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Slimline Aluminium Windows

slimline windows
Aluminium Windows
Slimline Windows
Aluminium Slimline Windows
Slimline Aluminium Windows
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Klosen – Slimline Windows

Elegant and luxurious slimline aluminium windows are engineered with purpose to create a stylish, modern and sophisticated entrance way to your home.

Klosen has been embracing technology, contemporary materials and innovation for more than 25 years as experts in the industry. It is our priority to provide the highest quality products that create beautiful living spaces, combining elegant design with specialist, secure fittings.

Our long-lasting relationships with our customers is true testament to our reputable work, trusted by customers across Peterborough. We provide our personal guarantee to the supply and installation of all our aluminium profiles.


Slimline aluminium windows utilise sleek frames that imitate the look and feel of original steel windows. They offer complete or partial glazing without the need to modify the nature of the property – our windows become a part of your home.

Sitting comfortably with the contemporary lifestyle, our slimline range brings uniqueness to your home. With minimal framing, watch as your sanctuary is transformed by inviting in more natural light and turning a good view into a fantastic one.

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Our slimline aluminium windows offer inherent durability. Their stunning thin frames are no compromise to the strength offered making them ideal for your home and other architectural projects.

By investing in slimline, you face minimal maintenance to prolong the lifespan of your windows. The minimal structure sits harmoniously within your home, creating a haven of spaciousness. They will revolutionise the way you see your property.

We collaborate with

If you are sure about opting for a slimline aluminium window in your home, we also offer slimline sliding doors. These are designed as part of the collection and will provide the finishing touch to your home. Both are designed to be effortless and we work with a variety of brands to bring you the best aluminium doors on the market.

Our Latest Projects

Our Customer Reviews


Great Price & Quick Delivery

This company have been amazing and came to our rescue when another company let us down repeatedly over a period of 4 months during our building work. We got a great price, a quick delivery time and the same product but this time with lovely fitters who knew exactly what they were doing. Now we will will have a warm house for christmas HOORAY !! We went for 3 large sliding doors and the quality of the product is excellent . Many thanks to Audrey Cieran and the team I would recommend highly
- Esther Young


Delighted with the product and the service provided by Klosen. The installation team were excellent and very helpful.
- Sara Hyem

Very Happy

We’ve been very happy with the work Klosen recently completed for us. They installed a variety of windows and sliding doors for us on our new build project. All of the information we requested early on was provided promptly and they were great with our architect. Very happy with the end result and the colour they helped us chose.
- Sarah Munton
Get in touch with us today to receive your free quotation!