Insulating Glass refers to two or more lites of glass sealed around the edges with an air space between, to form a single unit. Commonly referred to as an “IG unit,” insulating glass is the most effective way to reduce air to air heat transfer through the glazing. When used in conjunction with low-E and/or reflective glass coatings, IG units become effective means to conserve energy and comply with energy code. Manufacturing process involves the following steps: A hollow Aluminium spacer bar is bent into the desired shape. Holes are drilled in the spacer bar, which is filled with a desiccant such as silica gel or zeolite that helps in absorbing water vapour.The drilled holes are sealed with a primary sealant such as butyl. Primary sealant is also applied to the sides of the spacer bar. Two glass panes are placed along the side of the spacer bar and pressed with an automatic presser. A secondary sealant such as polysulphide or silicon is applied along the sides of the whole unit. The insulating glass unit is ready.
Applications of IGU:
- Insulating glass (IG) units are used in a wide range of applications including:
- Commercial/Residential Fixed and Operable windows
- Curtain Walls
- Sloped/Overhead Glazing
- Non-vision (Spandrel) Locations