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Peak offer a range of high performance commercial window systems that achieve U-values less than 2.2W/m2K to meet the very latest thermal insulation standards of the building regulations. Comprising of integral polyamide thermal breaks, the systems include fixed lights, top hung, tilt-turn, pivot (horizontal and vertical) and overswing windows. A full range of mullions and transoms aloows for large composite windows to be fabricated.


Windows are constructed using mitred and mechanically crimped corners, with support chevrons and cleats to provide for accurate alignment. Integral transoms and mullions are installed by scribing the ends and then either screw fixing or bracket fixing into the outer frames. A proprietary sealant to protect against water entry is used on all metal-to-metal joints at assembly.

Opening window frames are designed to be inserted directly into the outer frames using butt hinges or friction stays.


Products have been tested in accordance with BS6375 Part 1: 1989 (performance of windows and doors – classification for weathertightness and guidance on selection and specification). Test reports are available on request.


Double Glazing is standard and should be carried out to the recommendation of BS6262. A variety of glazing options are available to maximise thermal and acoustic performance. The various ranges of window sections can accomodate glazing thickness of between 6 and 48mm units. Each pane of glass is individually inserted into a fully rebated and prepared opening, with the glass retained by beads. Wedge gaskets are attached to the inside to give internal beading as standard, improving safety and security. External beading is also an option on casement and overswing configurations.


All Peak window systems are available in a full range of polyester powder or anodised finishes.

Stoved polyester powder coated in accordance with BS6496, available in a large range of single RAL colours, Self colour or Anolok anodised in accordance with BS EN 12373 and BS 3987


Peak’s range of window systems offer a number of reassuring security features including:

  • Opening lights, which are internally glazed
  • Fixed lights, which are internally glazed
  • Two-point or multi-point espangnolette locking supplied for the open out configurations
  • Four to eight point locking for the tilt/turn window system

Technical Support

Our design, installation and glazing service is available nationwide. Our technical support department can provide comprehensive technical advice and standard drawings as hard copy or disk.

Test reports are available on request.

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