Aluminium Windows

Aluminium windows offer a mix of modern contemporary style as well as safety and security. Natural Angle offers a wide range of aluminium windows to suit all budgets and styles.


  • In General
  • Fittings
  • Interior Colours
  • Exterior Colours
  • Glass
  • Handles
  • Shutters
  • Roller Shutters
  • Accessories
Modern, designed to perfection, easy to maintain and indestructible. These are the attributes that probably best describe our aluminium windows. Three different versions and the narrow visual widths make aluminium windows very versatile in their deployment.



Actual colours may vary from the colour on your screen due to monitor colour restrictions.



Actual colours may vary from the colour on your screen due to monitor colour restrictions.

Heat Insulating Glass

  • Retains heat in the house
  • Protects the environment and saves cost through lower thermal loss
  • Thermal transmittance of 1.1 to 0.5 W/m2K
  • Lower heating costs
  • Optimal room temperature
  • Reduced CO² emissions


Safety Glass

  • Increased stress resistance
  • Reduced risk of injury
  • Recommended for family homes
  • Higher level of security


Sun Protection Glass

  • Reduced energy costs for heating and cooling
  • Solar heat gain in winter
  • Reduced reliance on air conditioning
  • Reduced condensation in humid rooms
  • Reduced carbon footprint


Sound Insulation Glass

  • Reduced noise incursion from outside
  • Enjoy your own life without upsetting your neighbours
  • Reduce your heating costs and prevent energy losses.
  • Good heat insulation can largely prevent condensation forming on the glazing


Self-Cleaning Glass

  • Cleaning is simplified by sunlight and rain - especially at hard-to-reach places
  • Less cleaning - more leisure time
  • Clear view even when it is raining
  • Fewer cleaning agents - greater environmental protection
  • Self-cleaning insulation glass can be combined with additional glass functions: heat, noise and burglary protection


Ornamental Glass

  • Large selection of structures and colours for customised design options and preferred styles
  • Contribute to environmental protection through the use of materials that can be recycled.



Choose from different models – for increased safety and security also available as a push-button handle or lockable.


Choose your window handles from the following colour options:


Secustik® – get a handle on safety and security with an audible plus

A patented locking mechanism in the Secustik® handle prevents manipulation of the window handle.


On request Natural Angle can supply you with additional window handles from reputable manufacturers.


Folding, sliding and sliding bi-fold shutters made of aluminium or wood are conducive to being harmoniously integrated into the window in any building situation. In the process, it does not matter whether it is a building style that is characteristic of the country, whether heritage-listed building regulations must be taken into account or whether a new building is being planned. Shutters will always have interesting options to offer any window type.

You can choose from three different models:

1. Fixed: The blades are fixed in the frame and cannot be moved.

2. Movable: The blades are movable, facilitating customised light regulation.

3. Closed: This model has a flush effect appearance.




Aside from the window itself, the roller shutter casing is often one of the main causes of heat loss in the building shell. Kneer-Südfenster roller shutters are installed simultaneously with the new window and consequently form an energy saving unit. For greater living comfort, to save energy and to mitigate the environmental burden.

The roller shutter product range from Kneer-Südfenster meets the needs of our time. Modern roller shutters can be integrated with the window as a design element in any facade in line with the customer’s wishes or virtually out of sight. With different profiles and a large selection of colours customers are spoilt for choice with almost no limits.



The external Venetian blind is the architectural alternative to roller shutters for modern houses with plenty of glass. The sun shield mounted on the outside prevents the excessive heating up of the rooms. It reflects the sun's rays and by turning the blades, as much light as you wish enters the room. This contributes towards a pleasant lighting scenario and keeps the heat outside.

External Venetian blinds come in a wide variety to suit your home.

INSECT PROTECTION: Rid your home of mosquitoes and flies

You have three different options to choose from:

Insect-protection roller blind:
The roller blind is integrated in the roller shutter casing and only makes its appearance if you want it to. It simply disappears in the roller shutter casing and in this way is protected from inadvertent mechanical strain.

Insect-protection hinged frame:
The rotating frame is mounted on the outside of the window frame and can be deployed flexibly, however it is most suitable for balcony and patio doors.

Insect-protection tenter frame:
The tenter frame is mounted without drilling and its deployment can be customised through diverse variation options. It can be hooked in and unhinged effortlessly from the interior. Our Kneer-Südfenster representative will assist you in making the right choice.

SASH BARS: For windows with style-appropriate features

As embellishments to the window they define the effect of the facade in a decisive manner and hence the look of the whole house. Sash bars on a window or balcony door are indispensable components of style-appropriate features and renovations of heritage-listed buildings. They afford your home a comfortable ambience and add stylishness to living.

From our extensive product range you can choose: Sash bars in the clearance between the panes, affixed sash bars, glass-dividing sash bars, as well as sash bars that are fronted (only possible in the case of wooden windows).