Insulating glass units or multiple glazed

Double glass unite (DGU)

Insulating glass units or multiple glazed or sealed units incorporate two or more panes, separated by spacer or spacers, to create a cavity between each successive pane          in the unit. The cavity is usually filled with dehumidified air. They can be constructed      from various combinations of glass and usually incorporate two panes and one       spacer.                                                                                                                                       Additional panes and air spaces can be incorporated.

Gas filling.

Dehydrated air is normally used to fill the cavity of the unit. Argon can be used to   enhance the thermal insulation properties. Heavy gases such as sulfur hex fluoride        can be used to improve acoustic insulation.

 Spacers.

The spacer is usually attached to the glass by sealant, with further additional sealant material to prevent air and water penetration. The spacer is normally a metal extrusion   but can be made from low thermal conductivity plastics. That spacer are often hollow    and incorporate a dehydrate or desiccant to ensure a low water vapor pressure in the   unit, reducing the likelihood of condensation forming in the unit under extreme  temperature condition.

Why DGU? More light, less noise.

The first function of insulating glazing is to reduce the thermal exchange between the     two environments which it separates, which brings many advantages

-         Reduction of installation cost for air conditioning and /or  heating

-          Lower energy consumption. 

-         Better comfort through reduction of disagreeable drafts  near the windows.

-         Perfect transparency by reducing the incidence of  condensation or even icing on the hot air side

-         Possibility of using bigger glazed areas for a given room  temperature without increasing the energy consumption.

Nowadays noise is a major source of pollution the growth of load and air traffic, the extension   of residential areas out to industrial sites are nothing new.

Sound levels of 60 to 80 db are generated in many different situations. We are surrounded by noise: at the workplace (factory or office) in the street, near traffic –intensive zones (railways,   air lanes, road traffic) at home (television, hi-fi units, neighbors, …etc.). Not infrequently,       noise is at the root of behavioral disorders, lack of concentration stress, irritability, fatigue,      and insomnia ……etc. Since it is often impossible to eliminate the external sources of noise themselves; something must be done to prevent noise from entering our homes.

Alico Egypt has found an effective, long-term solution to this problem by using their DGU. This is ideal as sound insulation for all types of home. Moreover, it is indispensable for homes situated in the immediate vicinity of factories, major traffic

Routes, stations and airports, in hospitals, schools, hotels, major department, stores, retirement homes, offices, laboratories, telephone boxes, theatres…etc.    

Alico Egypt has an optimal solution for any specific sound insulation problem.

On noise perception.

Sound intensity is measured in decibels (db). The sound insulation properties of glazing can be   expressed in several ways:

• The Rw index (db): calculated according to German standard din 52210 which corresponds to ISO 717 and this is the most commonly level noise used.

• The Ra (db (a)) index used mainly in France and this is based on the noise spectrum of road traffic.

Double glass unit. (DGU.)

·         Minimum DGU. To be done through our automatic machine (200 x 300) mm.

·         Maximum DGU. To be done through our automatic machine (2500 x 3500) mm.

·        Minimum glass thickness used in DGU. Is 3mm. The standard sealant for any DGU. Used in (window, doors & conventional curtain wall) is polysulfide. But if the DGU. Is used for structural glazing system or to be contacted with any silicon sealant, seal of DGU. Should be by silicon.

·        The standard coating surface in DGU. Is on face # 2 if coating is required on any other face it should be specified on the glass order. 

·        For low E coating it can be used in face # 2 or face # 3 depending on customer requirement.

·        For structural glazing stepped units the external panel should be all round polish.