Is Thermal or Extra-Thermal Storefront Glass Worth It?

If you’re shopping for storefront glass in Colorado, you might be wondering if non-thermal (non-insulating) glass is ok, or if you should upgrade to thermal or extra-thermal. Below we briefly discuss what thermal and extra-thermal storefront glass is, what it does, and if it’s worth it.

What is Thermal and Extra-Thermal Storefront Glass

In the glazing industry, when we talk about thermal or extra-thermal storefront glass, we’re really talking about the metal framing that holds the glass. Thermal storefront glass is housed in a frame that has a space in it that’s filled with rubber or polyurethane. This rubber or polyurethane is what holds the two pieces of metal framing together. This space is called a thermal break or a single pour. See image below. Extra-thermal glass has two spaces in the frame. This is called a double pour.

So, when you ask “Is thermal or extra-thermal storefront glass worth it?”, you’re really asking “Is one or two thermal breaks in storefront glass worth it?” Is one break or space better than none, or is two better than one? One or more thermal breaks helps to make sure when the outside of the frame is freezing, the frame inside isn’t. Not only do thermally broken windows help reduce heat and cold transfer, they also help reduce noise. This is something to remember when you’re trying to decide between thermal or extra-thermal storefront glass.

Is Thermal or Extra-Thermal Glass Right For You

Temperature

When considering thermal or extra-thermal compared to non-thermal glass, one needs to consider the U-value of each. The lower the U-value of glass, the better it performs or insulates. Single pane, non-insulated glass has a U-value of around 5.2 to 5.8. Thermal storefront glass, on the other hand, often has a U-value of less than half this. Extra-therma storefront glass is often halved still.

Noise

Most storefronts that face the inside of a building, such as a department store inside a mall, don’t require insulated glass. This storefront isn’t faced with extreme weather changes or freezing temperatures. However, because of the noise-reducing qualities of thermal and extra-thermal storefront glass, your store might benefit. Imagine a book store inside a mall and just outside your storefront is a food court. With thermal or extra-thermal glass, your book store will be quieter.