Triple Pane Windows
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Triple Pane Glass: Our Unfair Advantage
Triple Pane glazing technology incorporates a third pane of glass, which creates multiple insulating gas chambers and additional surfaces for reflective Low E coatings.
OK, what the heck does that mean?
Typical windows have TWO panes of glass, ours have THREE. And that extra layer of protection provides a LOT of benefit.
The best part? Because of our national buying power, we can sell Triple Pane for what most of our competitors sell outdated dual pane for! Keep reading for more details.
Dual Pane Window Compared to Triple Pane Windows!
In all of the windows that Window Depot USA sells…the glass has at least TWO panes. Putting two panes of glass inside of one window is referred to as ‘dual pane’, and is sometimes called ‘thermal-pane’.
These two panes of glass provide an extra barrier to heat loss (or gain) during the heating and cooling months of the year. The two panes of glass, plus the airspace between…is what allows for improved insulation.
Then when Low E coatings and specialized gas fills like Argon are incorporated…we have what we call an Insulated Glass Unit. This is why we say that the IG is essentially the engine of the window.
THE TRIPLE PANE INSULATED GLASS UNIT
As amazing as dual pane windows are, there is a ‘next level’ energy saving technology, and that is Triple Pane. As you might expect…this means that a THIRD layer of glass is incorporated into the Insulated Glass Unit.
But while this may sound simple, the effects are drastic!
INCREASED INSULATING POWER
Our Triple Pane windows can increase the U Factor of dual pane, clear glass windows by up to 52%. This improvement comes from a combination of the extra pane of glass, multiple cavities that contain insulating ‘blankets’ of Argon gas, and additional glass surfaces on which to apply our Low E coating technology.
Whether you live in a climate that demands more heating, or cooling of your home…the key to our Triple Pane insulating power is stopping heat flow.
In heating climates, triple pane windows keep more of your warmth and energy IN. In cooling climates, triple pane windows keep more of the radiant heat and temperatures OUT.
ENHANCED CONDENSATION RESISTANCE
Condensation Resistance Factor (CRF) is a measurement used to quantify a window’s ability to resist condensation from forming. Whenever condensation is present, the first thing to look for is the atmospheric conditions…or more simply put, is your home encouraging condensation. This can come from high humidity levels and/or lack of sufficient air-flow in the home…and is magnified by windows that do not provide good insulation.
The reason why insufficient windows promote condensation is that the surface of the glass gets cooler as heat escapes.
Highly insulating windows keep the temperature on the surface of the glass warmer, and thus more resistance to condensing the moisture-rich air in the atmosphere of your home.
Our triple pane windows enhance condensation resistance of normal clear glass windows up to 49%, and can even improve normal dual pane Low E windows by over 20%.
There are many reasons to promote good condensation resistance. Excess moisture can lead to rotted window sills, and even mold and mildew promotion.
Triple Pane windows offer the highest CRF’s available.
ELIMINATE OUTSIDE NOISE
Another great feature of triple pane windows is their ability to block out more the NOISE from the outside world.
The additional pane of glass, plus the extra airspace created in the Insulated Glass Unit provide additional barriers to sound transmission.
Peace and quiet can be priceless!
Learn More About Our ProVia Vinyl Replacement Windows
Decorative Options
Innergy is the innovative, energy-efficient alternative to aluminum, with added insulating properties making it 700 times better.
As the next-generation of thermal reinforcement for the industry, Innergy is able to deliver a quantum Leap above aluminum in how windows perform.
- Better Thermal Performance
Up to 700 times better than aluminum in material comparisons.
- Better Thermal Break
Impervious to cold or heat.
- Better Protection Against Condensation
Helps prevent staining that can occur with metal reinforcements.
- Better Impact Testing
Resistance to impact versus other reinforcement products.
- Better Flexibility
Will not permanently set when impacted.
Bulb seals are seamless closed-cell compression seals that prevent water from penetrating the foam cell structure. Its extruded skin provides a unique UV resistant barrier with design features that enhance the weatherstrip’s sealing performance.
Seal woven and extruded pile weatherstripping with fin provides a very effective barrier against air, water, dust and noise, sealing against even and uneven surfaces with resistance to abrasion.
