13:43 02 Nov 23
Chris and Andy listen to what we wanted and their team then delivered in spades.Great company well worth the effort to contact.
ArBa InstallationsArBa Installations
22:23 20 Dec 22
Posting from the view of an Installations company, C & A have always been a pleasure to deal with. Their process is very thorough and products are top quality. We use them for all our commercial doors and would highly recommend all their products and them as a company.
Paul DillonPaul Dillon
14:17 23 Nov 22
Great service. Top products. Thank you. C&A
Alfie TonerAlfie Toner
13:43 21 Nov 22
Great company to deal withQuick quotesPleasant staffGreat productsGreat customer supportDefinitely recommend
22:50 12 Jun 22
Couldn’t recommend this amazing company enough from start to finish the professionalism have been second to none. The quality of the work undertaken shows how much C&A take pride in there work. Thank You again
Gary WoodhatchGary Woodhatch
11:11 11 Mar 22
Have been dealing with Andy and Kim in the main at C&A windows for a few months now and the service overall has been great, quick quotes, lead-times inline with expectations and well presented and packaged goods. Great responsive aftersales assistance when called upon. Would recommend C&A for sure.
richard newellrichard newell
07:44 11 Mar 22
Always a pleasure to work with the people at c and a, very good communication throughout the process and most importantly the product is excellent.Highly recommended.

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Send us an email if you have any questions.


call us

Need to know more about our products? Call us, and a member of our sales team will help you.

01787 477976

visit us

Book an appointment to visit our showroom.  
8am – 5pm Monday – Friday

Unit 1, Lancaster Way
Earls Colne Business Park, Earls Colne, Colchester CO6 2NS

We are looking for new staff to join our team.