Standard insulating glass

The insulating characteristics of the air or gas within this enclosed space are utilized to minimize heat transfer through the glazing (Ug value). These insulating properties can be further enhanced through various methods such as low emissivity coatings, the type of gas used, or the width of the cavity, etc.

Possibilities of composition of insulating glasses

Insulating glasses consist of the following components:

• Two or three layers of glass.

• A spacer frame that determines the width of the gap between the two panes. This spacer frame can be connected using corner mechanisms or can be bent. It may be constructed from steel, aluminium, or synthetic and composite materials, utilizing “warm edge” technology with a “warm spacer frame.” A synthetic spacer frame is specifically designed for certain applications.

• A cavity between the two glass panes that is filled with air or another gas, such as argon or krypton, which is injected into the space during the manufacturing process.

• The initial waterproof barrier is constructed from butyl and is positioned on the side of the spacer frame that contacts the glass. Its purpose is to prevent moisture from penetrating into a space that may be filled with air or gas.

• A secondary waterproof barrier, or sealant, is applied around the edges of the glass panes and the spacer frame. This sealant’s role is to provide mechanical stability to the entire assembly. The secondary sealant can be made from polysulfide, polyurethane, or silicone. In cases where the secondary sealant will be exposed to sunlight or for specific applications, it is recommended to use silicone exclusively.

• A moisture absorber is situated within the spacer frame, designed to dry (absorb) the gas trapped in the cavity between the panes of glass and to capture any moisture that may seep into the glazing through the primary and secondary sealants over time.

The durability of the glazing is affected by how well the moisture absorber and waterproof barrier function. If the moisture absorber becomes ineffective or if the seal is no longer airtight, condensation or precipitation may form inside the glazing, necessitating its replacement.