Manufacturers & Installers of Secondary Glazing

Counter Balanced Vertical Slider Secondary Glazing

Smooth, Effortless Secondary Glazing

The most popular option to insulate existing PVC, timber, aluminium and traditional vertically sliding windows. Also used for single, top-hung, stacked windows and hatchways.

Sliders are operated via the full-length handles located on the bottom of each panel. The panel can be slid to any position as required and is held in position by the spring balances on the side of the outer frame.

Enhance the performance of your traditional sash windows with our premium balanced vertical slider secondary glazing. Designed for smooth, fingertip-light operation, these units are ideal for homeowners looking to improve energy efficiency, reduce noise and maintain the classic look of vertically sliding windows.

What Are Balanced Vertical Slider Secondary Glazed Units?

Balanced vertical sliders use counterbalanced mechanisms to ensure both sashes move effortlessly, ideal for windows that need regular opening for ventilation. Our systems are built to complement existing timber or uPVC sash windows without altering the original character of your property. These units offer:

  • Outstanding thermal insulation to reduce heat loss and lower energy bills.
  • Superior noise reduction, perfect for homes near busy roads, airports or urban areas.
  • Smooth sliding action, thanks to high-quality spring balances.
  • Easy cleaning access, with options for tilt-in sashes.
  • Discrete, unobtrusive frames that blend seamlessly with your existing windows.

Why Choose Secondary Glazing Master?

With over 35 years of expertise and a fully equipped manufacturing facility in Aldershot, we ensure every balanced vertical slider is built with precision and long-lasting performance in mind.
When you choose us, you benefit from:

  • A free, no-obligation survey carried out by experienced professionals.
  • Tailor-made units are measured, designed and manufactured in the UK.
  • Expert installation with minimal mess and disruption.
  • Honest advice on the best secondary glazing system for your sash or period windows.
  • Reliable aftercare and dependable product performance.

Ideal for Listed Buildings & Conservation Areas

Balanced vertical slider secondary glazing is often suitable for properties where double glazing isn’t permitted. It provides an energy-saving, noise-reducing barrier that preserves the charm and authenticity of your original windows, while significantly improving comfort.

Book Your Free Survey

Transform the performance of your sash windows with our custom-built balanced vertical sliders. Our friendly team will visit your property, assess your window setup and provide straightforward recommendations, with no pressure and no obligation.

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Free Survey & Quote – Professional Assessment Without Obligation

Our experts will visit your property to assess your specific requirements and provide detailed recommendations at no cost or obligation. This isn’t a sales visit – it’s a professional consultation where we listen to your concerns, evaluate your windows, and provide honest advice about the best solutions for your situation.