Choose insulating and self-cleaning glazing

Choose insulating and self-cleaning glazing

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There are several ways to have an ecological attitude when buying a window: opt for materials with low ecological impact or choose well insulating windows in order to save heating costs. Glass, as such, is a very good heat conductor and therefore a very poor insulator. But it can be isolated by assembling two sheets of glass around a blade of non-conductive gas (air, argon or crypton). Double glazing becomes three times more insulating than conventional insulating glazing, and five times more than single glazing. For 20 years, the insulation performance of glass has quadrupled. Reinforced insulation (VIR), meanwhile, is provided by a thin transparent layer of silver metal oxide deposited on one of the interior faces of double glazing. This low-emissivity layer forms a thermal barrier and retains heat inside the home. Some VIRs also have a solar control function which prevents part of the external solar energy from entering the house while preserving natural light. An advantage for summer comfort. Today, glassmakers also offer triple glazing. Its main advantage lies in the thermal performance, which is superior to that of double glazing. It is equal to approximately 0.8 W / m2.K * - Unit of measurement for thermal performance. The closer the number is to zero, the better the insulation. That of double glazing with reinforced insulation (VIR) is 1.2 to 1.1 W / m2.K. Triple glazing nevertheless has drawbacks. Its mass, first of all, which imposes significant mechanical stresses on window frames. Its cost, then, since its price is 80% higher. Its greatest interest is part of an approach of optimal limitation of energy losses and consumption low enough to find its place in a passive house.

Self-cleaning glazing: towards the end of a chore?

Launched in 2008 by Saint-Gobain Glass, self-cleaning glazing is based on the double action of daylight and water. Explanations. The glazing has been treated with a simple chemical process which prevents the dust from accumulating under the effect of the sun. It drains more easily, is distributed over the entire glass and removes the dirt that has caught on. The interview is not entirely suppressed but is very widely spaced. If its interest is no longer to be demonstrated, it relates more to communities or businesses, in almost all cases of large buildings with glass facades. Its advantage is negligible, however, for individual housing, except perhaps for very large bay windows. The implementation of self-cleaning glazing on site is very delicate. Care must be taken to add specially adapted profile seals to it and be careful of incompatibilities with silicone parts. In addition, self-cleaning glazing, like all new products, is expensive. But luckily, its price is starting to drop. The more carpenters will offer it, the more its price will decrease. > Find out more about self-cleaning glass


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