Neopor gives maximum efficiency and sustainability in building products. It is comprised of many small pockets of air within a polymer matrix containing graphite. The graphite reflects radiant heat energy like a mirror, increasing the material’s resistance to the flow of heat, or R-value. Neopor is unique because it increases R-Value as the temperature outside drops.
For homeowners looking for the absolute maximum in energy efficiency.
- U Factor = 0.17
- Energystar MOST EFFICIENT
- Triple Glazed
- 2 Low E Glazing Surface Coatings
- Krypton Insulating Gas-Filled In Two Chambers
- Warm-EdgeSpacer Technology
- SHGC = 0.23
- VLT = 0.37
- Air Infiltration = 0.05
For more information on this extraordinary insulating package, please contact your local Window Depot.
Our Signature Package* With the GOLD package from Window Depot USA, your windows come with the following energy saving features:
- U-FACTOR of 0.19
- Energystar MOST EFFICIENT Awarded
- TRIPLE Pane Glazing Technology
- Dual Surface Low E
- Argon Gas Fill
- Solar Heat Gain Coefficient = 0.23
- Visible Light Transmittance = 0.37
- Air Infiltration = 0.05
This combination of price, energy performance, and overall value cannot be matched!
Chock full of features, many of which our competitors consider “upgrades”, the Silver PLUS package from Window Depot USA also gives you certified Energystar performance.
- Double Glazed
- Double Stacked Low E Glass
- Argon Insulating Gas-Filled
- U Factor = 0.27
- SHGC = 0.27
- VLT = 0.50
- Air Infiltraion = 0.05
No Company Can Provide You With More Features at a Better Price
Why Choose Vinyl Replacement Windows from Window Depot USA of St. Louis?
Our windows are constructed of SunShield® vinyl, made with a compound proven to perform better than alternative building materials. Vinyl ensures long-lasting color retention and low maintenance, plus the added confidence of a warranty against rotting, cracking, pitting, corroding, and peeling. The vinyl is resistant to rot, insect and microbial damage, never requires painting, and is easy to clean.
- Low Maintenance – Vinyl windows are the low-maintenance choice for residential use.
- Superior Weatherability – SunShield vinyl is uniquely formulated to withstand the harsh effects of weather, UV light, and southern exposure.
- Color Retention – Pharmaceutical-grade compounding and blending systems provide consistency, so you can rely on superior color and weatherability.
- Designed to Perform – Industry partnerships and ongoing research into new technologies ensure the vinyl compound exceeds industry standards, outperforms the competition and works together to offer best-in-class technology.
- Uncompromising Quality and Performance Testing – SunShield vinyl meets or exceeds the standards for strength and color retention established by the American Architectural Manufacturer’s Association (AAMA).
St. Louis’s Best Value in Replacement Windows, Entry Doors, and Sliding Patio Doors
When it comes to increasing energy efficiency, improving curb appeal, comfort, and noise levels of your home, there’s no better investment than replacement windows from Window Depot USA. But with so many different window replacement companies to choose from, how can you be sure you’re getting the best possible service?
Window Depot USA of St. Louis understands that windows and doors are more than just functional components of your home; they’re part of your connection with your neighborhood.
See What Our Happy Customers are Saying
“Great experience with Window Depot! 22 windows installed with expertise, and the ProVia windows are top quality. AC and heat runs maybe less than half compared to the failed windows that were 26 year old builder grade. Customer service was very professional, including one broken glass on delivery which they ordered immediately and replaced the sash in 2 weeks.”
Mark M.
MO
May 7, 2026
“I had a great experience with window depot stl from start to finish. Joey initially came out and took the time to go over all the details with me.He was knowledgeable thorough and fantastic to work with. When it came time for installation Ryan and his crew did an amazing job. They were professional, efficient, and the quality of their work really shows. The entire process has been smooth and I couldn't be happier with the results. I highly recommend Windows depot to anyone looking for quality windows and excellent service. Thanks again”
Amy L.
MO
May 6, 2026
“If I could give them 10 stars I would! From the first conversation with Joey, then to Ryan and his crew was absolutely top notch! The attention to detail, the care and respect for your home is second to none. When they came today to install windows in my home they laid down floor covers to protect our hardwood floors....how thoughtful! Extremely respectful of our home. Amazing job! Definitely recommend you to all my friends”
Rod
MO
May 5, 2026
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