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Shop for Cortizo 4900

The Cortizo 4900 offers excellent thermal and acoustic insulation, supported by a glazing capacity of up to 36 mm and a 34 mm thermal break. It features a 35 mm interlock, allowing sash crossing thanks to the integrated handle with multipoint locking system.

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Horizon Windows and Doors Limited
5.0
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Michael F.
19:30 19 May 26
Ordered bi-folds as well as a number of windows as part of a house extension and was extremely pleased with the results. Great quality and had lots of options to customise as part of the purchase process. The website was intuitive and after comparing prices at a few different places, I can confirm they were very reasonably priced. Would certainly use again.
Olly H.
16:23 09 May 26
Jeally pleased with our windows. Josh and Ryan helped me choose exactly what we needed. Even down to the u values of the glass. Thanks again guys!
Julian H.
21:41 30 Apr 26
we ordered byfold doors and windows great quality and service
Victoria W.
17:48 28 Apr 26
From start to finish Josh and the team were so very helpful guiding me through the online ordering process, answering questions that I thought were stupid! It felt like dealing with a showroom not a website. They kept in touch with delivery dates and followed up a week later. Great service (very rare these days) I wouldn't hesitate to recommend. My doors went in today and the builders said they were easy to install and good quality. I am delighted with them. They look incredible. I will post pictures when they are complete. Amazing value for a bespoke door. 5 stars all round
John N.
20:53 14 Mar 26
Great job and friendly customer service - excellent job!
Ayman
11:55 11 Mar 26
Great service, bought windows and doors for our garden room. Amazing quality 👍 thanks so much!
Steven W.
23:04 02 Mar 26
Great company, we used this company to provide us windows for our extension, easy company to deal with will use again
Dmytro T.
11:57 28 Feb 26
Very happy with our windows
P Y
12:26 27 Feb 26
Great products and great customer service and support. 👍
Dl D.
22:38 26 Feb 26
Amazing service, speedy delivery and super helpful. Great company to do business with.
Hana-Louise B.
21:01 26 Feb 26
Such a seamless process with this company, there communication has been amazing! Have received my windows and my bifold doors of which the quality has been outstanding. Will most definitely use them again and highly recommended.
Hazel B.
20:14 25 Feb 26
Excellent bi-fold doors. Very smart-looking and no problems with them 2 years on. Would recommend 👍🏼
Aaron C.
19:38 25 Feb 26
We bought some sliding doors for my garden room. Very pleased with the price and service. Will definitely use these guys again!
jason K.
19:04 25 Feb 26
From beginning to end of the process josh and his team have been amazing. Their knowledge and service is excellent. The quality of the product is fabulous. Highly recommend. A family friendly business with high standards. Many thanks
Mark T.
18:56 25 Feb 26
We got ourselves some new windows from Horizon. Couldn’t be happier with them, and the speed with which they were made and installed. Tidy workplace too, so didn’t have to worry about standing on anything!
Jordan H.
10:15 25 Feb 26
Couldn’t be happier with the extension & kitchen fit. Professional and clear from the beginning whilst keeping me updated with the process. Happily recommend.
Erin
23:03 08 Feb 26
We had a set of bifolding doors installed by the team at Horizon Windows and Doors. The quality is excellent and Josh's advice has been invaluable - we are really happy with the end result. The team were friendly, professional and tidy and we would highly recommend them!
Emine H.
09:55 07 Feb 26
We recently had our windows replaced by Horizon Windows and Doors and the whole experience was excellent from start to finish. The team talked us through the options clearly without any pressure, which we really appreciated.
Installation was smooth and tidy — the fitters worked efficiently and left everything clean at the end of each day. The quality of the windows feel solid, and we’ve already noticed a difference in warmth and noise reduction at home.
Communication throughout the process was clear and responsive, and any small questions we had were dealt with quickly. Overall, we’re really happy with the results and would definitely recommend Horizon Windows and Doors to anyone looking for reliable service and high-quality products.

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Company No: 16754122 .

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