Thermally Broken System

Our Radial TB51 window system is thermally broken and provides strength and high performance in a fixed, opening or top hung configuration. All our windows are made to your specification.


  • Manufactured from aluminium alloy 6063 extrusions with a minimum wall thickness of 2.5mm
  • Our Radial TB51 sections are thermally broken using 2 x 22mm wide polyamide strips
  • Circular and shaped window frames are internally beaded for security purposes
  • Sections are polyester finished to any standard RAL colour
  • Dual colour option available on request
  • Windows are double neoprene sealed
  • All fittings are silver finish as standard but colours are available if required (at an extra cost)
  • Standard fittings for opening windows include an adjustable friction hinge with a built in 15 degree restrictor stay and reverse catch
  • All double glazed units are drained to the outside


All joints are welded and dressed flush so that no joint lines can be seen.


We use extruded 6063 aluminium alloy sections heat treated to T4 temper, which comply with the BS1474 standard.

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