With the ability to enhance almost any type of building, whether modern, contemporary or traditional, Liniar bi-fold windows enable you to fully open one side of a room while retaining valuable wall space for furniture inside.

A practical and great looking window solution. Liniar bi- fold windows are popular for use in conservatories and orangeries and are also ideal for the commercial sector. During the summer months they can transform a café or restaurant helping to attract additional customers and give an establishment an outdoor, open feel, while also being secure and child-friendly.

  • Standard four chamber frames.
  • Sculptured (curved) styling.
  • 28mm double glazed units.
  • Add Georgian Bars and/or patterned glass.
  • Wide choice of coloured and foiled frames.
  • Wide choice of handles and hinge options.

So, what are the benefits?

  • 10-year mechanical warranty with “Sentinel” next generation locking
  • 10-year Profile warranty
  • Available from an entry level “C” Rated to an “A++” Energy rating
  • Achievable “U-values as low as 0.8”
  • Secured by Design upgrade available on request
  • 40mm glazing option
  • Range of hinges easy clean / fire escape / restrictorFull colour range
  • Minimum size square 350mm w x 350mm h
  • Maximum size side opening sash 700mm w x 1300mm h
  • Maximum size top opening sash 1300mm w x 1300mm h
  • Unique warranty registration available on request


Choose from a wide variety of colour options including: White, Rosewood, Cream, Light Oak, Chartwell Green, Grey and classic Ebony Black. Liniar products are also offered in a wide choice of bespoke colours, please see Renolit foil book, (subject to availability and price on application only).

Colours Available

Bespoke Colour options

Take a look at our Bi Fold Windows gallery