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What is secondary glazing and what are the benefits?

Secondary Glazing is when another layer of glass is installed on the inside, room-side of an existing glazed window

What are the benefits of secondary glazing?

  • Cost effective 
  • Retains the exterior character of your existing windows 
  • Reduces noise pollution
  • Retains heat inside your property (save up to 10% on your energy bills)
  • Ideally suited for properties where replacing the existing windows is not possible or cost-effective; for example, listed properties, period properties, and houses in conservation areas. 
  • Provides additional security
  • Quick and easy installation

Here at Prior Aluminium, we provide both horizontal and vertical sliding secondary glazing, ideal for box sash windows or casement windows. We also provide hinged secondary windows which lends itself to hard to treat areas such as bay windows and for large glass areas. Another option for hard to treat areas would be lift out secondary glazing. Lift out secondary glazing is named as such because the large panels can be lifted out of the frame for easy cleaning or to provide ventilation. 

The cheapest and easiest to fit option is fixed secondary glazing. They have no opening mechanism, no subframe and are simply fixed directly onto the existing windows. This style of secondary glazing will provide no access to the prime window but this option is easy to fit and therefore easy to reverse. 

Secondary glazing window

Secondary glazing window

What are the benefits of buying your secondary glazing from Prior Aluminium?

  • Available in white, silver, brown or any RAL colour
  • Float, obscure, toughened, laminated, ‘K’ and acoustic glass options
  • Made to measure
  • Face fix (odd leg or subframe) or reveal fix (extended subframe) options
  • Supplied with trims to cover fixing screws
  • Can incorporate fly screens if required


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