Some window companies will tell you that 3 is better than 2. What I mean is triple pane windows are better than double pane. Well, that just isn’t true. Triple panes may have been great back in the day, before window science evolved to make glass highly energy efficient. But today’s window technology has all but made triple panes obsolete.
Here is what I told a customer recently — two great ideas have changed window glass forever:
Great Idea #1: Low-E (low-emissivity) glass. This means that a thin coating of transparent metallic material, like silver oxide, is applied to the window glass, which acts as an insulating film. This Low-E coating helps to prevent heat gain (or loss) in your home by acting as a kind of reflective shield, pushing radiant heat that tries to pass through the glass back to the source it originates from.
By the way, Renewal by Andersen windows have 9 layers of metallic materials applied in a micro-thin layer, followed by 2 layers of titanium dioxide to help make cleaning easier.
Great Idea #2: Argon gas is an invisible, nontoxic, odorless gas that’s injected into the space between dual glass panes. Air is easily affected by heat, but argon is much denser than air, so the weight of this gas dramatically reduces the amount of heat that can pass through the space between the panes of glass.
If that isn’t enough to convince you that triple panes are obsolete, here’s one more good reason: they’re heavy. They’re a pain!
It’s been my experience after 27 years that three panes of glass make for a very heavy sash, which will make your balance system break down that much quicker. That means, eventually, your window won’t stay up when you try to raise it. You’ll be out shopping for new windows. So triple pane windows can soon become a pain in the pocketbook too.
Dual-pane gas-filled windows with Low-E coating trump triple panes any day.