Secondary Glazing

But what exactly is secondary glazing?

Secondary glazing involves installing an additional independent glazed unit on the inside of your existing windows. This creates an insulating air gap that dramatically improves performance. Available in a range of styles including horizontal sliders, vertical sliders, hinged units, lift-out units, and fixed panels, secondary glazing is fully bespoke and can be tailored to suit almost any window type, including sash, casement, and arched designs.

Unlike replacement windows, secondary glazing is a non-invasive solution that is particularly popular for period properties, listed buildings, and conservation areas where original windows must be retained.

Why upgrade to secondary glazing?

Older single-glazed (and even some double-glazed) windows are a major source of heat loss, noise pollution, and security weakness. Timber frames can warp and rot, while gaps around sashes allow draughts and external noise to enter your home. Secondary glazing addresses all these issues by adding a robust additional layer.

Granada secondary glazing significantly reduces noise by up to 80%, cuts heat loss by up to 65%, and provides an extra barrier against intruders. The slim, unobtrusive frames maintain the appearance of your original windows while delivering modern living standards.

The Granada Way

Granada secondary glazing is manufactured to order using state-of-the-art technology and over 35 years of expertise. Available in both Classic and Enhanced ranges, you can choose the level of performance that suits your needs. Enhanced units offer ultra-strong aluminium frames supporting thicker glass for superior acoustic and thermal results, all with sleek sightlines that blend seamlessly into your interior.

Product Benefits

• Superior Noise Reduction – Up to 80% reduction in external noise
• Excellent Thermal Insulation – Reduces heat loss by up to 65% for lower energy bills
• Enhanced Security – Additional barrier that is difficult to open from outside
• Low Maintenance – Durable aluminium construction that will not rot or warp
• Preserves Original Windows – Ideal for period and listed properties
• Bespoke Design – Made-to-measure for perfect fit and discreet appearance