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Order custom insulated glass units (IGUs) from Liberty Shielding for commercial, institutional, medical, security, and specialty glazing applications.
An insulated glass unit—also commonly called double pane glass, double glazed glass, or an IGU—combines multiple panes of glass separated by a sealed spacer system. The insulating airspace reduces heat transfer through the glazing while allowing different glass technologies to be incorporated into a single assembly.
Choose from standard clear and Low-E insulated glass or specialized configurations incorporating laminated safety glass, fire-rated glass, X-ray lead glass, bullet resistant glass, acoustic glazing, and other specialty products.
Each IGU is custom fabricated according to the dimensions and configuration selected for your project.
Choose your glass configuration and enter your required dimensions above to see your price and order custom insulated glass online.
An Insulated Glass Unit (IGU) consists of two or more panes of glass separated by a spacer and permanently sealed around the perimeter.
The space between the panes creates an insulating cavity that reduces direct heat transfer through the window compared with a single pane of glass.
A typical double-pane IGU consists of:
Exterior Glass + Sealed Airspace + Interior Glass
Depending on the application, either glass surface can be upgraded with specialized glazing to provide additional performance.
Options can include:
This allows an insulated glass assembly to provide much more than thermal insulation alone.
The sealed space between the panes helps reduce heat transfer through the glazing.
When combined with an appropriate Low-E coating, an IGU can provide substantially better thermal performance than conventional single-pane glass.
Improved window performance can reduce unwanted heat gain during warmer conditions and heat loss during colder conditions, helping improve overall building energy performance.
The insulating cavity helps maintain warmer interior glass surface temperatures during cold weather, which can reduce the potential for interior condensation under appropriate environmental conditions.
Multiple panes separated by an airspace can provide better sound attenuation than a comparable single pane.
For noise-sensitive environments, different glass thicknesses, laminated glass, and specialized acoustic configurations can be used to further improve sound performance.
One of the biggest advantages of a custom IGU is the ability to combine thermal performance with specialized glazing technologies.
Liberty Shielding can provide configurations incorporating radiation shielding, ballistic protection, fire-rated glazing, safety glass, and other specialty materials.
A standard clear IGU provides the basic benefits of double-pane glazing, including improved thermal performance compared with single-pane glass.
Common applications include:
Low-E insulated glass incorporates a low-emissivity coating designed to reduce infrared heat transfer through the glazing.
Low-E IGUs are commonly used for exterior windows where improved energy performance is required.
Benefits can include:
Actual thermal performance depends on the complete glass configuration, coating, spacer, airspace, and other assembly characteristics.
Tempered glass can be incorporated into an IGU when increased strength or safety glazing is required.
Tempered glass is heat treated to increase its strength and change its breakage characteristics compared with ordinary annealed glass.
Where safety glazing is required by code, the appropriate tested safety-glass configuration should be selected.
Laminated glass consists of multiple layers bonded together with an interlayer.
When incorporated into an IGU, laminated glass can provide benefits including:
The exact performance depends on the laminated glass construction selected.
Liberty Shielding can incorporate X-ray lead glass into an insulated glass unit for medical and industrial applications requiring transparent radiation shielding.
This provides the radiation attenuation of lead glass while allowing the assembly to incorporate an exterior glazing pane and sealed airspace.
Applications include:
The required lead equivalency should always be determined by the project's medical physicist, radiation safety officer, shielding report, or other qualified radiation professional.
Specialized bullet resistant glass can also be incorporated into an IGU for applications requiring ballistic protection along with an additional exterior or interior glazing surface.
Applications can include:
Ballistic performance depends on the specific tested glazing construction. The appropriate threat level should be selected according to the project's security requirements.
Certain fire-rated glass products can be incorporated into insulated glass configurations for approved applications requiring fire protection along with additional glazing performance.
Fire-rated glazing must be selected according to the requirements of the complete opening.
The allowable fire rating, dimensions, frame, glazing method, and application depend on the specific listed system.
The fire rating of an individual glass component should not be assumed to establish the fire rating of an arbitrary IGU or complete window assembly.
Insulated glass can also be configured to improve sound attenuation.
For applications where noise control is important, performance can be enhanced through combinations of:
Acoustic IGUs are useful for:
Where a specific STC rating is required, the glass construction should be selected according to tested acoustic performance.
One of Liberty Shielding's specialties is combining multiple glazing technologies into a custom assembly.
Depending on the project, configurations may include combinations such as:
Low-E + Clear Glass
For exterior windows requiring improved thermal performance.
Laminated + Tempered Glass
For applications requiring safety, durability, or enhanced glass retention.
Clear Glass + X-Ray Lead Glass
For insulated radiation-shielding windows.
Clear Glass + Bullet Resistant Glass
For ballistic glazing requiring an additional insulating or protective pane.
Fire-Rated Glass + Compatible Exterior Glazing
For approved fire-rated insulated glazing applications.
Other custom configurations may be available depending on the required dimensions and performance.
Every IGU is manufactured according to the required finished dimensions.
