Aluminium Secondary Glazing Combination Units

As one of Europe's largest suppliers of secondary glazing we also offer combination secondary glazing units. We can combine Lift Out and Hinged units in a variety of different configurations, which are divided by a dedicated transom / mullion. These combined secondary glazing units can therefore be made up within one outerframe.

These units are designed to saving fitting time and giving slimmer sight-lines, making it quick and easy to align the secondary glazing with the prime window.

Technical Specifications

Specifying - Suitable Applications
  • Combination secondary glazing is most suited for copying an existing combination window. For example; a bay window consisting of three top hung over fixed lite windows.
  • Can be specified for commercial or domestic applications. (Luxury Subframe being most suited to residential applications due to its aesthetic appeal.)
  • Busy areas where traffic noise is a nuisance - even where double glazing is already fitted.
  • Ideal for use in Listed Buildings, heritage / conservation areas and period properties.
  • As a cost effective alternative to replacing your existing single glazed windows.
  • Leasehold properties, where changing the existing windows may be uneconomical.
  • Any property where you are unable to modify the existing external windows.
  • Any window that needs insulation, noise reduction and / or draught reduction.

Please note: Glass specified must comply to the glass safety BS 6262: Part 4, 1994 regulations. (see document downloads)

Document Downloads
Secondary Specifications
(20 page specification guide, detailing all available secondary glazing.)

(3.6! Mb)
Fitting & Measuring Guide
(8 page installation and measuring guide for our secondary glazing.)

(0.4 Mb)
Document Downloads
Glass Safety Guidelines
(Guide to where you must comply with glass safety regulations.)

(0.1 Mb)
Combination Units
(Combination transom / mullion details, recommended sizes and sight-lines.)
pdf order checklist
(0.4 Mb)
Technical Drawings - Downloads

Technical drawings can be provided in DWG or DXF format, please contact us.

Please remember all sizes are for guidance only and are subject to location of the fitted product. Please contact us for more information.

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Contact Information

  • T: 01268 681612 (Office)
  • T: 01268 695100 (Showrooms)

  • F: 01268 510058 (office)
  • E: sales@duration.co.uk
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