Round Aluminium Windows

Round Opening Windows Closed
Sobinco Restrictor
Circular fixed window


All our round windows are made to customer specification. The following size guidelines are for our thermally broken windows. For size guidelines on our non-thermal windows, please contact us.

Window Type Min Diameter Max Diameter (recommended)
Fixed 480mm 2000mm
Opening 600mm 1500mm


Our round aluminium windows are formed from our own Radial TB51 thermally broken system. If you are looking for internal windows that do not necessarily need to be thermally broken, our Radial 1000 non-thermal system can be used. This system also has the option of being single or double glazed. Our round aluminium window frames are TIG welded and dressed flush so that no joint lines can be seen.


All fittings are silver finish as standard but other colours are available if required. All our round aluminium windows are internally beaded for security purposes unless otherwise requested.

Opening Windows

Standard fittings for the round opening windows include an adjustable friction hinge with a built in 15 degree restrictor stay and reverse position catch. The reverse position catch allows our round windows to be turned 180 degrees, which enables both sides to  be easily cleaned from the inside of the building.

Powder Coating

Single Colour

Our frames are finished with a polyester powder coat using a wide variety of RAL, British Standard or Syntha Pulvin colours.

Dual Colour

We also offer a dual colour option, which allows the outside of the frame to be a different colour to the inside. See the Finishes page for more details.