Since 1971, CGP has been your insulated glass specialist.
For over five decades, Custom Glass Products (CGP) has set the standard in custom insulated glass manufacturing. From residential renovations to large-scale commercial projects, our Insulated Glass Units (IGUs) are built with precision, performance, and lasting value in mind. Whether you’re repairing an existing window, matching a legacy design, or developing something entirely new, CGP offers the experience and capabilities to bring your vision to life.
The Power of Insulated Glass
An Insulated Glass Unit, or IGU, consists of two or more panes of glass separated by a sealed air or gas-filled space. This design provides a thermal barrier that dramatically reduces heat transfer, improves energy efficiency, and enhances overall comfort.
By minimizing condensation and controlling temperature fluctuations, IGUs contribute to a building’s energy performance, sound control, and long-term durability. It’s why they’ve become the preferred choice for modern window systems in both residential and commercial settings.
At CGP, we don’t just fabricate insulated glass—we custom-engineer it for superior performance and precision fit to your exact specifications.
Unmatched Experience and Expertise
Since 1971, CGP has been at the forefront of glass fabrication and insulation technology. Our team combines decades of craftsmanship with advanced manufacturing processes to produce high-quality, custom-made insulated glass for any application.
Over the years, we’ve earned a reputation for reliability, flexibility, and consistency. Whether you need a single replacement panel or a high-volume production run, CGP has the equipment, materials, and expertise to handle your project efficiently and accurately.
Our insulated glass capabilities include:
Custom sizing and shapes for windows, doors, and specialty applications
Multiple spacer options, including warm-edge and traditional aluminum designs
Dual-pane configurations for enhanced thermal performance
Gas fill options (argon) to optimize energy efficiency
Low-E coatings to improve solar control and reduce UV transmission
Built for Performance and Longevity
Every CGP Insulated Glass Unit is produced under strict quality standards to ensure airtight seals, consistent clarity, and long-lasting performance. We use advanced sealing materials and desiccants that prevent moisture penetration and fogging—common issues that can compromise lesser-quality IGUs.
Our state-of-the-art fabrication process ensures uniform glass spacing, clean edges, and exact dimensional accuracy. The result is a product that not only meets industry standards but exceeds expectations for durability, energy efficiency, and visual appeal.
Versatility for Every Application
CGP’s insulated glass solutions are designed for a wide range of window and door systems, including:
- Homes and renovations
- Commercial and institutional buildings
- Specialty architectural applications
- Glass repair and replacement services
Because we specialize in custom fabrication, our team can match virtually any glass specification, from color and thickness to edgework and performance coatings. If your project requires a specific look or technical performance, we’ll help you achieve it with precision and speed.
A Trusted Partner in Quality and Service
When you work with CGP, you’re choosing more than a supplier—you’re gaining a true manufacturing partner. Our customers rely on us for fast turnaround times, consistent quality, and dependable communication from start to finish.
We understand that timelines matter, and our in-house production capabilities allow us to deliver on schedule without compromising craftsmanship. From initial consultation to final delivery, we’re dedicated to ensuring your complete satisfaction and your customer’s long-term confidence.
The Clear Choice Since 1971
For nearly 50 years, Custom Glass Products has helped shape the glass and window industry with our innovation, reliability, and commitment to excellence. Our Insulated Glass Units are a reflection of that legacy—combining modern engineering with traditional craftsmanship to deliver unmatched value in every pane.
Whether your goal is energy efficiency, design versatility, or precision performance, CGP’s Insulated Glass Units provide the clarity, quality, and confidence you can build on.
“If You Can Draw It, We Can Make It.”
Custom Windows
Our custom windows will provide all the benefits you want and expect, without compromise.
Low E- Glass
Low-E glass is glass that has been coated with a microscopic layer. This near invisible layer lowers the emissivity of the glass, blocking long-wave radiation for improved thermal performance.
Door Inserts
Designed and built to seal out and shrug off the elements for a lifetime, CGP door inserts combine sophisticated European design, with age-defying materials and construction.
Catalogs
High Performance
High-performance glass options can give you added protection from ultraviolet (UV) rays so that your home will be more energy efficient and you’ll experience less fading of your furnishings and other belongings. When you combine glazing with 2 or 3 panels of glass separated by a vacuum or gas, you get exceptional results that can reduce heat loss by 50% or more when compared to standard glass.
WINDOW SERVICES
Whether you’re looking to fill an opening in a building or an opening in the window market, CGP Window Services is your ideal, out-source resource.
FAQs About Insulated Glass Products
As a window manufacturer, you understand the importance of energy efficiency when it comes to selecting windows, and you strive to provide your customers with products that take this into account. If you are looking for an outsourcing partner that can provide insulated glass products, look no further. Consider the frequently asked questions about insulated glass products below and contact us for additional information.
What benefits can my business enjoy from providing insulated glass products?
What gives low-E glass its properties?
Low-E glass is characterized by a special coating or microscopic layer. This coating is typically a metal or metallic oxide that is not apparently visible, but it is highly effective in blocking out long-wave radiation. It reduces infrared and ultraviolet light, but still allows sufficient light to enter to create a bright, natural indoor environment.
What sizes are available?
Step by Step guide to Ordering
There’s no such thing as a project that’s too complex for us! We can tell you everything you want to know about our Decralite® products and what benefits you receive by joining our program. Contact us today to talk to one of our sales representatives!
