Triple Pane Windows

What’s the difference between single, double, and triple-pane windows? Not surprisingly, windows with one layer of glass are called single-pane, two layers are referred to as double-pane (or double glazed), and finally, triple-pane windows have three layers of glass. What are the benefits and drawbacks of one more incremental glass sheet? Most people are already somewhat familiar with single and double-pane windows, so let’s talk about the pros and cons of triple-pane glass.
Pros of Triple-Pane Glass
1.    Energy Savings

It has been well established that double-pane windows can add significant energy efficiency to a home that previously only had single-pane windows. The extra glass and gas sealed between the two panes are able to keep the unpleasant temperatures outside and the pleasant ones inside much more proficiently. So how much more energy could you save from adding another pane of glass? Three layers of glass can give you up to 50% savings over your single-pane windows and up to 20% savings on top of double pane.
2.    Improved Insulation

The improved insulation of triple-pane windows leads to other benefits likebetter soundproofing. The more layers the light waves and sound waves have to go through, the more insulated your home will be. The insulation will alsoprevent interior condensation on your windows as outside temperatures fluctuate.
3.    Added Security

Break-ins are a nightmare that no one wants to fall victim to. Flimsy single-pane windows wouldn’t be much of a challenge for burglars, but those extra layers of glass would be much harder for intruders to break through.
Cons of Triple-Pane Glass
1.    Extra Weight

Unfortunately, the extra glass makes the sashes much heavier, putting a lot of pressure on the window frame. Vinyl window frames in particular will have difficulty in supporting so much heavy glass because the vinyl material is not very strong. The heavy glass can cause problems in casement windows and doors, as the hinges can’t bear the extra weight of the windows and will start to bend over time. With a double or single-hung window that operates vertically, that weight can cause it to accidentally slam shut.
2.    Excessive Exterior Condensation

A flipside drawback to the insulating strengths of triple-pane windows is that a lot of condensation can form on the exterior of the windows on cold mornings. While this does mean that the cold air is not penetrating the window, it is inconvenient when you can’t see out your windows.
3.    Extra Cost

Because of the added glass and an increase in the size of the frame that must support it, triple-pane windows are among the most expensive on the market. They can cost anywhere from 25-30% more than comparable double-pane windows. Unless you live in a very cold climate, the extra expense would probably not be justified by any significant energy savings over good double-pane windows.

If you are researching triple-pane windows to decide whether or not they are a good fit for your home and you have any further questions, we’d love to help you. Give us a call or contact us directly.