Custom fabrication allows you to specify the appropriate:
Maximum dimensions and available constructions vary according to the glass types, thicknesses, overall unit size, aspect ratio, and performance requirements.
The overall thickness of an insulated glass unit is determined by three primary components:
Exterior Glass + Spacer/Airspace + Interior Glass
For example, increasing the glass thickness or airspace increases the overall IGU thickness.
Specialty materials such as lead glass and bullet resistant glass can produce substantially thicker and heavier assemblies than conventional residential or commercial insulated glass.
Always verify that the window frame or glazing system can accommodate the finished IGU thickness and weight.
The primary difference between insulated glass and single-pane glass is the sealed insulating cavity.
| Feature | Insulated Glass Unit | Single Pane Glass |
|---|---|---|
| Number of Panes | 2 or more | 1 |
| Sealed Airspace | Yes | No |
| Thermal Performance | Improved | Lower |
| Low-E Options | Yes | Available, but without insulating cavity |
| Acoustic Potential | Better configuration flexibility | Limited |
| Specialty Glass Options | Extensive | Extensive |
| Overall Thickness | Greater | Thinner |
For exterior applications where energy performance is important, an appropriately configured IGU generally provides significant advantages over single-pane glazing.
IGU and double pane glass usually refer to the same basic type of product.
“IGU” is the architectural and glazing-industry abbreviation for Insulated Glass Unit.
“Double pane glass” is the term many property owners, contractors, and consumers use for a unit containing two panes separated by a sealed insulating space.
A double-pane window therefore typically contains an IGU.
In many window systems, fogged, cracked, or damaged insulated glass can be replaced without replacing the entire window frame.
A replacement IGU must match the dimensions, overall thickness, glass type, coatings, and other requirements of the existing glazing system.
Before ordering replacement insulated glass, verify:
Order using the required finished glass dimensions rather than the dimensions of the surrounding frame.
Custom IGUs are fabricated according to the dimensions entered when ordering, so accurate measurements are critical.
Whenever possible, determine the dimensions of the existing glass unit itself rather than simply measuring the visible opening.
The glass typically extends behind the frame or glazing stops, meaning the visible glass dimensions are not the same as the finished IGU dimensions.
If replacing an existing unit, consult the window manufacturer or remove and measure the existing IGU when appropriate.
Custom insulated glass units are used throughout:
IGU stands for Insulated Glass Unit. It consists of two or more panes of glass separated by a spacer and sealed around the perimeter to create an insulating cavity.
Generally, yes. A two-pane IGU is commonly called double pane glass or double glazed glass.
Yes. Liberty Shielding manufactures custom insulated glass units according to the dimensions and configuration selected for your project.
Yes. Low-E glass can be incorporated into an IGU to improve thermal performance for exterior glazing applications.
Yes. Tempered glass can be incorporated into one or both surfaces of an insulated glass unit when required.
Yes. Laminated glass can be combined with another glass pane and insulating airspace to create a custom laminated IGU.
Yes. Liberty Shielding offers X-ray lead glass insulated glass units for medical imaging and radiation-shielding applications.
Yes. Certain bullet resistant glass constructions can be incorporated into custom IGUs. The specific configuration depends on the required ballistic performance and project requirements.
Certain fire-rated glazing products can be incorporated into compatible insulated glass configurations. Fire-rated applications must be evaluated according to the specific listed glazing system and opening requirements.
In many window systems, yes. The existing IGU can often be removed and replaced while retaining the original frame, provided the replacement unit has the correct dimensions, thickness, and glazing configuration.
Measure the finished dimensions of the complete IGU, not simply the visible portion of the glass. Also verify the overall unit thickness and glass configuration before ordering.
Customer is responsible for unloading freight shipments. Larger IGUs and heavy specialty-glass configurations may ship by freight and require appropriate receiving equipment.
Prior to delivery of a freight shipment, you must arrange for a forklift, loading dock, or other suitable equipment and personnel capable of safely unloading the shipment. Freight carriers are not responsible for unloading material from the truck unless a specific unloading service has been arranged in advance.
Failure to have the proper equipment, personnel, or facilities available to receive and unload the shipment is not grounds for refusing delivery, cancellation, or return.
The customer is responsible for any additional charges resulting from re-delivery, missed delivery attempts, storage, detention, or changes to the delivery address after the order has shipped.
By placing and proceeding with an order, the customer acknowledges and accepts these delivery requirements and agrees to the Liberty Shielding Terms & Conditions available at:
https://shop.libertyshielding.com/terms-and-conditions/
Order custom insulated glass units (IGUs) directly from Liberty Shielding.
Choose your required dimensions and available glass configuration to create an IGU for your application, from standard clear, tempered, laminated, and Low-E insulated glass to specialized X-ray shielding, ballistic, acoustic, and fire-rated glazing configurations.
Enter your required finished glass dimensions and select your available options above to calculate your price and order online.
Custom cut. Multiple glass configurations. Built to your required dimensions.
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