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The Winston Heritage Sliding Sash Window Range – the design and specification for this product was born out of a large Grade II listed project that we completed in Winston Churchill’s wartime residence on the edge of Richmond Park.

The Winston – a perfect heritage window for renovation projects and Listed Buildings

10 year no maintenance paint warranty badge 5-8 year no maintenance stain warranty heritage window 10 year warranty on workmanship and materials badge Class 4 Air Permeability test badge class 4 weatherproofing test badge Part L Compliant High Energy Efficiency Badge

This product was designed to incorporate a number of highly traditional features to give a very traditional aesthetic, but by utilising modern design and materials, we have also been able to deliver exceptional performance. This product comes with our full 10-year guarantee on all elements and delivers energy efficiency ratings as good as our modern double glazed products.
Winston heritage window by timber window manufacturer Gowercroft installed in a country home with lovely views


  • Manufactured from Accoya, the best longevity of any timber together with exceptional energy efficiency. Pilkington Spacia vacuum cavity glazing, delivering U-values comparable with modern double glazing, but with a total thickness of only 6.4mm. No double refection makes it perfect for use in conservation areas.
  • Fully concealed gaskets.
  • Traditional fitch fasteners, pulleys and sash limiters in a range of styles and finishes. Hung on traditional lead weights as standard.
  • Slender 18mm glazing bars and thin profle of the windows reduce the perceived width of the sections. External bar designed to replicate the traditional appearance of putty pointing.
  • Glazed and spray finished exactly as our other products, with all the benefits of performance and longevity. This product comes with our full 10-year guarantee and is eligible for TimbaCare.

A modern, efficient window that is a real alternative to slim double glazing:

  • Extended comprehensive guarantees
  • Energy efficiency that meets modern regulations
  • Traditional appearance for conservation projects
  • More cost effective initially and in ongoing maintenance

Enquire about this product

Other Heritage Window products – The Richmond Casement Window
Read more about Pilkington Spacia Glazing.