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| DICTIONARY
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CAD
CAD stands for Computer Aided Design. A CAD software is used in house construction for the preparation of drawings and plans.
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Cavity filling
Cavity fillings are insulating materials that are used to fill the joint gap for thermal and sound insulation, but not to seal moisture. Usually a 1-K-PU (one-component PU foam) is used for the filling of cavities. However it is also possible to fill cavities with cotton fibre, when allergic reactions to polyurethane foam is a concern.
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Clear glass
Due to its low amount of iron oxide Optiwhite clear glass is an extremely clear mirror glass and is produced by the float process. The green tint that is common for conventional glass is almost removed due to the removel of iron oxide. The clear glass has a color rendering index of Ra >99%.
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Coated glass
Since the early 80s, coated glass is commercially available. To connect the glass transparency with the excellent emission properties of precious metals, thin metal layers are attached to the glass. Thus a permeability of sunlight is guaranteed while simultaneously reducing the emissivity of the glass surface. Silver is one of the main components of the metal layers by which neutral Low-E coatings with low emissivity (e=0.04) can be made to guarantee in standard structures with argon filling a kV-value of 1.1 W/m²K in accordance with DIN. Therefore it is possible to produce a wide range of products with kV-values up to 0.5 W/m²K according to DIN in the insulating glass structure from the basic glass. A combination of sound proofing glass or safety glass is also feasible.
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Compressive strength
Glass has a compressive strength of 1000 N/mm2 = 1000 MPa, ie for a glass cube with a side length of 10 mm, a weight of about 10 tons would be necessary before it comes to break.
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Condensate formation
Dew or condensation will form on exterior glass surfaces when these are colder than the adjacent air (e.g. fogged car windows). The determination of the condensation formation on the outer surface of a glass pane is made by the u-value, humidity, air flow and the indoor and outdoor temperature. Condensation in the inner region is generally caused by derogation of air circulation, e.g. by deep soffits, curtains, flower pots, window boxes, venetian blinds, but also by an unfavorable arrangement of the heaters and a lack of ventilation. Condensation occurs on the weather-side surface of insulating glass when the relative humidity outside is high at an even higher air temperature compared to the surface of the glass pane.
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Condensation
If the glass surface is colder than the immediate air it leads to a formation of condensate (condensation), e.g. misted car windows. The U-value, humidity, and air flow; but also the inner and outer temperature influence the formation of condensation on the glass surface. Obstruction of the air circulation, such as through deep soffits, curtains, flower pots or boxes, but also venetian blinds or an unfavorable arrangement of the heaters promotes the development of condensation on the inner glass surface. Condensation can form on the outside of thermally insulated insulating glass, when the humidity outside (also relative humidity outside) is high and the air temperature is higher than that of the glass surface.
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Countersash window
A countersash window is made of two sashes. These are connected together and move simultaneously when opened. For the cleaning of the sashes it is possibile to open them with a specially designed key. In the fifties this type of window was produced but was supplanted from the market by insulating glazing.
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Coupling on windows
The coupling of PVC is usually made of coupling springs and is mounted in a window-door combination for example. Whereas elements of wood are screwed together.
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