Our hinged secondary glazing can either be butt hinged, friction hinged or parallel friction hinged, each has it’s own advantages and disadvantages. Generally hinged secondary glazing lends itself to use in hard to treat areas such as bay windows and other specialist applications. It is ideal for large glass areas where quick and easy regular access is required. i.e. for maintenance, ventilation or cleaning.
Butt hinged units open to around 150° giving a large clear opening for full access to the existing windows. Friction hinged units open to around 65° providing a large opening. The friction hinges allow the panel to be held in any given position, regulating ventilation. Parallel hinged or PIP™ secondary provides a restricted opening for controlled, secure ventilation. Hinged units can also be combined with Lift Out units, making them perfect for specialist applications.
Home > Products > Secondary Glazing > Hinged Units > Technical
The sizes detailed below are for guidance only, if the sizes you require are less than the minimum or exceed our maximum recommended sizes - please ask our technical department for advice.
Butt Hinged UnitsSingle Butt Hinge | |
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Min. Width (mm) | 300 |
Max. Width (mm) | 900 |
Min. Height (mm) | 400 |
Max. Height (mm) | 2100 |
Double Butt Hinge | |
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Min. Width (mm) | 700 |
Max. Width (mm) | 1800 |
Min. Height (mm) | 400 |
Max. Height (mm) | 2100 |
Please Note: that all sizes provided are recommended sizes only and special request to go under or over these sizes may be possible. However the product may not carry a Duration Guarantee.
Top Hung | |
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Min. Width (mm) | 300 |
Max. Width (mm) | 1250 |
Min. Height (mm) | 400 |
Max. Height (mm) | 1250 |
Side Hung | |
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Min. Width (mm) | 300 |
Max. Width (mm) | 1250 |
Min. Height (mm) | 400 |
Max. Height (mm) | 1250 |
Please Note: that all sizes provided are recommended sizes only and special request to go under or over these sizes may be possible. However the product may not carry a Duration Guarantee.
Top Hung | |
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Min. Width (mm) | 350 |
Max. Width (mm) | 1250 |
Min. Height (mm) | 400 |
Max. Height (mm) | 1000 |
Side Hung | |
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Min. Width (mm) | 300 |
Max. Width (mm) | 650 |
Min. Height (mm) | 400 |
Max. Height (mm) | 1250 |
Please Note: that all sizes provided are recommended sizes only and special request to go under or over these sizes may be possible. However the product may not carry a Duration Guarantee.
Economy Odd leg | |
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Outerframe Depth (mm) | 25.5 |
Sash Depth (mm) | 19.5 |
Glass (mm) | 4 - 6.8 |
Max. distance to visible glass (mm) | 77 |
Vertical Interlock (mm)² | 77 |
Side Hung | |
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Outerframe Depth (mm)¹ | 37 |
Sash Depth (mm) | 19.5 |
Glass (mm) | 4 - 6.8 |
Max. distance to visible glass (mm) | 70 |
Vertical Interlock (mm)² | 77 |
² Vertical interlock applies to double Butt Hinged units only.
¹ We offer three different sizes of subframe's for our Luxury Subframe system; giving a depth of SF1: 39mm, SF3: 55mm, SF4: 69mm.
Specifying - Suitable Applications | |
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Technical Drawings - Downloads |
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Technical drawings can be provided in DWG or DXF format, please contact us. |
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