Insulated Glass

Versatile uses

How Insulated Glass Works

Insulated glass units (IGUs) have three major parts. Insulated glass windows are typically double or triple-paned, or are double glazed, separated by a spacer and contain a pocket of air in between. This helps to seal the window panes together. It’s like having a thermo-unit in your window.

Most heat insulation comes from the space in between the panes. The space can be filled with air, but more often than not, it’s filled with argon, krypton or other gasses that slow the transfer of heat.

The spacer that separates the two panels is filled with desiccant — a moisture-absorbing material that eliminates humidity.

Insulated glass goes through a lengthy dual-pane process (sometimes even more). Two panes of glass are put into each spacer to get the double-pane insulating effect. It’s then put into a vacuum chamber to get argon gas inside the two panes.

Lastly, once the glass is tempered and polished clean, a high-grade sealant is used on the glass unit’s parameter to hold it all in place. This keeps insulating gas from escaping and moisture from entering. Any excess sealant is scraped off of the edges.

Insulated Glass


Residential Application​

Residential glass is more than just simply windows and doors. There are a variety of different types of glass, muntin bar options, and different applications associated with them. They can be used to increase privacy and security in a home, enhance the aesthetics of a room, or improve the energy efficiency of a property. Please see the visual representation of Muntin Bars or Grids in a unit.
Temperature control

Commercial Application

  • Insulating glass is traditionally used at office buildings, Hospitals, Hotels, and other buildings where large amount of heating or cooling is required.
  • Those places where humidity and temperature needs to be controlled, Insulated glass is best suited for them. Insulating glass is also used in airports control towers
  • Laminated Glass can be added for acoustic requirements.

Insulated Glass Components

Primary Seal

Polyisobutylene (PIB) Minimizes moisture permeation and provides one of the lowest argon permeation rates of all known sealants.


Mill, Black, Bronze, Aluminum Spacers. Stainless Steel spacers are available upon request. Spacer unit provides maximum area for primary and secondary sealant coverage. It provides increased resistance to condensation and less stress on the insulated seal system.

Secondary SIlicon Seal

Provides consistent long-term adhesion. Due to the non-organic nature of silicone, silicone provides support against weathering and adhering to glass substrates. Due to structural properties, silicone provides structural integrity to all of our insulated units.


Molecular sieve creates a frost point below -85 degrees fahrenheit. Desiccant assures optimum moisture absorption and minimizes the effects of temperature-related pressure changes. Certified in accordance with ASTM Specification E-2190 through: IGCC & IGMA.

Argon Gas

Argon is an invisible, non-toxic gas with lower thermal conductivity than air. It can be used in place of air within an insulating unit to improve thermal performance (U-Value). Argon gas alone is not enough to meet energy requirements. It should be specified in conjunction with a low-e coating in order to provide optimal thermal performance.


Tolerances for coated glass per ASTM C1376 is adhered to by GTS Inc. Any testing documentation required can be provided upon request by the float manufacturer. GTS Inc. is certified to fabricate all coated glass in accordance with Vitro Certified Fabricator Network & Guardian Select™ SunGaurd Fabricator Certifications. GTS Inc. warrants its dual seal insulated units for 10 years from the date of manufacture for use and service under normal conditions. This limited warranty shall be void if unit has not been stored and/or maintained in proper workmanlike manner and does not cover unit seal failure by acts of God, improper application, or improper installation. This warranty shall only apply to the units that are installed vertically by qualified professionals in accordance with FGMA glazing manual and IGMA guidelines for vertical glazing. This warranty shall be void if unit is installed in high moisture and/or high vibration environments. Installation of breather tubes must be requested by the customer for high altitudes and must be sealed in accordance with proper glazing guidelines. Our insulated site line is determined by the overall size of the unit and certainly will meet or exceed industry quality standards. Certain limitations apply to this warranty regarding size, overall thickness, and make-up of the unit. GTS Inc. fabricates insulated glass consisting of sheets of glass hermetically sealed at all edges with polyisobutylene primary and a black silicone secondary elastomeric sealant. GTS Inc. can provide insulated glass with bent corners; however, GTS Inc. cannot guarantee the location and/or number of splices based on the overall size of unit. GTS Inc. recommends its standard processes and adheres to cut corners and corner keys to eliminate all visible splices.
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Capability Guidelines

Take a look at what we can fabricate for your next glass project.