Compared to single glazing, double or chamber glazing, also called Climalit glass, forms excellent thermal and acoustic insulation, with savings of more than 50%.
Double glazing is formed by two panes of glass (exterior and interior) separated by a hermetically sealed chamber of dehydrated air, preventing the entry of damp or dirt. The air chamber reduces heat transfer between the inside and the outside.
The most normal and economical combinations in a domestic window are usually: 4mm+12mm+The air chamber most commonly used is 12mm. The width can range from 6mm to 20mm. However, the width of the chamber makes hardly any difference in thermal and sound insulation. 4mmPane 4mm thick + air chamber 12mm + pane 4mm thick. This is very economical double glazing. o 6mm+12mm+4mmThis glass also performs very well with sound. A U value of approximately 2.5 W/m2K is obtained, compared to a U value of 5.8 W/m2K in single glazing.
FENSTER advises against the use of single glazing (without air chamber) because of its poor performance, and recommends double glazing
Recently, triple glazing appeared for situations requiring insulation levels much greater than normal. It includes a third pane of glass inside, generating two air chambers instead of one.
Double glazing can be combined with other functions: reinforced sound insulation; solar control; low emissivity; simple safety or anti-accident against accidental breakage; self-cleaning, or security in the case of burglary or vandalism.
Double glazing is the option chosen by the vast majority of users