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Traditional Balanced Vertical Sliders Secondary Glazing

Traditional Balanced Vertical Sliders Secondary Glazing

Vertical sliding secondary glazing designed especially for secondary glazing sash windows. These discreet units house self-supporting panes that remain in place at any chosen position.


Download our Measuring Guide(s)

Download our Measuring Guide Vertical Slider
Download our Measuring Guide Balanced Vertical Slider / Tilting slider
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The Product...


  • Slim, unobtrusive aluminium profile
  • Smooth sliding action utilising spring balances to ensure ease of use and to support the weight of panel
  • Improved noise and thermal installation
  • Enhanced security
  • Suitable for arched applications
  • Suitable to have bevelled timber subframe to fix into bays /splayed reveals
  • Can be coupled or stacked with other units in the range to treat large areas of glazing or long runs of windows

Variations of Basic Unit

  • Tilt In Version of the unit available
  • Goal Post subframe and aluminium available
  • Locking Fitch Catch available
  • Standard and acoustic trickle vents are available
  • Can be coupled and stacked using a heavy duty frame coupling section or timber to timber
  • Larger trims and timber trims available at additional costs
  • Variety of stock colours available, including all RAL options
  • Can accept flyscreen mesh
  • Curved in plan option available

Please Note:

Balanced units work on a spiral balance, this mechanism takes the weight of the "sash" making it very light to open and meaning that the "sash" will remain in any open position that you place it. On the non balanced version you take the weight of the "sash" and you engage a series of clips so that the "sash" can remain open, non balanced are fine for windows that you rarely open or are small in size, otherewise we recommend balanced units. Due to restrictions as a result of the spiral balance BVS units will not give you a full 50% clear opening where as VS units will give a full 50% clear opening.

If you require assistance call 01325 310520 or email info@secondaryglazing.com. Please Note: Quotations are only available via e-mail, however you can have as much technical advice via telephone from our technical department, who are always happy to help.

Traditional Balanced Vertical Sliders Secondary Glazing

Part One

Part Two

Part Three


The Technical Information...


  • Glazing options: 4mm - 6.8mm
  • Choice of timber subframes
  • Pre-drilled and countersunk to suit either face fix or reveal fix
  • Woolpile inserted in to panel section groove to create outer frame seal
  • Gasket colour option of black or white
  • PVCu trims supplied for the face of the units to create a neat, clean finish
  • Standard colour white high gloss - RAL 9910
  • Fitch catch located centrally on mid rail

Optimum Noise Reduction: 53dB (Rw) Using 6.4mm acoustic laminate glazing, with 200mm glass-to-glass

Optimum U Value: 1.868 W/m2K Using 4mm toughened Low E glazing, with 80mm glass-to-glass

Traditional BVS
Configuration Based on 4mm Glass Vertical Slider HBVS
Max width: 1,500mm
or Max height 3,000mm

Download the technical drawings for Traditional Balanced Vertical Sliders Secondary Glazing

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