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SD Glazing secondary Bespoke Window Pannels involves the use of irregular angles and units with more than four sides. There are limitations but, it is possible to shape horizontal sliding units, vertical sliding units hinged casements, lift out units and fixed panes.


This allows sympathetic treatment of windows that are curved in the vertical plane and includes eybrow windows, full centre arch, semi-circular openings and bulls-eye windows.

















Vertical Sliding


Both the slim Series 20 and heavy duty Series 90 vertical sliding systems can have arched heads up to a full radius.

The frame construction and balance lengths will limit the travel of both sliding sashes and consideration must be given to access for cleaning and external window operation.

The minimum radius for Series 20 is 450mm and for Series 90, 500mm.



Hinged Casements


Heads can be curved up to a full radius with a minimum of 450mm.

Three sided curved casements allow the wings of semi-circular openings to be treated.

The espagnolette locking system cannot be fitted on the curve and face mounted catches/locks are fitted to three-sided units.

When a full radius casement is fitted within a barrel vaulted reveal the window height has to be reduced to avoid the shoulder of the opening vent binding on the reveal. An enlarged shaped timber sub frame is normally required.Fixed & Lift Out units

Heads can be curved to a full radius with a minimum of 450mm

Three sided curved panels can be produced to treat the wings of semi-circular openings

Fully circular units are available with a minimum radius of 500mm for series 40 and 450mm for series 45.

Locks and restrictor stays are fitted to Lift out units. Care must be exercised when the units are removed for cleaning.



Curving on plan


This allows treatment of windows that curve inwards


Hinged, Fixed and Lift out


Can be curved on plan to meet most radius requirements.

Curved glass is toughened or laminated

The joint between the vertical and horizontal curved plane will show a slight overlap.

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Bespoke Secondary Windows

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SD Glaziers in Kensington, all types of glazing and doors in Chelsea, all types of glazing and doors Notting Hill, all types of glazing and doors in Holland Park,all types of glazing and doors in Brompton,all types of glazing and doors in Knightsbridge, all types of glazing and doors in Earls Court, all types of glazing and doors in Hammersmith,all types of glazing and doors in Shepherds Bush all types of glazing and doors in Knightsnridge. We also install all types of glazing and doors in Wanstead, Woodford, Redbridge, Ilford, Essex, London, South London, South Kensington, North London, East London & West London and througout the whole of the London City

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