Bespoke Secure Windows

KSDW have created a range of secure timber sash and casement windows, which are manufactured in the UK. Although they look identical to ordinary sash and casement windows, they are far stronger and will resist attack for much longer than standard timber sash and casement windows.

Security / Anti-bandit

Torterolo and Re products

  • Class 3 ENV 1627


Depending on the kit specified

  • As low as 1.0 W/m² K.

English Heritage compliant

For listed buildings and houses in conservation areas


We offer a range of secure windows to LPS 1175 SR2 – as well as a tested and accredited security rating, products within this range are also aesthetically attractive (suitable for Heritage and Listed properties) with, importantly, a high level of thermal insulation.

The portfolio includes bespoke secure sash windows and also casements (including French / glazed doors

Manufactured on dedicated, state-of-the-art machinery, key features include the following:


  • Of engineered / solid Sapele Mahogany or Accoya with:
    • Acoustic insulation up to Rw 40dB
    • Patented operating system for sash windows to provide draught sealing and ensure true and reliable operation combined with traditional lead counterweights and pulley system
    • Weather proofing to BS6375-1
  • Glazing bars…. with options of:
    • Surface mounting on single panes, or
    • Solid glazing bars to accommodate individual glass panes

Security Glass

  • To LPS 1270.1.1.2……. with options of:
  • Single glazing (20mm) or
    • Double glazing (20mm external;14mm argon filled cavity; 4mm low e toughened internally)
    • Enhanced security to BR2, if required


  • Range of circa 40 finishes, all applied in dedicated state-of-the-art paint shop and factory finished
  • High grade hardware with 7 different options

Choose from our range: