Standard Secondary Glazing Systems


APG’s range of secondary glazing is supplied fully assembled and comprises an aluminium outer frame surround which can be fixed reveal or faced fixed this allows for a neat, unobtrusive installation even in the most difficult situations. A range of hardwood sub-frames and scribing trims can be used to assist face fixing, reveal fixing and the coupling of units. This allows the satisfactory refurbishment of our largest primary windows. Suitable for all types of premises including grade one and two listed buildings, schools, colleges, hospitals, universities, hotels and commercial buildings i.e. offices.

Horizontal Sliding System

The Horizontal Slider is undoubtedly the most frequently used type of secondary glazing. Its uses are therefore widespread, being applied to high rise or low-level commercial properties, historic buildings as well as all kinds of domestic dwellings. The secondary units HS system provides sensitive solutions to the problems created by noise and sound pollution with the added vantage of improvement of heat loss.

Generally available in two, three or four panelled versions, the sashes are fitted with brass rollers, ensuring the smoothest sliding action. Twin brush seals provide excellent high sealing efficiency. This has been scientifically proven to eliminate draughts, increase thermal insulation and give greater improvements to the security of the primary windows. The security issue is further enhanced with the use of the latest locks and handles.

Vertical Sliding Systems

Due to the characteristics of the existing primary window, the Balanced Vertical Slider is the most complex type of secondary glazing system. It is applied generally to older properties with box sash windows. It is particularly suited to the refurbishment and upgrade of the nation’s architectural heritage.

The individually pre-tensioned spiral spring balances control the motion of the sash, enabling infinite vertical positioning. This design provides ease of movement and has been specially developed to withstand decades of wear and tear. Tilt in versions can be pivoted through almost 180 degrees. This is especially useful for cleaning but just as importantly can be crucial when considering fire escape requirements. All variations of secondary glazing styles are completely compatible. Each type can be easily used with another no matter what the application may be we manufacture to bespoke designs to suit all applications.

Hinged Opening Systems

When it comes to providing an unobtrusive secondary glazing system, the hinged unit provides the most appropriate solution, since there are no transoms or mullions to spoil the view. The reduction in noise, and improvement in thermal insulation, greatly enhances both the living and working environments.

The hinged unit can be manufactured in two main types. The single hinged unit opens on a restricting friction stay. Where the application is on a larger scale, the friction stay is replaced with a butt hinge. We have developed and rigorously tested a variety of butt hinges for differing leaf weights. The double hinged unit has been primarily designed to fit in front of larger Windows or French Doors, utilising the same range of hinges.

Lift Out System

Economically, the Lift Out is the most cost effective type of secondary glazing available. Its most common application is where limited access to the primary window is required, for example a window which has been installed with the sole object of providing light to a room. As well as economical, the Lift Out is also the most basic form of secondary glazing. As its name implies, it simply lifts out of a secured channel. For practical purposes, it is advised that the sash size be considered since the weight of glass must be of manageable proportions. Each sash is manufactured with double brush pile seal, further increasing the thermal and sound insulation properties.

Fixed System

Fix unit is a simple and cost effective way to improve noise and heat reduction on a single or double fix light window where there are no opening casement sashes in the existing window manufactured the same has all the other systems to give the same thermal and sound insulation properties.

Come to our show room at the Glass works, Skeoge industrial estate Derry City Northern Ireland and have a look at these in person or contact us today on 02871 357 444.