Spacer on Window Panes

A spacer is an object placed between the panes of glass in a window. The spacer serves several purposes:

• It maintains a uniform distance between the panes of glass.
• It helps prevent sealant distortion.
• It accommodates stress caused by changes in temperature and pressure.
• Combined with sealants, it prevents moisture and gas leaks within the window

Spacers were traditionally made of metal, such as aluminum or galvanized steel. These metal spacers can cause significant heat loss and condensation, but newer metal spacers, which are frequently made of stainless steel, thermally broken aluminum, or metal with an insulating plastic layer, have helped reduce this problem and minimize heat loss. Other new spacers are made of foam and plastic, and these tend to cause significantly less heat loss.