With their narrow aluminium frames, slimline aluminium doors and windows are an attractive choice for commercial and residential properties. Bringing excellent thermal and noise insulation levels, you can have a home environment that feels comfortable all year round.
We offer a large range of slimline sliding doors, bifold doors and narrow frame windows that are luxurious in design and elegant in function. Enhance the ground floor of your property with natural light and uninterrupted access to your outdoor spaces.
Klosen are leading slimline aluminium doors and windows installers. We work on commercial and residential installations, and our past work includes a Grand Designs project and the purpose-built ABBA arena.
Customise your designs with a range of opening mechanisms and frame finishes to choose from. Download a brochure to browse your options in more detail.
Get a free quote with us today to get your project started.
Aluminium bifold doors are installed as a row of floor-to-ceiling doors with large glass panels set in slim frames. These folding glass doors can be pushed to one side to extend your living areas and create a seamless entranceway between your interior and exterior spaces. Discrete bi-folding offers a 95% opening aspect, increasing natural light exposure.
Slimline sliding doors blend functionality with aesthetics by optimising your entranceways’ panoramic views. Their streamlined design opens up your interior spaces, with minimal frames. Their design ensures seamless opening and closing, while the durable double or triple glazing and strong aluminium profiles ensures maximum security.
Slimline aluminium windows offer maximum light and offer a contemporary design that will fit with any home. Not only are the slimline windows stunning in design, but they offer maximum durability and strength.
From casement to traditional sash designs, our windows bring timeless appeal to your property, perfectly matching function and appearance.
We offer a 10 year guarantee on all aluminium profiles and 25 years for the powder coating element
Stay warm in the winter and cool in the summer whilst cutting down on energy bills
Our team are flexible throughout the entire process, including the design and installation of windows
Klosen have over 25 years experience working with designers, architects and homeowners
Klosen has been a trusted name in the industry for over 25 years, providing customers with exceptional bespoke slimline aluminium windows and doors. We specialise in luxury brand doors and windows, combining flair, style and innovation to create contemporary, secure living spaces.
We work across a 60-mile radius from our premises in Lincolnshire. Popular areas we cover include Peterborough, Cambridge, Lincoln and London. From Stamford to Covent Garden, we’re proud to supply luxury doors and windows that enhance properties in urban and rural locations.
Not sure if we operate in your area? Contact our team today.
Aluminium windows tend to be slimmer and stronger than uPVC. You can have a larger glass surface area due to the strength and support of the frames.
Aluminium windows and doors typically have a life expectancy of 45 years. This is much longer than uPVC frames which have a life expectancy of only 25-35 years. With Klosen you also receive a 10-year guarantee with your windows and doors.