Aluminium Doors & Windows

The Alitherm Series - Alitherm 600


The Alitherm series of windows offer a range of high quality glazing solutions for side hung, top hung open out, top swing reversible and parallel opening casements, suitable for both the residential and commercial markets.

  • Window Energy Rating A
  • BRE Green Guide A
  • U Values up to 1.2 W/m² and glass unit
  • Includes the Kitemarked systems Alitherm 600 & 800 with PAS 24: 2012 Security K depending on system


All general light use applications inc commercial.


  • An enhanced system designed to comply with the revisions to the Building Regulations
  • Document L compliant
  • System can achieve Window Energy 'B' Rating
  • Profiles feature an extended polyamide thermal break to enhance thermal performance
  • Fabrication is by method of crimped cut-alitherm600or mechanical corners
  • Ovolo, chamfered or square profiles
  • British Standard Kitemarked system
    KM 81580
    KM 81543

Technical Specifications


Finish Single or dual colour, marine quality polyester powder coat as standard
U Value 1.3W/m²K using correct sealed unit
Air Class 4, 600Pa
Water Class E 1200Pa
Wind Class AE, 2400Pa
Document L Compliant


Frame 59mm & 70mm
Glass 28mm to 38mm double or triple glazed units
SH Max o/a Width 1000mm
SH Max o/a Height 1400mm
TH Max o/a Width 1400mm
TH Max o/a Height 1500mm
(For sizes outside of these parameters, contact us).