To obtain a higher acoustic insulation, the double glaze window will be used, with different thicknesses (e.g.: 6mm with 4mm), which attenuates noise with a 30 ~ 40 % higher than the double glaze window made with the same thickness. The simplest insulating double glazing window package reduces by 50% the rate of heat transfer compared to traditional monolithic windows. By adding insulating window glass sheets with coloured overlays, reflective and Low E can significantly increase thermal performance of windows. Indicators to be considered in choosing insulating glass are:
- heat transfer coefficient U ( W/m2K ) – heat flow that crosses an area of a square, when the indoor and outdoor difference is of one degree (with an outdoor temperature of 0 º C, an interior temperature of 20 º C and a wind speed of 4.4 m / s).
- Light transmission coefficient T (%) – represents the percentage of visible light transmitted through the glass. The higher this coefficient is, the insulating double glaze window is more efficient, allowing large amounts of light to traverse, which reduces the costs for lighting.
- Luminous reflectance coefficient R (%) – represents the percentage of visible light reflected from the double glaze window. The higher this coefficient is, the perception of the eye beyond the glass is weaker. The glass with a high coefficient of reflection ensures the privacy and confidentiality of your home, thus avoiding the endowing with roller blinds. Advanced technologies have enabled the creation of double glaze windows, which have a good light transmission and reflection, as well as an acceptable solar factor. It is recommended that the PVC or aluminum with double glaze in homes / south orientated buildings to be fitted with low solar factor thus reducing the cost of cooling the room, and fading of objects in the room.
- The coefficient of sound insulation Rw (dB) – defines the PVC or aluminum carpentry capacity with double glaze window of noise attenuation. The higher this coefficient is, the higher the insulation capacity of the double glaze window is, which gives your home a low noise pollution and comfort.
The main types of glass used are:
- LowE glass – (low emissivity) presents a magnetron film which contains several layers of metal oxides, metal, silver or alloys that are almost invisible. This layer has the ability to substantially raise the insulating properties of the glass, because it reflects the majority of the heat radiation back into the room, reducing heat loss through the glass.
- Four Season Glass – (four the seasons glass) because it incorporates the qualities of a Low E glass and of a reflexive glass: in the winter, it has a thermal insulation coefficient of 1.1 w / mpK, and in the summer, unlike Low E, it has a solar factor between that of a reflective glass and of a tinted glass . In other words, the advantage of this compared to LowE glass is that in the summer it provides a high solar protection than standard Low E glass. Another advantage towards standard reflective glass is that it has a higher light transmittance.
- The burglary resistant glazing duplex is a glass obtained by combining the two sheets of glass with a layer of special resin. The most commonly used glass is of 6 mm, made of two glasses of 3 mm and a sheet of 0.38mm. If this type of glass is broken, the pieces remain together, which reduces the risk of injury. This type of duplex glass is recommended for non-residential buildings, where the glass surface is large, giving them an improved thermal and acoustic insulation.
- The reflective glass ensures the privacy of your home, not allowing viewing from the outside to inside during the day. Reflective glass is obtained by applying a metal oxide film on a clear or tinted glass. This type of glass is characterized by a high solar reflectance and a transmittance factor through a low light.
- Safety glass has a resistance of 3-4 times higher at mechanical and thermal stress than the untreated glass. In case of burglary, it breaks into very small pieces annihilating thus the risk of injury. Tinted glass, due to its filtering properties, by colour and thickness, reduces the eyestrain to strong sunlight.
- Reflective glass is made from transparent or tinted glass, and on surface, a transparent metallic layer is applied.
- The bulletproof glass glass is obtained by joining two or more float sheet glass (transparent, tinted or reflective) with one or more PVB layers. The final thickness depends upon the different types of weapon that must resist to it.
- The fire resistant glass is obtained by joining multiple sheets of glass between which there is a special transparent coating that prevents the propagation of heat by radiation and ensures the integrity of the glass.
- The decorative glass glass is a transparent or coloured glass obtained by passing it to the furnace through two profiled rolls. By incorporating a wire mesh at this stage, decorative armored glass is obtained. To enhance the aesthetic effects, ornamental glass can be sandblasted.
Solar climate – guard glass / 4 season, has the following advantages:
- reduces greenhouse gases, especially in the summer;
- reduces energy costs of air conditioning needed ;
- allows natural light to enter the room ( important advantage over reflective glass ).
We are sorry for the less professional quality of the posted pictures. The majority of the pictures were taken by the assembly team on building site conditions with available devices or mobile phones, thus having an informative character.