A system capable of adapting to the aesthetic and functional needs of any building is essential in architecture. KT51 Tilt & Turn offers a huge range of adaptable options for any room, thanks to the combination of its opening possibilities. Furthermore, its technical features are excellent, making this system one of the most complete in our range.

  • Top and side hung applications, as well as Tilt & Turn
  • 32 mm polyamide
  • 28 mm glass, as standard
  • Joined using mechanical corner cleats
  • Egress options available
  • Cills, add ons, curtain walling insert and coupler sections available
  • Available as wide opening ‘escape’ windows
  • Innovative double opening action
  • Robust and secure design
  • Contemporary semi-radius sash frame
  • Integral drainage system
  • BS7950 Security
  • PAS24 Security accreditation
Technical information
Air permeability* Class 4
Water tightness* Class 8A
Wind load* Class C5
Thermal insulation Uw** Up to 1,4 W/m2K


* Air/Water/Wind tests according to standard BS6375-2

** Please note: U-Values are dependant on size and glass U-Values.

Maximun leaf size: 1500x2100 mm

Maximum weight: 90 kg

Maximun glazing: 32,8 mm

Polyamide: 24/32 mm

PAS24 Security 

BS7950 Security 



The KT51 modern design allows tilt & turn openings, together with a modern semi-radius sash frame making this system perfect for residential or commercial applications. It also has a floating mullion section to facilitate a French window design.


Security and strength are crucial in this system. It was tested accordance PAS 24:2012 and BS6375-2-2009, giving confidence when dealing with education and commercial sites where durability is a key consideration.


KT51 system offers high thermal efficiency giving a Uw value of 1,4 W/m2K. KT51 system has been tested in accordance with BS6375-1 2009 for Air, Water and Wind resistance making KT51 an ideal choice for exposed or remote sites.


A 75 mm coupling/sub-frame section allows the system to suite in with the 75 mm window suite and KC51 sub frame system and door. Another important option that KT51 has is a reverse rebate adaptor for use on the fixed lights allows external beading to sail past internal walls or floor slabs.

Technical manual

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