Vertical Secondary Double Glazing

Vertical Secondary Windows are Ideal for Sash Windows, our vertical sliding (VS) panels are slimline and look great. Our ‘Tilt Back Balanced’ panels tilts in for access to your existing windows and to aid cleaning. We also offer a non-tilting version for situations where the tilt is not required - such as schools. Our most economical VS is the non-balanced, non-tilting panel. Our ‘Heavy Duty’ system can take a double glazed unit for maximum results.

From a slim system that can treat most traditional sash windows. Sashes are not removable but contra-slide to assist cleaning. To a titling system that allows the sashes to tilt into the room to facilitate cleaning. It is particularly suited to windows with offset meeting rails.

Or a heavy duty system designed to treat very large sash windows and, through use of thicker glass, provide higher levels of acoustic insulation or security with a high security system offering resistance against intruder attack or blast.

Cleaning should be set with a minimum gap of 75mm to allow access for cleaning. Some traditional box sash windows have no reveal and a new timber subframe projecting beyond the architrave has to be fitted.

Maximum opening. The frame and location of the spring balances will stop the sash between 100mm and 150mm from the centre line.

This may affect access to sash locks in the external window arched heads. The length of the balances is reduced to the strike point of the arch and this will limit the travel of the sash.

Most sash windows can also be treated with hinged casements and this is the preferred treatment for Sash & Casement windows in which the lower sash of the primary window, set in the partially raised position, has to hinge inwards for cleaning